Review of the excellent ADATA i-Memory UE710. Flash drive for iPhone and iPad. Review of the excellent ADATA i-Memory UE710 RAM a data 4gb
A-Data has expanded its line of high-performance memory for laptops with the release of the new XPG Gaming Series DDR3 SODIMM. This gaming memory series was previously released only for desktops, but now the company has decided to provide high-performance and at the same time capacious memory strips to mobile devices.
A-Data has updated its gaming line of DDR3 XPG Gaming Series memory kits and introduced two new dual-channel kits, which are characterized by high capacity and high operating frequency. For the production of new products, printed circuit boards, having double the amount of copper, which contributes to more efficient cooling. In addition, the memory chips contain aluminum radiator, also designed to improve device cooling. Both memory kits consist of two 4 GB modules, so the total capacity of each kit is 8 GB.
The 4 GB module can operate at DDR3-1600 MHz, with latencies of 9-9-9-24 and supports operating voltages ranging from 1.35 V to 1.4 V. Unlike other similar A-Data memory modules for laptops , the new product is equipped with a small radiator.
The module supports XMP technology to improve DDR3 performance. The memory is sold in one 4 GB module, or in a dual-channel set of 8 (2 x 4) GB. The cost of the new product has not yet been announced.
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A-Data has updated its gaming line of DDR3 XPG Gaming Series memory kits and introduced two new dual-channel kits that feature high capacity and high operating frequencies. For the production of new products, printed circuit boards with double the amount of copper are used, which contributes to more efficient cooling. In addition, the memory chips have an aluminum heatsink, which is also designed to improve device cooling. Both memory kits consist of two 4 GB modules, so the total capacity of each kit is 8 GB.
A-Data has released high-performance mobile SO-DIMM memory modules
A-Data company after release solid state drive N004 announced the release of new high-performance mobile DDR3 SO-DIMM memory modules, which differ low level power consumption, high performance and overclockability. Such devices are intended for use as part of gaming laptops, as well as for upgrading the memory subsystem of laptops by experienced users. The new products are presented as part of the XPG series and are called DDR3L 1600G. New memory modules operate at a frequency of 1600 MHz with timings of 9-9-9-24.
Kingston has developed two high-performance memory kits for laptops
In addition to several three-channel memory kits for high-performance desktop computers HyperX T1 Black Kingston company released two memory kits for laptops based on new platform Intel Huron River and Sandy processors Bridge. New items are available as part of the HyperX series. They consist of two SO-DIMM modules of the DDR3 standard. However, the capacity of the modules varies.
Acer has released an affordable laptop on the AMD platform
Acer has expanded the lineup laptops and presented available device TravelMate 5542 based on the AMD platform. The new product is equipped with a 15.6-inch display with LED backlight, which supports a resolution of 1366×768 pixels. The device also contains a 2-core AMD Athlon II P340 processor operating at 2.2 GHz, DDR3 RAM up to 4 GB, HDD with a capacity of 250 or 320 GB, optical drive DVD and Radeon HD 4250 graphics solution.
Transcend Releases 8GB DDR3 Memory Kits
After the announcement of CFast memory cards, Transcend has released new dual-channel DDR3 memory kits as part of the aXeRam series. Such devices are positioned for use by gamers, overclockers and professional users who use 64-bit versions of operating systems. The presented kits consist of two modules with a capacity of 4 GB each. Thus, the total capacity of the sets is 8 GB. Such memory modules operate at a frequency of 2000 MHz with timings of 9-11-9-24 with a supply voltage of 1.6 V.
Samsung releases 8GB DDR3 mobile memory modules
Samsung has announced the release of new DDR3 memory modules aimed at use in laptops and mobile workstations. Such new products are made in the SODIMM form factor and have a capacity of 8 GB. It is noted that for the production of new memory modules, DDR3 memory chips are used, manufactured according to the standards of the 40-nanometer technological process. For new products, the operating voltage is stated to be 1333 MHz with a supply voltage of 1.5 V.
Samsung has released cost-effective DDR3 memory modules
Samsung has announced the release of new DDR3 DRAM (dynamic random-access memory) memory modules designed to upgrade the memory subsystem of desktop and mobile computers. These new products are distinguished by high performance with low energy consumption. Samsung's new memory modules are based on chips that are manufactured according to the 30-nanometer technological process. The capacity of the modules can be 2 or 4 GB.
Elpida announced cost-effective DDR3 SO-DIMM memory modules
Elpida has announced new DDR3 SO-DIMM memory modules designed for use in laptops. The presented memory modules consist of 16 memory chips with a capacity of 2 GB each, so the total module capacity is 4 GB. In this case, the memory chips used are manufactured according to the standards of the 30-nanometer technological process. It is noted that such devices consume 20% less energy in operating mode and 30% less energy in standby mode compared to chips made on the basis of 40-nanometer technology.
Enermax has released a cooler for laptops Aeolus Premium CP003
After the release of the highly efficient Modu87+ power supply, Enermax has released the Aeolus Premium CP003 laptop cooler. The presented device has dimensions of 350x335x45 mm and allows you to install laptops with a screen diagonal of up to 17 inches. This model is made of aluminum, contains a steel grille, and its weight is 1.3 kg. The new product is equipped with a 250 mm fan, which can rotate at speeds from 650 to 850 rpm and produce noise from 17 to 20 dB.
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Today on my operating table there is a cool flash drive for iPhone, iPad or iPod Touch from ADATA – i-Memory UE710. The main feature of this flash drive is the ability to connect it to iDevices via the Lightning port, and the other side to the computer via USB port 3.0 (or 2.0). IN this review I will try to describe its capabilities, as well as its strengths and weaknesses.
i-Memory Flash Drive comes in a small cardboard box with a plastic insert. The kit includes the flash drive itself and instructions in a bunch of languages. Including in Russian. There is almost nothing written in the instructions, so we will figure it out ourselves.
The size is indicated on the front of the box (and on the flash drive itself). There are 3 options: 32, 64 and 128 gigabytes. In principle, it is logical that the line does not include 16 gigabytes (because it is not enough) and 256 gigabytes (because it would be very expensive).
On back side the dimensions of the device are given and system requirements. The flash drive is very light - only 16 grams. Fits in any pocket.
The top side of i-Memory is glossy black. Dust and fingerprints strive to leave their mark on the surface. There are also white and pink to choose from.
The reverse side in my version is gray. It can be seen that the body of the flash drive is tightly fastened from 4 parts.
Now comes the fun part. On the side of the flash drive there is a switch that has 3 positions:
- Left – USB available for connecting to a computer/TV
- Right – Lightning available for connecting to iPhone, iPad or iPod Touch 5, 6
- Central – both connectors inside the case. Convenient to carry.
Switching the position of the lever occurs with little effort and characteristic clicks. The positions are fixed very well, so the flash drive will not have a situation where you plug it into the port and the connector starts to crawl inside the case on its own. This is what annoys me about many regular USB flash drives.
Connect i-Memory to the device:
Program for interacting with iMemory flash drive
Unlike many Chinese counterparts, AData focuses on its built-in application, which is actively supported in App Store. I'll explain it popularly. By purchasing a Noname flash drive on some Chinese site, you risk that it will only download photos from you. iOS is a very closed system and even an official Apple accessory is not jailbreakable. Camera Connection Kit loses the lion's share of its functionality.
AData did a very (cleverly) smart thing - they released their own program in the App Store, which greatly expands the functionality of the drive. When you connect to the flash drive for the first time, you will be prompted to install the program. The next time, the system will prompt you to open the program. Very good and useful.
What you can do through the built-in program:
- transfer photos and videos from phone memory
- backup contacts
- create folders (that is, you can scatter files among them)
- copy, cut and paste files
- watch photos and videos, listen to music, view documents
I will dwell on the last point in more detail:
The sign from the official website shows the seriousness of AData to capture the market. At first I didn’t believe it, but then I started testing mp3, mkv, avi... The program easily coped with the task. Yes, you don’t even have to copy files anywhere, but simply view them from a flash drive.
Watch video:
Listening to music:
Screenshots from the application:
Files can be laid out on a flash drive as you please. In folder Conductor, you will see the entire file structure.
It would seem perfect! But not really. I identified only 2 shortcomings, and the first one is most likely Apple’s fault.
- The program does not see music due to iOS limitations.
I quote the FAQ:
Apple does not allow content to be moved directly from/to iTunes from iPhone devices or other iOS devices. However, most songs can be moved to i-Memory UE710 using Mac computer or PC and then listen. All new songs from iTunes can be played. A small number of older songs are still protected by the service's stricter DRM (Digital Rights Management) rules and can only be played properly on iTunes.
My program did not see either licensed purchased music or pirated mp3s uploaded to the phone. So you can only download music from a PC or Mac and listen to it from a flash drive, but not import it in any way.
2. Sometimes viewing files with the built-in program does not satisfy me, but opening the file in another program is not possible.
a) I want to watch a movie, but there are 3 in file audio tracks. The built-in program, with all due respect, takes only the first track.
b) I look at the PHP file, and the program says that this is an unsupported type. OK. But how can I open it with another program?
Fortunately, small files can be sent by mail to yourself, uploaded to Dropbox, or sent by message. But you can't do that with films.
Maybe the developers will add this feature. I already wrote to them about this - it turned out that AData has Russian support. I also gave them a couple of minor but unpleasant bugs with the Cyrillic alphabet. Surely they will fix such a small thing.
Important. About formatting. Out of the box, i-Memory is formatted in OS X Extended format. I recommend immediately reformatting it to FAT 32. The fact is that your phone and tablet absolutely do not care what format the flash drive is in, but some TVs do not understand the OS X format. I came across this when I recorded a bunch of films for a trip to my parents... So feel free to format it!
A-Data managed to surprise me with its application. Even jailbreak is not necessary for almost full work with additional memory. And the quality of i-Memory UE710 is at a decent level. I recommend it to expand the memory of your favorite Apple gadgets. Nice stuff!
P.S. I took the flash drive as a gift for my younger sister on the condition that I would test it for at least two weeks for review. She dreamed about it, because she loves to take pictures and shoot videos, and her iPhone has only 16 gigabytes of memory. I think it's a wonderful gift. Don't you find it?)
from correspondence with my sister :) 02 July 2010, Odnokrylov Vladimir 0
DDR3 RAM, which has occupied new platforms from Intel and AMD, is acquiring new frequencies. We have already reviewed Kingston's Hyper-X speed kits. Today we will turn to the memory strips produced by A-DATA - the AX3U1600GC4G9-2G set with a capacity of 8 GB and the set AX3U2000XB2G9-2X with a capacity of 4 GB.
Introduction
I continue the line of reviews dedicated to today’s most modern DDR3 RAM; this time we want to talk about the brand that is not yet the most popular in Russia and its neighboring countries - . Strictly speaking, the products of this company are not limited to desktop memory; for example, flash drives with this inscription may also have caught your eye more than once.
But it was the memory modules that fell into our tenacious hands, and even from the lines Gaming Series(G Series) and Extreme(X Series). But more on this a little further, but for now let’s get acquainted with the subjects.
Technical characteristics of A-DATA DDR3 1600G and A-DATA DDR3 2000X
Well, let's start looking at series sets DDR3 1600G And DDR3 2000X from company . The technical characteristics of the modules are as follows:
| Marking | AX3U1600GC4G9-2G | AX3U2000XB2G9-2X |
| Volume | 2x4 GB | 2x2 GB |
| Microcircuits | 16 DDR3 SDRAM chips in FBGA form factor | |
| Design | 240-pin DIMMs | 240-pin DIMMs |
| Nutrition | 1.55 - 1.75V | 1.6 - 2.0V |
| Data transfer rate | 1333/1600(o.c.) MHz | 1333/2000 (os) MHz |
| Delay mode | 9-9-9-24/9-9-9-27 | 9-9-9-24 |
We received two plastic boxes with cardboard inserts, painted in dark colors.
As it turned out, the letters at the end of the series marking distinguish the relationship of the modules to a specific line of memory, G means a game series, and X- extreme series.
Opening the box showed that the trims of different series also have different radiator structures. The arrangement of microchips in each module is double-sided - hence the radiators.
A-DATA DDR3 1600G and A-DATA DDR3 2000X | Test stand
We will test RAM on the following configuration:
| CPU | AMD Phenom II X6 1055T |
| Motherboard | ASRock 890GX Extreme3 |
| Video card | Integrated ATI Radeon HD 4290 (368 MB, Catalyst 10.4) |
| power unit | Tuniq Ensemble 1200 W |
| HDD | WD7501AALS 750GB |
| OS |
Testing A-DATA DDR3 1600G and DDR3 2000X
The manufacturer has special overclocking profiles built into the tested modules of the "extreme" series. Test them, that is, get the same frequencies for us test configuration I didn’t have to - we remind you that the purpose of the test is to check the relevance of high-speed memory modules for motherboards that do not support frequencies above 1800 MHz. Briefly, the information about the modules obtained using :
A-DATA AX3U1600GC4G9-2G A-DATA AX3U2000XB2G9-2XSo during the testing process, we simply compared modules of different series with each other. The tests were carried out in two-channel unganged mode, the modes were set motherboard automatically. Memory operating modes with timings are shown in the table below.
| Marking | AX3U1600GC4G9-2G | AX3U2000XB2G9-2X |
| 1333 MHz | 667 MHz, 9-9-9-24 | 666 MHz, 9-9-9-24 |
| 1600 MHz |
795 MHz, 9-9-9-27 | 800 MHz, 9-9-9-24 |
| 1333 MHz with AMD Turbo Core technology |
638 MHz, 7-7-7-20 | 636 MHz, 7-7-7-20 |
The results of memory speed tests are given below.
We continue to explore the critical low-level characteristics of high-speed DDR2 modules with our all-in-one benchmark suite. Today we will look at modules from the Taiwanese manufacturer A-DATA, the Vitesta series, designed for a frequency of 800 MHz (in DDR2 mode). Information about the module manufacturer
Module manufacturer: A-DATA Technology Co., Ltd.
Module chip manufacturer: Elpida Memory, Inc.
Module manufacturer website: Chip manufacturer website: Appearance module
Photo of the memory module
Photo of memory chip
It was interesting to discover that after removing the radiator (which was a fairly easy and painless procedure for the modules), the appearance of the modules remained quite decent and complete. In particular, both on the radiator of the modules and on the modules themselves there are stickers with Part Number and serial numbers, and in the second case even with the company logo, which the average user is unlikely to be able to see :). Part Number of module and chip
Module Part Number
What’s nice is that the module numbers on the stickers on the outside and inside match (the serial numbers, however, no longer match). However, there is no guide to deciphering the Part Number of Vitesta DDR2 memory modules on the manufacturer’s website. On the module description page, only the main technical characteristics are indicated: the capacity of each module is 256 or (in our case) 512 MB, the modules are based on 32Mx8 microcircuits, operate with a delay value of CAS# = 5 and a standard supply voltage of 1.85±0.1V.
Part Number of the chip
Description technical characteristics(data sheet) 256-Mbit DDR2 Elpida memory chips:Note that the marking of the microcircuits of this module does not somewhat correspond to the official specification given in the data sheet of memory chips. Namely, the marking begins with a single letter “E” instead of the expected letter combination “EDE”, in addition, there is no package type code (“SE” = FBGA packaging). However, we have seen a similar approach to marking Elpida chips before (for example, on Kingston DDR2 module chips), so this is more the rule than the exception. SPD module chip data
Description general standard SPD:
Description of the specific SPD standard for DDR2:
| Parameter | Byte | Meaning | Decoding |
|---|---|---|---|
| Fundamental memory type | 2 | 08h | DDR2 SDRAM |
| Total number of module line address lines | 3 | 0Dh | 13 (RA0-RA12) |
| Total number of module column address lines | 4 | 0Ah | 10 (CA0-CA9) |
| Total number of physical banks of the memory module | 5 | 61h | 2 physical banks |
| External memory module data bus | 6 | 40h | 64 bit |
| Supply voltage level | 8 | 05h | SSTL 1.8V |
| Minimum duration of the clock period (t CK) at maximum delay CAS# (CL X) | 9 | 25h | 2.50 ns (400.0 MHz) |
| Module configuration type | 11 | 00h | Non-Parity, Non-ECC |
| Type and method of data regeneration | 12 | 82h | 7.8125 ms 0.5x reduced self-regeneration |
| Width external interface data buses (type of organization) memory chips used | 13 | 08h | x8 |
| Width of the external data bus interface (type of organization) of the ECC module memory chips used | 14 | 00h | Undefined |
| Duration of transmitted packets (BL) | 16 | 0Ch | BL = 4.8 |
| Number of logical banks of each chip in the module | 17 | 04h | 4 |
| Supported delay lengths CAS# (CL) | 18 | 38h | CL = 5, 4, 3 |
| Minimum clock period duration (t CK) with reduced CAS# delay (CL X-1) | 23 | 30h | 3.00 ns (333.3 MHz) |
| Minimum clock period duration (t CK) with reduced CAS# delay (CL X-2) | 25 | 3Dh | 3.75 ns (266.7 MHz) |
| Minimum time for recharging data in a row (t RP) | 27 | 32h | 12.5 ns 5,CL=5 ~4.2, CL = 4 ~3.3, CL = 3 |
| Minimum delay between activation of adjacent rows (t RRD) | 28 | 1Eh | 7.5 ns 3,CL=5 2.5, CL = 4 2,CL=3 |
| Minimum delay between RAS# and CAS# (t RCD) | 29 | 32h | 12.5 ns 5,CL=5 ~4.2, CL = 4 ~3.3, CL = 3 |
| Minimum pulse duration of the RAS# signal (t RAS) | 30 | 2Dh | 45.0 ns 18, CL = 5 15, CL = 4 12,CL=3 |
| Capacity of one physical memory bank | 31 | 40h | 256 MB |
| Recovery period after recording (t WR) | 36 | 3Ch | 15.0 ns 6,CL=5 5,CL=4 4,CL=3 |
| Internal delay between WRITE and READ commands (t WTR) | 37 | 1Eh | 7.5 ns 3,CL=5 2.5, CL = 4 2,CL=3 |
| Internal delay between READ and PRECHARGE commands (t RTP) | 38 | 1Eh | 7.5 ns 3,CL=5 2.5, CL = 4 2,CL=3 |
| Minimum row cycle time (t RC) | 41, 40 | 39h, 30h | 57.5 ns 23, CL = 5 ~19.2, CL = 4 ~15.3, CL = 3 |
| Period between self-regeneration commands (t RFC) | 42, 40 | 4Bh, 30h | 75.0 ns 30, CL = 5 25, CL = 4 20, CL = 3 |
| Maximum duration of the clock period (t CK max) | 43 | 80h | 8.0 ns |
| SPD revision number | 62 | 12h | Revision 1.2 |
| Checksum byte 0-62 | 63 | B9h | 185 (correct) |
| JEDEC Manufacturer Identification Code | 64-71 | 7Fh, 7Fh, 7Fh, 7Fh, CBh | A-DATA Technology |
| Module Part Number | 73-90 | | Undefined |
| Module production date | 93-94 | 00h, 00h | Undefined |
| Module serial number | 95-98 | 00h, 00h, 00h, 00h | Undefined |
The SPD content looks almost standard. The modules support all three possible values of CAS# signal delay 5, 4 and 3. The maximum value corresponds to a clock period of 2.50 ns (frequency 400 MHz, i.e. nominal DDR2-800 mode) and a completely normal timing scheme 5-5-5- 18. Reduced latency CAS# (CL X-1 = 4) is prescribed for use in DDR2-667 mode (clock period 3.00 ns, frequency 333.3 MHz). Unfortunately, it is not possible to apply integer timing values for this case; rounding to the nearest tenth gives the scheme 4-4.2-4.2-15, which, most likely, will be perceived by motherboard BIOSes as 4-5-5-15 (rounding to larger side for reasons of greater stability). The last, twice reduced value of t CL (CL X-2 = 3) corresponds to the DDR2-533 mode (cycle time 3.75 ns, frequency 266.7 MHz). The timing scheme for this case also turns out to be non-integer 4-3.3-3.3-12 (i.e. in reality 4-4-4-12). The manufacturer code indicated in the SPD, which is pleasant, corresponds to reality, however, the data on the date of manufacture, Part Number and serial number are missing and this already doesn’t produce much good impression. Test bench and software configurations
Test bench No. 1
- Processor: Intel Pentium 4 560, 3.6 GHz (Prescott rev. E0 core, 1 MB L2)
- Chipset: Intel 955X, FSB frequency 200 MHz
- Motherboard: Gigabyte 8I955X Pro, BIOS version F5 from 07/05/2005
- Memory: 2x512 MB A-DATA DDR2-800, single/dual channel
- Video: Leadtek PX350 TDH, NVIDIA PCX5900
- HDD: WD Raptor WD360, SATA, 10000 rpm, 36Gb
- Drivers: NVIDIA Forceware 77.72, Intel Chipset Utility 7.2.1.1003, DirectX 9.0c
Performance tests
For a number of reasons, among the motherboards that tested A-DATA DDR2-800 modules, there was only one model: Gigabyte 8I955X Pro. Note that this board is one of the few that supports such fast memory as DDR2-800. As in our previous study, we carried out tests in both the usual dual-channel and single-channel modes in order to show the potential of DDR2-800 modules (in particular, bandwidth) in its “pure form”.
| Parameter | Stand 1 | |
|---|---|---|
| Dual channel mode | Single channel mode | |
| Timings | 5-5-5-15 | 5-5-5-15 |
| Average read bandwidth, MB/s | 5799 | 5770 |
| Average bandwidth per write, MB/s | 2456 | 2393 |
| Max. Read memory bandwidth, MB/s | 6457 | 6333 |
| Max. Write bandwidth, MB/s | 4279 | 4279 |
| 44.0 | 44.0 | |
| 51.7 | 51.7 | |
| 93.7 | 93.9 | |
| 113.2 | 113.4 | |
| Minimum latency of pseudo-random access, ns (no hardware prefetch) | 68.4 | 68.4 |
| Maximum latency of pseudo-random access, ns (no hardware prefetch) | 87.9 | 87.9 |
| Minimum random access latency *, ns (no hardware prefetch) | 94.1 | 94.3 |
| Maximum random access latency *, ns (no hardware prefetch) | 114.2 | 114.3 |
* block size 16 MB
The default timing scheme 5-5-5-15 (Memory Timings: “by SPD”) is slightly different from the scheme specified in the SPD (5-5-5-18). True, we can safely turn a blind eye to this difference, because, as we saw in the next series of tests, the modules in question are absolutely insensitive to the t RAS value specified in the chipset configuration registers, like most other DDR2 modules.
The speed indicators (BRP) of modules in dual-channel and single-channel modes are slightly different - of course, in favor of the dual-channel mode. The largest difference (albeit only 2%) can be seen in the maximum real memory bandwidth test for reading (6457 versus 6333 MB/s). The difference is small, however, in the previous study of Corsair XMS2-8000UL modules, almost no such difference was observed at all. It is possible, of course, that this is due to the use of different processors (Pentium 4 560 and 670) it is very likely that the larger L2 cache of the Pentium 4 670 processor is able to hide differences in memory bandwidth to a greater extent. However, the potential of the considered DDR2-800 “in its pure form” (i.e. due to real bandwidth single channel) also turns out to be quite good.
In addition, one cannot help but rejoice at the very low (noticeably lower, compared to the same Corsair XMS2-8000UL) latency values when accessing memory, even with a standard timing scheme. However, this cannot be directly considered an advantage of these modules over the others; after all, different models of motherboards were used in the tests (and also, most importantly, different BIOS version) and different processors (the influence of this factor is much less likely, but, nevertheless, it should not be excluded). Therefore, the final answer to the question of whether the memory modules under consideration are actually characterized by lower latencies requires additional research.
Stability tests
The timing values, with the exception of t CL, were varied on the fly thanks to the ability built into the RMMA test package to dynamically change the memory subsystem settings supported by the chipset. The stability of the memory subsystem was determined using the RightMark Memory Stability Test auxiliary utility, which is part of the RMMA test package.
To achieve minimum timings, we set the modules' supply voltage to a slightly higher 2.2V. Naturally, the experiment could have been carried out at a standard (for these modules) voltage of 1.85V, but, firstly, the result would hardly have been as indicative, and secondly, it could not be directly compared with the result achieved for Corsair XMS2-8000UL modules.
Minimum timing values that allow you to set the memory modules in question in DDR2-800 mode without losing stability 4-4-4 (attempts to further reduce the t RP and/or t RCD values led to an immediate system freeze). Of course, this clearly falls short of the previous records set by Corsair modules (4-3-3 for the XMS2-8000UL and even 4-3-2 for the XMS2-5400UL). At the same time, you will agree that the ability to set a timing scheme that is more typical for DDR2-533 (standard) and DDR2-667 (in fact) modules looks very good in the DDR2-800 high-speed mode.
| Parameter | Stand 1 | |
|---|---|---|
| Dual channel mode | Single channel mode | |
| Timings | 4-4-4 (2.2V) | 4-4-4 (2.2V) |
| Average read bandwidth, MB/s | 5841 | 5825 |
| Average bandwidth per write, MB/s | 2465 | 2421 |
| Max. Read memory bandwidth, MB/s | 6477 | 6367 |
| Max. Write bandwidth, MB/s | 4279 | 4279 |
| 43.7 | 43.8 | |
| 50.9 | 51.1 | |
| 88.6 | 89.0 | |
| 107.9 | 107.7 | |
| Minimum latency of pseudo-random access, ns (no hardware prefetch) | 67.9 | 68.0 |
| Maximum latency of pseudo-random access, ns (no hardware prefetch) | 87.4 | 87.8 |
| Minimum random access latency *, ns (no hardware prefetch) | 89.0 | 89.2 |
| Maximum random access latency *, ns (no hardware prefetch) | 109.0 | 109.0 |
* block size 16 MB
“Overclocking by timings” brought quite predictable changes to the test results: read bandwidth increased slightly (very slightly), random access latency decreased slightly. The gap between the performance of the dual-channel mode and that of the single-channel mode has narrowed somewhat (the maximum difference in the maximum real read bandwidth is now only 1.7%), which, in general, is also quite natural. Results
The tested A-DATA DDR2-800 memory modules of the Vitesta series have shown themselves to be high-speed modules capable of almost reaching their full potential of this type memory (tests in single-channel mode), moreover, having very low latencies (at least under the conditions of our experiment). The overclocking potential in terms of timings of these modules is also quite good with a supply voltage of 2.2V (typical for modules high-end class“for enthusiasts”) the modules operate stably at 4-4-4 timings, more typical for entry-level DDR2-533 modules and high-end DDR2-667 modules. As in the case of our previous studies, to judge the compatibility of DDR2-800 class memory modules with various motherboards It's too early, because... The boards that actually support such high-speed memory operating modes can still be counted on the fingers of one hand.