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Cmx512 -- 2700c2


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I recently bought two sticks of CMX512 ram. One works fine. The other one failed memtest32 tests from addresses 510MB-512MB. My current configuration runs windows 2000 professional SP4. The system has crashed (blue-screen) from pagefaults. Various software (halflife, adobe photoshop) have also crashed during use.


System Specs:

AMD Athlon 2100+ XP (1733MHz)

Asus A7v333

3x CMX512 -- 2700C2 (1 old, 1 new, 1 new broken)

Nvidia Geforce4 4600

Creative SoundBlaster Audigy 2zs

various Maxtor harddrives (Diamondmax8,9 80GB, 120GB, 160GB)

Pioneer DVR-107d


What do you guys recommend I do? Also, in the meantime, is there any way I can configure win2k not to utilize that segment of ram while I'm resolving this issue?



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I just ran multiple tests, and the results seem to point to a problem that is not the ram itself.


test specs:

ASUS A7V333 BIOS Revision 1004 (03/08/02)

CPU speed 1733MHz

CPU/PCI Frequency 133/33

SDRAM CAS Latency 2.5T


SDRAM RAS Precharge Time 3T

SDRAM Active Precharge Delay 6T


Tested RAM:

R1 - CMX512 -- 2700C2 XMS2701v1.1

R2 - CMX512 -- 2700C2 XMS2702v3.1

R3 - CMX512 -- 2700C2 XMS2702v3.1


test methods:

Using Memtest-86 v3.2


All individial sticks of ram tested fine in each of the three dimm slots (9 tests)


All sets of two sticks of ram (R1/R2, R1/R3, R2/R3) tested with no errors


However, regardless of what order the ram was placed in the dimm slots, when all three sticks were installed, test #5 failed from 512-1024.


For the individual tests, 5 passes were performed each

For the tests with two sticks of ram, 5 passes were performed each

For the tests with all three sticks of ram, 3 passes were performed each


My conclusion is my ram is fine, but there is either a failure on the mainboard, or an issue with architecture. I'm attempting the tests again with an updated bios version [1018.004 (beta build)]

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  • Corsair Employees
That could be a possibility, I will also check your PSU, make sure that you get enough juice or power (450 watts or above), but if you decided to get your modules replace, please let us know we will be more than happy to replace it.
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What really dumb luck! :mad:


I attempted to flash the BIOS to the newest build, but the flash failed. I was unable to get the board to recognize the power on request..


Asus technical support believes I may have a corrupt eeprom and have requested that I ship it to them so they can take a look at it. In the meanwhile I just have a really big paperweight until they ship me a replacement.


d2k :[pouts:


P.S. in response to the PSU, I have an Enermax 451W PSU.

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  • 2 weeks later...

I finally got my eeprom back today.


Now running revision 1017.


I'm still getting the same problems when I diagnose the ram with memtest32.


I called Asus, and they said it is probably a problem with the ram settings. Can you tell me what the optimal settings for my board would be?


I tried running the default 2.5,3,3,6 but the second dimm slot fails memtest test #5. When I attempted to run at 2,2,2,5 the system froze (even when I only used the 2 new sticks). System seemed to work fine in the 2,2,2,5 setting when I only used 1 stick of ram.


The BIOS allows the following settings:


SDRAM CAS Latency [2,2.5]

SDRAM RAS to CAS Delay [2,3]

SDRAM RAS Precharge Time [2,3]

SDRAM Active Precharge Delay [5,6]

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Thanks RAM GUY and Wired!


The default dimm voltages for the ASUS A7V333 are 2.7v

Following the instructions @ http://www.asusforums.org, I lowered the RAM setting to 2.5v


The computer fails to boot at 2,2,2,5 settings, but if I set to default 2.5,3,3,6 the system runs perfectly. Under this configuration, the system went through 5 passes with memtest-32 v3.2 with 0 errors.


However, now I have a dilemma of performance vs capacity.


If I run with 3x512 @ 2.5,3,3,6 I can obtain speeds of roughly 500MB/s

With 2x512 @ 2,2,2,5 I get a little more than 700MB/s


Under the current set of software I run, the system uses 700-900MB of RAM.


Which decision would you guys recommend? Better performance, or more capacity?

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