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Unable to use posted latency settings with new twinx-3200xl


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I recently upgraded my machine with the following parts:

Abit AS8

Corsair 1024 twinx-3200XL DDR (2-2-2-5 posted latency)

P4 3GHz

Antec 450W PSU


I also have an ATI 9800 Pro video card. No OC'ing.


As part of the upgrade, I reformatted both of my hard drives and made a fresh XP install, flashed my BIOS to latest version, and d/l'd all newest drivers including the intel chipset drivers for my motherboard.


I was getting BSOD's in XP, generally during or after running various games (which happen to be the only resource-intensive applications I run on my computer). The most common error was the IRQL_NOT_LESS_OR_EQUAL one, but I got some others as well at various points.


I started running memtest86+ (memtest86 reboots my machine sometimes when I try to run it) and came up with errors within the first few tests.

After playing around with various settings, I found that setting my latencies to 2-2-3-5 at least allows me to run memtest through test 4 with no errors. I haven't yet received a BSOD running with these settings, but I need more time to feel comfortable saying that the issue is resolved by the latency settings.


The last tweak I tried was changing my AGP V to 1.60 and DDR VDD to 2.70 (they're actually running at about 1.66 and 2.78, respectively). I still get errors within the first 4 tests with the default latency settings, but none with the 2-2-3-5 values. Am I being too picky or should I change in my set? Perhaps there is something else I overlooked?

Thanks in advance for any advice or info. :)

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  • Corsair Employees

Please put the memory module on slot 1 & 3; make sure that you have the latest BIOS for your MB, and set the following settings on your BIOS;

TwinX512 or TwinX1024-3200XL

Advanced Chipset:

Memclock Mode: Limit

Memclock Value: 2:1 (DDR400)

Bank Interleaving: 4/Enabled

Burst Lenght: 4

SDRAM CAS Latency: 2T

SDRAM RAS to CAS Delay (tRCD): 2T

SDRAM Active to Precharge Delay (tRAS): 5T

SDRAM Row Precharge (tRP): 2T


Spread Spectrum: Enabled

CPU FSB Clock: 200

DDR Voltage: 2.7/2.75 Volts

AGP Voltage: Default *unless you have ATI 9200 or 9600 then 1.6 Volts suggested!*

All other settings should be set to default settings!

Then please test them one at a time with http://www.memtest.org and let’s make sure it's not some other issue! I would run the test for at least 2-3 passes to be sure!

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