Motherboard corrupting memory?

RobFDB

Member
Aug 15, 2001
107
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I posted this on the technical support forum, but have only had one reply.

Over the last few months my system has slowly been becoming more and more unstable. Games would just exit to desktop for no reason, and CS would crash periodically giving memory errors saying "Location 0x3dab352 could not be read etc". At the time i was running 2 x 512mb CMX512-3200C2PT (platinum series) sticks on a Asus A7N8X Deluxe (not sure on the rev, but i know its not a rev 2.0 board) in dual channel mode.

Prime95 would only run for a minute max, if that, before spitting out an error. I downloaded and ran Memtest86 on just stick A, in single channel mode, and it came back with 11 errors: 6 in test 5, 5 in test 6. I tested stick B under the same conditions and it came back with 4 errors, all in test 5. I left stick A out of the system and continued to use just stick B on its own. Altough my system now had half the RAM it now ran with alot more stability (prime95 for about 10mins before i cancelled it and games didnt crash on me).

However now my systems stability has taken a nose dive. Prime95 runs again for only a minute if that. I re-ran Memtest86 on stick B and its come back with more errors, alot more. 11 in test 4 and 42 in test 5 and ofc games are now just as unstable. The memory is being run at 2-2-2-6, normal voltage but only at 166mhz, as im running a Barton 2800+ and the memory has never been overclocked.

In light of the new errors on stick B is it safe for me to assume that this is all down to the motherboard? Apart from obviously replacing the motherboard is my memory now also screwed, so that i have to replace that too? In case anyones wondering no, i cant RMA any of it. Suggestions/solutions very, very welcome.
 

piasabird

Lifer
Feb 6, 2002
17,168
60
91
With the A7N8X rev 1 boards some of them had stability issues with certain kinds of RAM and certain revisions of the BIOS. I dont recall, but there is probably one specific BIOS Version which gets the best results. This may be a case where a BIOS Flash may be warranted. Asus motherboards can be picky when it comes to the brand and type of RAM used.

If you are or have been overclocking, that may be an issue.
 

RobFDB

Member
Aug 15, 2001
107
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Nope never overclocked this system. My old Asus A7V266 (KT266) used to only run 1 stick of ram.. using 2 caused memory errors in the NTKernal on boot up. If i replace it, which i may have to, i'll probally switch to the NF7-S but before that i'll follow you're suggestion and try some of the older bios, cheers.
 

RobFDB

Member
Aug 15, 2001
107
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I've test now with 3 other bios versions, 1004, 1006 and 1007 (was using 1008). Stick B is showing less errors now, 1 in test 4 and 2 in test 5 under the 1007 bios. I retested stick A however more errors cropped up, this time in test 3. I have also tried adjusting the timings, from 2-2-2-6 to 2-3-2-11, but that made no difference either.
 

AWhackWhiteBoy

Golden Member
Mar 3, 2004
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those crummy Asus boards are horrible to get reasonable stability with dual channel and most ram. i had all kinds of issues with it(i could never get it to properly run 200fsb). try putting the ram in single channel mode by placing both sticks in the two ram slots that are very close to each other.

either that or throttle back the FSB to 190 or 195.