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Identical Motherboards: Asus P5N32 E SLI Bios updated to newest (1205)

Identical Processors: Intel Core 2 Duo E6850 running at stock 3.0ghz

Identical Ram: 2gb Corsair Dominator series 1066, running at stock timings at stock voltage 2.1v


The Problem:


We keep getting extreme failure when running memtest86 on 2 seperate machines running the same motherboard. The problem happens when we use a newer revision of the Corsair dominator ram. We have revision 1.2 which runs at 2.2 voltage. This ram will run in any memory slots. 1 and 3 or 2 and 4. No errors at all. The problem is when we try running our newer dominator ram. Revision 2.2 which runs at 2.1v. The ram will run perfectly fine, with absolutely no errors in memtest86, when the ram is is slots 2 and 4. However, when trying to run the ram in slots 1 and 3, memtest86 goes crazy with insane amounts of errors. Running the sticks one at a time in either slot 1 or slot 3 results in zero errors. Running the ram together in duel channel mode in slots 1 and 3 results in the errors. Running it in slots 2 and 4 results in no errors and the system runs great.


My question:


What is causing this? You could essentially think either the motherboard or the ram. Seeing as the motherboard will run the ram fine in slots 2 and 4 but not 1 and 3, yet at the same time the revision 1.2 runs fine in any slot. <-- which makes me lean more towards the ram.


Could it be something with the inline configuration?


The newer ram is using a different chip. Could it be something faulty in either or??


Im looking to understand the situation better, possibly solve it, but my big issue is not understanding whats possibly happening to either the motherboard or ram, which is causing the errors.


The settings for the ram are on default, I adjust the voltage to spec, and enable SLI Configuration at cpu 0% so that the ram will read at the full 1066 instead of 800. Could this be causing it? If so why? the ram is SLI certified, and designed with EPP. If so, how would I adjust the ram manually to get the 1066? (and please dont say, run it at 800 with a timing, its a machine that is going all the way across the country, into the hands of a person who cant even find this webpage let alone be able to follow along in the bios if something happens.) Im just slightly confused with the memory to cpu ratio that you have to adjust to get the full 1066.


Any help would be appreciated.


p5n32 e sli bios 1205

dominator xms2-8500 1066 ver 2.2

evga 8800 ultra

coolermaster 1000 watt

cmstacker 830

wd 500 gig

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Please make sure that you have the latest Bios version and then load setup/optimized defaults and set the Dim Voltage to 2.2 volts and then set SLI Ready Memory to CPU 0% and set the CPC/CR to 2T, then test with http://www.memtest.org! If you still get errors, please follow the link in my signature “I think I have a bad part!” and we will be happy to replace them or it! However, if you get errors with both modules that would suggest some other problem and I would test them one up and or in another system or MB to be sure. In addition, with some MB's (Mostly ASUS) you have to disable legacy USB in the bios when running any memory test.
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Like stated above, I have ran memtest86 extensively on multiple memory modules. All settings are set to default at 2.1v as memory specifies, with SLI set to cpu 0%. Like mentioned, the revision number 1.2 runs at 2.2v and so far it will run in all 4 slots. Only the memory revision number 2.2 is the one that will not run in slots 1 and 3. It works perfectly fine in slots 2 and 4. I would appreciate if you reread what I wrote above.




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Do you have 2 modules or four modules or are you using two single modules that are not matched?


And when you changed to the new modules did you load setup defaults and then set the tested settings?


Bottom Line, if the modules will all run and pass one up with http://www.memtest.org its not the modules. If you are trying to run 4 modules I would suggest setting the memory frequency at DDR800 at 2.1 Volts after you load setup defaults and please disable legacy USB when running http://www.memtest.org. In addition, if moving the modules to another slot stops the errors that might suggest the BIOS is not seeing the new modules correctly and I would not suggest mixing these two sets of memory.

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