mercatordesigns

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Oct 4, 2007
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18,510
System Specs:

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 5.5.5.15 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 4.4.4.8 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.

Thanks,
Merc.
 

mercatordesigns

Distinguished
Oct 4, 2007
4
0
18,510
Edit: Also forgot to mention we tested both boards with 2 seperate matched pairs, both revision 2.2. Also testing both boards with the 1 set of revision 1.2. Just for clarification :)