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Asus P5N32-SLI SE Deluxe and TWIN2X1024A-6400/TWIN2X2048-6400 problems


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I have been running my Asus P5N32-SLI SE Deluxe with my TWIN2X1024A-6400 for over a year now and no issues. I just recently (4 days ago) bought a set of TWIN2X2048-6400. I figured they'd work together, since they're the same cas timing and such. When i installed the ram and booted up, i kept getting bsods >.<


So i ran memtest and had a lot of errors. I pulled out the new sticks (TWIN2X2048-6400) my system seemed to have trouble booting into memtest with the old sticks. I let it sit for a while, reseated the old sticks, and ran memtest for 7 hours or so with no errors. I removed the TWIN2X1024A-6400 and added one of the TWIN2X2048-6400 and ran memtest with no errors for 3 hours. Tried the other TWIN2X2048-6400 and it didn't even post bios. (assuming i just had a faulty TWIN2X2048-6400 chip) I added my TWIN2X1024A-6400 and the good TWIN2X2048-6400 and ran memtest and received errors on test 5 and 7.


Are these chips not compatible with each other? Is it a bad idea to run two 512 sticks and two gig sticks together? Please help. >.< Any Info is so very welcome.


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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 2.0 volts (+.2 Volts W/Giga-Byte) and then set the timings manually to the tested settings for the specific module you have and then test the module/'s one at a time 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 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.


If they all pass I would set the memory frequency at DDR667 with all four installed.

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