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P5W DH Deluxe + TWIN2X2048-6400C4 issue


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I’m having problems with my Corsair TWIN2X2048-6400C4 memory kit. Memtest86+ and Memtest Windows return errors when my memory is running at 667MHz or 800MHz. When I manually set the DIMM frequency to DDR2-533MHz (FSB:DRAM = 1:1), both Memtest versions pass the tests without errors. Despite the Memtest errors at 667Mhz or 800MHz, the system, windows and games run just fine.


Luckily I have a friend at a local store who lend me a pair of Cr*c*al 1GB DDR2 PC5300 CL5 modules, which don’t return errors in Memtest86+ when running at 667MHz. Is this a memory-, motherboard- or BIOS settings problem?


Note: the Asus P5W DH Deluxe has the latest 1707 BIOS.

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  • 2 weeks later...

Sounds good, but I need my computer for school and work. Shipping the memory from Holland to the US takes some days, testing takes a few days and shipping new modules to Holland also takes some days. This can take up to two or three weeks, which is quite long when you really need a computer. Is there another way, sending a proof of purchase for example?


Ps. when reading your posts, the memory should work just fine (without memtest86+ errors) at 677MHz and 800MHz?

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When I set the frequency to 667, I get several memtest errors. These are the memtest results at different frequencies:


  • 533MHz: no memtest errors
  • 667mHz: errors appear periodic
  • 800mHz: a lot of errors appear

CPU wasn't overclocked and Legacy USB was disabled.

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