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Cannot change memory timing of XMS3700 in Asus P4C800-E Deluxe


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I'm running two CMX256A-3700 memory modules in an Asus P4C800-E Deluxe (Rev. 1.02, BIOS v.1019) in Dual-Channel-Mode. There are no other modules installed. The memory is running with wrong timing settings, but i can't change them!

Memtest86 and CTIAW (ftp://ftp.heise.de/pub/ct/ctsi/ctiaw.zip) tell me, that my RAM is running at 2.5-3-3-6. Since the recommended timings for XMS3700 are 3-4-4-8, i set "Configure DRAM Timing by SPD" to "Disabled" and manually set the timing to 3-4-4-8. Unfortunately, it did't work. My RAM is still working at 2.5-3-3-6. What am i doing wrong?


Thanks for your help!

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I forgot to mention that i have major problems with my memory.

Memtest detects lots of errors, Windows behaves strange and especially newer games like HL2 crash very often.

My memory runs at 200MHz, nothing is overclocked, and i have set all the recommended settings in the BIOS, like performance-mode to standard-mode, VDimm @2.75V, USB Legacy Support Off, etc.

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