woodymemory Posted November 10, 2005 Share Posted November 10, 2005 Hi All, I have a A8N-SLI Deluxe running 2 * 512MB Dual Channal DDR400 memory ( CMX512-3200LLpro and have added another 2 * Dual Channal DDR400 (CMX512 - 3200C2Pro. When I use 1 pair the speed is DDR400 128 bit. My problem is when all four sticks are used the machine reports DDR200 128 bit at post. Is this normal? Am i geeting have the bandwidth? would it be faster to use 2* 1GB? thanks Link to comment Share on other sites More sharing options...
Wired Posted November 10, 2005 Share Posted November 10, 2005 It's never recommended to mix modules of different part types, as the newer chipsets can't handle it. 2 matching sticks of any size versus 4 non-matching sticks would definitely be better. Link to comment Share on other sites More sharing options...
RJLeong65 Posted November 10, 2005 Share Posted November 10, 2005 Hi All, I have a A8N-SLI Deluxe running 2 * 512MB Dual Channal DDR400 memory ( CMX512-3200LLpro and have added another 2 * Dual Channal DDR400 (CMX512 - 3200C2Pro. When I use 1 pair the speed is DDR400 128 bit. My problem is when all four sticks are used the machine reports DDR200 128 bit at post. Is this normal? Am i geeting have the bandwidth? would it be faster to use 2* 1GB? Your system is downclocking the memory speed to 100MHz/DDR200/PC1600 due to the fact that you're mixing memory modules of different timings. And the BIOS got confused as to which SPD settings to use, in your case: The 3200LL modules are CAS 2-3-2-6, while the 3200C2 modules are CAS 3-3-3-8 (based on SPD programmed values). The mixed timings will make the entire system default to fail-safe settings (100MHz/DDR200/PC1600 memory speed and CAS 3-4-4-8 timings) in order to protect your PC. Link to comment Share on other sites More sharing options...
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