doughick Posted December 17, 2005 Share Posted December 17, 2005 I recently installed two sticks of 512x2 (Corsair D400 VS1GBKIT400) on my Intel 865Perl Mb and, with the bios memory settings set to auto, it shows the new ram running at 333mhz. From other post on this forum I read this is due to the Intel board wanting the ram to run at the same frequency as my processor. I have tried to overide the bios settings and force the memory to run at 400mhz (even with the slowest cas settings) but get the "Serial Presence Detected-SPD device data missing or inconclusive" and the system sets the ram to run at 266. Can you help me troubleshoot? Thanks Link to comment Share on other sites More sharing options...
RJLeong65 Posted December 17, 2005 Share Posted December 17, 2005 I recently installed two sticks of 512x2 (Corsair D400 VS1GBKIT400) on my Intel 865Perl Mb and, with the bios memory settings set to auto, it shows the new ram running at 333mhz. From other post on this forum I read this is due to the Intel board wanting the ram to run at the same frequency as my processor. I have tried to overide the bios settings and force the memory to run at 400mhz (even with the slowest cas settings) but get the "Serial Presence Detected-SPD device data missing or inconclusive" and the system sets the ram to run at 266. Can you help me troubleshoot? Thanks I've just looked at your system specs, and you're out of luck trying to run your memory at DDR400. You have a "533MHz" FSB processor, whose actual FSB clockspeed is only 133MHz. But DDR400 memory is actually clocked at 200MHz! What's more, the 67MHz differential between the actual memory clockspeed and the processor's actual FSB clockspeed is out of spec for Intel's DDR1 chipsets. As per Intel's spec, you can only run your memory at DDR266 or DDR333 with your CPU. And Intel's D865PERL motherboard offers very minimal CPU FSB overclocking capability; the maximum FSB that you can set for your particular CPU is 138MHz (QDR552). The only way that you can run your memory at "400MHz" (DDR400) is if you have an "800MHz" FSB processor. Link to comment Share on other sites More sharing options...
doughick Posted December 17, 2005 Author Share Posted December 17, 2005 I was afraid you were going to say that. I've been lurking on Ebay looking for a P4 3.4e. Thanks for the help. Link to comment Share on other sites More sharing options...
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