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Asus P4P800SE timing issue


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I tried to install 2 sets of Twinx2048-3200PT and the machine will not boot (I get about 2 sec of power before it shuts down).


Asus TS said it's a timing issue and that I should get the proper setting to manually set the timing in the BIOS.


Where can I find this information?





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Test one stick at a time in each slot using Memtest86+.


Try these settings:


Disable Legacy USB support

CAS Latency (tCL): 2

RAS to CAS Delay (tRCD): 3

Row Precharge (tRP): 3

Active to Precharge Delay (tRAS): 6


Memory Voltage: 2.7-2.8 Volts (Warrantied up to, but not over, 2.90 volts)

All other settings to defaults.


Source: Corsair XMS Qualification and Testing Information


Also, what is the version # of each pack?

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I have 2 of the modules working in the A slots at the stock 3-3-3-8 (the mb is still on auto setting). I'm going to leave well enough alone until Monday when the various TS offices are open again.


The revision is XMS3200v6.1 on all four modules


I have to image a CD for memtest.


Why is it that the B bank is the problem, if it is? All four slots are set the same.


Are the settings in anyway overclocked? I'm not looking for more speed, other than that which I get by having 4GB v. 1GB. Right now everything seems faster. :biggrin:


Thanks again,



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Nothing is ever simple.


The modules are fine, the stock timing is fine.


Adding the 4 modules blew out my power supply. I was running a 300W, changed it to a 450W and everything in running.


Is there any reason to change the timing to your recommendations?

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