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Help using DDR3-1866 (PC3-15000)

V

Venom 2099

Junior Member

I have the Asus P5E3 Premium X48 motherboard (latest bios) and a QX9770. I got some DDR3-1866 memory to use with this and I can't get it to work right (get the bios setup) the memory is specd at 8-8-8-24 and 1.9V (its Patriot PVS32G1866LLK).

While I could post using 8x, 400Mhz and PC3-1600 vdimm 1.9v settings at 9-9-9-24 whenever I ran memtest86+ it would fail, always on test 7 within a min or so. I was able to setup the bios at 10x, 333Mhz, PC3-1066 vdim 1.5v settings and 7-7-7-21, and in this configuration it has been 100% stable, all memtests pass and I ran p95 stress test for 19hrs. No problem.

I would like to run the cpu at 4ghz (air cooled) and the memory at 1866 since that is what it is rated for. Any suggestions? Is the memory just not compatible with my system at the higher spec? Should I return it and try something else, or is just a matter of finding the magic bios config settings?
 
If the RAM works 100% at lower specs than advertised, but does not work at advertised specs, then return it. If this is that case then it's most likely the ram that's at fault, not your motherboard (unless your mobo doesn't like certain DRAM:FSB ratios, in which case it is all about finding those magic numbers)



The real question is what kind of FSB are you going to run realistically, and will the RAM run at that realistic FSB.


 
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