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are you trying to run at 1:1 with the memory..that would be 290mhz..if so loosen the memory timings to 3-4-4-8 or use a divider
also crucial ram as I recall is not voltage hungery so it could also be the increased vdimm
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I followed ZEBO'S quick and dirty guide
set mem to ddr200, then clocked up @stock vcore or auto which my board had at 1.4 ?
at 290 stock vcore failed prime core0 right away, 1.5vcore failed prime after 10 minutes core0 54c
From there i tried the memory got 215@2,2,2,6 stock vdimm2.6v
260 @2.5,3,3,6 stock vdimm2.6v or 275 @2.5,3,3,6 2.9vdimm
so I settled in at 274=2466mhz with 1:1 ram ddr 548(2.5,3,3,6 1t) 3 hrs prime at 52c