F3-2133C9D-16GXH + Gigabyte GA-Z68MA-D2H-B3 + i7-2600K
Bios version F10 and tested on U1C (UEFI) both work.
XMP1 or XMP2 profiles did NOT work for me. I could not get memory frequency higher than 1600 without customized memory settings with this hardware setup.
Basically i put in some really conservative numbers everywhere to start and then i put each setting back to the lower of XMP or Auto Default until it wouldnt start up anymore. I eventually found the culprit.
In order to get to 2134 memory freq w/o changing voltages and with tighter timings than rated 9-11-11/31:
Use white ram slots furthest from CPU (older 8gig model blue Ripjaws in pic)
Key settings:
These are probably main cause that XMP doesn't work because these are way off and the reason you might not get past 1600 memory freq
tRFC = 235 for me (start at 255MAX and work down) 225 for me caused a very bad bios crash (basically the bios automatically revert to a "Safe" setting, which would be too low tRFC for even a lower memory freq to get even get back into the bios to correct it) and I had to basically reset bios and unplug everything to get the comp to turn on again. This refresh rate increased quite a bit coming from a comparable Gskill 8gig DDR3 pair.
CMD Rate = 2
Bios version F10 and tested on U1C (UEFI) both work.
XMP1 or XMP2 profiles did NOT work for me. I could not get memory frequency higher than 1600 without customized memory settings with this hardware setup.
Basically i put in some really conservative numbers everywhere to start and then i put each setting back to the lower of XMP or Auto Default until it wouldnt start up anymore. I eventually found the culprit.
In order to get to 2134 memory freq w/o changing voltages and with tighter timings than rated 9-11-11/31:
Use white ram slots furthest from CPU (older 8gig model blue Ripjaws in pic)
Key settings:
These are probably main cause that XMP doesn't work because these are way off and the reason you might not get past 1600 memory freq
tRFC = 235 for me (start at 255MAX and work down) 225 for me caused a very bad bios crash (basically the bios automatically revert to a "Safe" setting, which would be too low tRFC for even a lower memory freq to get even get back into the bios to correct it) and I had to basically reset bios and unplug everything to get the comp to turn on again. This refresh rate increased quite a bit coming from a comparable Gskill 8gig DDR3 pair.
CMD Rate = 2
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