gosmeyer

SYF_Karma

I'll join the club

I have 12gb of corsair DDR3 2000mhz C8

running @ 1866mhz, 1.7v, 8-8-8-24

dexster

well done
is that on 1t ?

i must admit overclocking with 12gb is where the fun is at... still waiting on my watercooling for more fun

SYF_Karma

yer i was contemplating one of those corsair blocks

muttly

Okay, installed 2 x Corsair Dominator GT C7 6GB kits for 12 GB on a i7 920 D0 @ 4.2GHZ @ 1.375 VCore at 7,7,7,20,79,1T 2000MHZ

All good and 32M Prime stable. Today moved to 980X different game! would not run 12GB @ same timings tried different combinations of VTT and VCore, could not get 12GB to run @ 4.4GHZ VCore 1.35, 2000MHZ with loose timings ended up pulling out 6GB so 6GB only now runs at 7,7,7,79,1T 2000MHZ VDimm 1.67 @ 4.4GHZ.

Weirdness is Everest reports 20K read 18,5K write speeds, copy @ 19K, latenecy at 39.9NS much lower than previous speeds? and seems to be the same no matter what mem settings or speed I run?

Any suggestions, ideas, to get 12GB running at 2000MHZ with 980X.

Somethng is up with Everest and memory controller on 980X?

eva2000

maybe uptime to everest latest version for 980x support Everest Ultimate 5.50.x Released

As per anandtech reviews, latencies of cache are a tad slower clock for clock on 980X compared to bloomfield core i7 9xx series. But yes could be differences in mem controller quality on 980X. Basically, you need to retest for optimal settings for your memory for a new cpu as it may not be same optimal settings as previous cpu used. Might help some Intel Core i7 980X - guide to optimal cpu vtt & vdimm voltages Uncore to Memory frequency ratios

muttly

Tried the new beta 2119 of Everest 5.50, no difference?? Super PI 1M is at 4.4GHZ, 09.282s 6 GB @ 7,7,7,20,1T, will try again today for 12GB stability, I am convinced that it is the memory controller that is the issue. Should I increase VTT, currently at 1.5V? or VCore @ 1.35V?

muttly

Okay reached the following, temps are sub 40C and VCore looks okay so will try for 4.8G

Attached Images

4.6G, 6,6,6,18,1T [1024x768].jpg (80.0 KB, 9 views)