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Old February 6, 2011, 10:14 PM
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Default i7 860 4ghz, RAM stability?

Hello everyone,

I am running my i7 860 on an asus p7p55d pro. I previously had a 3.8ghz OC with 200x19 Vcore I believe was around 1.375. HT on.

After checking some benchmarks online I decided to turn HT off and go for some extra mhz for gaming reasons.

The thing is I lowered the ram to about 1200 but kept all other settings the same, and had several hours of prime saying that my 4.0ghz was stable. When I brought the RAM back up to 1600, the system failed prime. my RAM timings are all set to their recommended timings and voltages (1.65v C8) and the IMC volts are pretty high at 1.36 or so (one notch above 1.35). The ram also seemed very stable at those settings at 3.8ghz cpu.

What should I be increasing here? Prime blend tests don't push the system beyond 77 deg C.



Last edited by mattnum; February 6, 2011 at 10:20 PM.
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Old February 6, 2011, 10:49 PM
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What's your qpi/vtt set to?

EDIT: or is that what you mean by the IMC voltage?
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Old February 7, 2011, 01:16 AM
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by imc voltage he means vtt

matt try runnin around 1800-2000mhz 9-9-9-27 trfc 120
you should hit 4.0 no ht pretty easily

better yet get some better ram
maximus IV extreme @ 5.1 1.41v

evga e760 +920 4.8 water5.0+ on phase linx stable
gtx285 tri-sli
dfi ut-p35 lt
e8600@4.6 1.38v
too much ram
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Old February 7, 2011, 05:55 AM
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I keep mine at 3.8 and run the ram at 1800 with no problems......not worried about that extra .2
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Old February 7, 2011, 06:19 AM
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that makes no sense he can't get it stable at 1600 so turn it up passed it max setting if you have all slots filled that may be why i myself am having the same problems cause the more ram you got the more the imc has to do and not all i7 860 can do 4.0ghz easily. but i can tell ya that there almost no difference in games between 3.8 and 4.0. i have had 4 or 5 920 setups this year and now have moved on too 1156 chips and there's really not a big difference in the higher end models. with that said try upping your ram voltage one point at a time as-long as your within .5v of the imc your good

or run out and by better ram so you can see it only in benchmarks if that's what your going for then sure but you should be able to work this out with the ram you have
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