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post #11 of 22
I have a 990x that i have set up for 24/7 @4.5ghz, 50% loadline calibration, and in idle it goes to 1.382, load is 1.349v according to cpu-z and ROG Connect software. Is that considered safe? After one hour of prime temp dont go above 70C, room temp being about 25C. I could probably use full loadline calibration to get lover idle vcore, and than for it to rise under load, but after some reading on the net, im confused about using loadline calibration. What do you think about it?

And i also read that it is actually a combination of high vcore and high qpi/dram voltage that is harmfull to the cpu. What would you consider a 24/7 safe vcore on watercooling (if given a 1.25 qpi/dram, thats how much i need for 1804mhz ddr3, if uncore is 3608)? Honestly, I expected more than 4.5ghz 24/7 out of this chip, at least after all the things i read on the net prior to the 990x release.

I also have G Skill Trident DDR3 2000mhz 6gb 9-9-9-24-1t kit, and if i use uncore at 4000, it just starts to loose sticks, reading 4 or 2gb of ram, no matter how much qpi/dram i give it. On the previous cpu, the 930, it worked at stock speed, but with qpi/dram being 1.52v for 4.2ghz.

Really need help, I would like to get more out of this chip, in some reasonable voltages.
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post #12 of 22
Intel rates Gulftown QPI limit @ 1.35V and Vcore @ 1.45V as long as you keep temps in check. Anything above that and you might start to see degradation. Those are the voltages I run my 990x at under chilled water.
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post #13 of 22
Quote:
Originally Posted by Tomo VK View Post
I have a 990x that i have set up for 24/7 @4.5ghz, 50% loadline calibration, and in idle it goes to 1.382, load is 1.349v according to cpu-z and ROG Connect software. Is that considered safe? After one hour of prime temp dont go above 70C, room temp being about 25C. I could probably use full loadline calibration to get lover idle vcore, and than for it to rise under load, but after some reading on the net, im confused about using loadline calibration. What do you think about it?

And i also read that it is actually a combination of high vcore and high qpi/dram voltage that is harmfull to the cpu. What would you consider a 24/7 safe vcore on watercooling (if given a 1.25 qpi/dram, thats how much i need for 1804mhz ddr3, if uncore is 3608)? Honestly, I expected more than 4.5ghz 24/7 out of this chip, at least after all the things i read on the net prior to the 990x release.

I also have G Skill Trident DDR3 2000mhz 6gb 9-9-9-24-1t kit, and if i use uncore at 4000, it just starts to loose sticks, reading 4 or 2gb of ram, no matter how much qpi/dram i give it. On the previous cpu, the 930, it worked at stock speed, but with qpi/dram being 1.52v for 4.2ghz.

Really need help, I would like to get more out of this chip, in some reasonable voltages.
980x/990x only needs to have uncore minimum 1.5x the dram frequency, so you could lower the uncore frequency & voltage along with it.
The gulftown extreme cpus are actually pretty good for being able to run high frequency memory. Losing memory when clocking the uncore higher is a sign of not enough uncore voltage, 990x still takes quite a bit of juice to get to 4Ghz.
    
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post #14 of 22
my 990x is @ 1.34v 4.4ghz. and my temps are at 35-39C is that fine?
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post #15 of 22
It's the loaded temps that really matter, but looks OK for those clocks at that voltage.
    
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post #16 of 22
Quote:
Originally Posted by FtW 420 View Post
It's the loaded temps that really matter, but looks OK for those clocks at that voltage.
whats the best way to load test my cpu?
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post #17 of 22
Quote:
Originally Posted by rejamerah View Post
whats the best way to load test my cpu?
Download Prime95 or Intel Burn Test.

12+hours your for the most part stable.
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post #18 of 22
Thread Starter 
Time to revive this thread for awhile. I have found that the 990x overclocks very nicely, but me 4.6 seems to be the safest, most stable, and overall best performing OC. I have ran into an issue however that affects ati users, specifically the hd5870. It seems that almost any OC degrades performance. This effect scales with the increase in OC as well. In other words, the faster I push my processor the crappier my hd5870s run.

I have found a way around this but it sucks, just plain sucks and is the weakest work around I have ever tried to use. Basically I have to OC via bclk and that's just no damn fun at all. However, my hd5870s scream under these settings. I was running 59 frames with my CPU @ 4.6 under cinnecbench. With multi set to 20 and bclk at 200MHz for 4.0GHz cpu I get 77.8 frames in cinne! Folks, that is some serious business.

So I ask does any one know a way around this hd5870 problem, perhaps via the pcie frequencies?
post #19 of 22
There is no room for debate in terms of 990x vs 2600k clock for clock, as both CPUs at same speeds, the 2600k will crush the 990x in all clock for clock benchmarks. However, 990x has more threads and cores, so it will stomp SB in any multithreaded benchmarks. Whats there to debate?
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post #20 of 22
Quote:
Originally Posted by L36 View Post
There is no room for debate in terms of 990x vs 2600k clock for clock, as both CPUs at same speeds, the 2600k will crush the 990x in all clock for clock benchmarks. However, 990x has more threads and cores, so it will stomp SB in any multithreaded benchmarks. Whats there to debate?
There was no debate, this is a 990x knowledge thread, not comparing 1366 to 1155.
    
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