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** SandyBridge-E Benchmarking **

Would the extra cache on the 3960x cause it to need more voltage for the same clock speed? assuming all else being equal.

Hoping to get my 3930k setup tonight, so looking forward to doing some renders, should be a big leap from my 1090t!.
 
Saundie said:
What are your temperatures like, MR.B? Also, what are your related voltage settings (vdroop etc)? I am curious as I have had to go to 1.38v to get 4.6GHz out of my 3960x. While my heatsink/fan is able to cool it sufficiently, it's still worth trying to get the heat output down if possible.
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Temps are pretty high: 78c @ 100% load for an hour, but thats because i'm using 3 VERY low speed fans (hate fan noise). So i've ordered some faster fans that are meant to be pretty quiet... I know my water cooling setup is definitely capable of under 55c @ 4.6GHz with normal speed fans.
In the BIOS i've set 1.33v, but CPUZ reports 1.375v-ish, dont know which is more accurate. I've not even bothered looking at other BIOS settings yet, i just dumped it straight on a overclocked profile and then turned the voltage down... infact i could maybe go lower. Will do some serious overclocking over the weekend and report back :)
 
got my 3930k setup at 4.6 ghz on air and seems pretty solid so far. Its around twice as fast if not more than ,my old 1090t was for rendering so very happy at the moment. 13.29 score on cinebench 11.5.
 
I'm at 4.9GHz on my 3930K with 1.43v, although under load this increases to 1.47v. Also got 32GB RAM @ 2133MHz... cant complain :) Temps are alright, 70c after 3 hours of Prime 95.

Edit: got the voltage down to 1.40v (goes up to 1.44v under load). Think this will be my 24/7 setting. CPU-Z Validation.

Capture.JPG


Can also get stable @ 5.1GHz but voltage is too high for 24/7 use (1.50v).
 
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Here is mine
51ghz.jpg

Only using an H100 right now, going to build a full w/c setup when I can get my hands on some next gen graphics cards!
Running around 1.4v now with 1.45v under 100% load. Seems to run fine.
 
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Cabbages2011 said:
What RAM are you using mate?
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G.Skill RipJawsZ PC3-17000C9 (2x 16GB kits) model number: 17000CL9Q-16GBZH

Saundie said:
Will running at 1.45v result in a drastic reduction in the life of the processor?
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Doubt it, not if it's just 0.05v higher than recommended and it's cooled well. Unless you plan on keeping the CPU for many years i wouldn't worry about it. I normally run CPU's slightly above there recommended voltage and never had a problem. But then i hardly ever keep a CPU for longer than about 18 months anyway..
 
@ ^JP^ ... was that temp of 79c reached with just CineBench? Because thats very high considering that benchmark only runs for a few seconds... have you ran Prime 95 for a few hours? whats the temps reach then?
 
MR.B said:
@ ^JP^ ... was that temp of 79c reached with just CineBench? Because thats very high considering that benchmark only runs for a few seconds... have you ran Prime 95 for a few hours? whats the temps reach then?
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That max temp was from running wPrime then IBT for ~10min after each other then once I knew it was stable I did the CineBench. I'm not 100% sure that CoreTemp is reading the cores correctly because there is a big difference between cores and the block contact is perfect so either the Intel heat spreader is not making great contact with the cores, the monitoring is off or the type of instructions going to the individual cores is so different that they are not all generating the same amount of heat.

I don't really bother with 100% load for hours on end anymore. It used to bother me if I couldn't Prime95 for 24 hours but now I just do IBT for 10-15min and leave it at that. Not had a problem with anything I run on a day to day basis and the temps don't go over 70ish unless 100% load so I'm happy.

Played a few hours of BF3 for example and only got 65c on the highest core.

As for the question on Voltage. There is an Intel data sheet that I can't seem to find right now but I remember it said 1.4vcore max. So I'm happy keeping it between 1.4 and 1.5 for long term use.
 
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^JP^ said:
I don't really bother with 100% load for hours on end anymore. It used to bother me if I couldn't Prime95 for 24 hours but now I just do IBT for 10-15min and leave it at that. Not had a problem with anything I run on a day to day basis and the temps don't go over 70ish unless 100% load so I'm happy.
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Years ago i used to do the same and dont recommend it :eek:... Problem with doing ~20mins of stress testing is it's not enough to see if it's really 100% stable. In the past i've been able to run Prime for well over an hour only to then get a BSOD. And if it isn't totally stable Windows can sometimes read and write files and install updates that have small errors, and over time it builds up and you end up with a corrupted OS and files that cant be read... i've seen it happen before. Or if something was to ever use 100% load for half and hour or more then you'd likely hit 85+ degrees and overheat or damage something.
 
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