You shouldn't need that much voltage to run your 6750 at 3.4 honestly. Have you tried anything lower than that? Mine runs at 3.6 at 1.425, and that's the absolute lowest I could set it w/o instability. At 3.4, I was able to get by with 1.35v.
I only say that because you are starting to get to that point where each tick of voltage you can take off will help immensly with keeping your temps under control.
Yikes, yes, on stock cooler, either run it at stock or with a very mild OC. Stock should be able to handle 3.0GHz. Remember to lower the voltage if you do that though For 3.0, you might be able to get away with 1.3 or 1.325. That will help your temperatures drop a ton.
Remember, raising clock frequency increases heat generation linearly, while upping voltage increases heat generation exponentially.
66c is not going to hurt anything, but it is still warm. That's about what mine is running at right now, maybe 1-2c higher at peak during stress. While you might not kill anything, you may shorten it's lifespan I'm not worried about mine, that is why I let it run that warm. This 6750 was an interim O/C project/learning experience until the cheap Penryn quads hit the channel.
Another thing about overclocking. Don't just get it stable and be satisfied. Keep notching the voltage down and stressing it until instability creeps back in. Then, just set it to the lowest stable voltage, and stress it for 24 hous. If it passes, that's your voltage.
Yea, I forgot to mention that detail..... That is a little warm for the cores. It's hot for the Tcase. My cores peak at 67c during small FFT testing. That's still warm like I said, but it is within specs. Like Grimmy said, you want your Tcase sensor no hotter than 60-62.
A more sufficient heatsink is a crucial component to any oc'ed system, but I dont mean to beat the dead horse by saying that. The Thermalright Ultra 120 Extreme is the best cooler I have had experience with, use whatever fan of your choosing that pushes plenty of air (i have a panaflo on mine). With ceramique, my e6300 @3.5 does not go above 60c (both cores active) using intel's thermal analysis tool. If you have the space, this heatsink is one option to consider on top of the list already in the thread.
And whats the ambient room temp? ... I've got a e6750 running at 3.2Ghz using 1.375 volts (can prolly go lower volts but couldnt be arsed) and it averages about 50-55 degrees celcius .. with an ambient room temp of 25-30 degrees on average (room sometimes reaches 40 .. gotta luv two storey houses in australia without a/c)
January 15, 2008 12:18:35 AM
Knightthis - that has to be the longest system specs listing i have ever seen, all relevant also.