I have a i5-750 and recently bought a CORSAIR CAFA70 120mm Dual-Fan CPU Cooler. Trying to OC to 3.8-4.0Ghz but my temps seem really high. I currently have the vcore voltage at 1.2 running at 3.6GHz and my idle temps are around 34C and load temps are are around 64C. If I turn up the vcore and push the speed past 3.6GHz my load temps jump up over 75C. I used AS5 thermal past when I installed the cooler. Is there a chance I don't have it installed tight enough or incorrectly? Rest of the system specs are:
I also have the fans on the cooler where I'm pulling air from the top of the case(PSU is top mounted blowing down) down on the GPU. Should I switch this?(I had wanted to have the fans blowing from the bottom up but installed them backwards)
I'm pretty new to OC'ing so some help/pointers/advice would be greatly appreciated!
Edit: Forgot to mention my core temps vary 5 degrees is this normal?
First, PSUs suck air in the bottom and blow it out the back (or front in some case designs) of the system. Are you saying that your heatsink fan is facing the fan on the PSU? If so, you are creating a shortage of air available to blow through your heatsink. You want your air to flow out the back of the case or into the power supply.
Well its a push pull dual fan cooler and yes I think the pull fan is facing the PSU. Did I possibly install the cooler sideways? I will try to post some pics later tonight when I get home from work. Hmm just read on reviews that you can install east-west or north-south. I will try to switch it to east-west, not sure if my ripjaws memory is allow that or not. If i can get it flipped east west I might be able to put back in one of the 80mm window fans as I had to remove both of them to get the case to shut after I installed the cooler.
It is all about airflow. You want all of your fans flowing air in the same direction. Most cases/configs pull cool air through the front of the case and exhaust hot air out the back. Placing your HSF fans so they can blow air out the back of the case will take advantage of this typical airflow. You can do the same blowing hot air into your PSU and letting the PSU exhaust the hot air, but that will add stress to your PSU.
Last, double check that your HSF fans aren't working against one another.