[Ci7-860]Core Temperature Difference&Only one Core failing

[Kalh]

Hi!

So I started overclocking my system yesterday and I fairly easy reach 3.8Ghz to 4.0Ghz. What is giving me some troubles though is the fact that a) one of the cores has a huge temperature difference compared to the others and b) its usually exactly the core that shows this difference produces errors in Prime95.

Right now I am running this thing on a Vcore of 1.5V which drops down to 1.376 on load. Temperatures shown by Realtemp after 10 minutes with Prime95 are

Core 1: 87 °C

Core 2: 89 °C

Core 3: 81 °C

Core 4: 89 °C

Is there anything you can tell me to ease myself up a bit ? I definitely applied the TIC evenly and made sure the cooler is mounted properly. Anything else I should try fiddleing with ?

 

[tinytomlogan]

Right for starters full specs are needed.

But with temps like that you dont want to be running that as a 24/7 clock, anything above 80c is a no no. I like my rigs below 70c tbph

 

[Kalh]

CPU: Ci7-860

MB: ASUS P7P55D-E

RAM: Crucial DIMM Kit 4GB PC3-10667U CL9 (DDR3-1333) (CT2KIT25664BA1339)@1600 w/ 1.65V

GPU: HD4890

Cooling: Liquid Cooling

Pump: Eheim Universal 1048-790

CPU-Cooler: EK Water Blocks EK-Supreme LT Acetal

Heat Exchanger: Swiftech MCR320 Quiet Power

So thats the specs.

Well I guess there is still some potential in my water loop since I spotted two tubes that are somewhat overbend. I wasnt up to let all the water out and cut the tubes properly in order to restore a proper routing of those tubes. Instead I used cable retainer to prevent the tubes from overbending. Maybe that didnt work out properly and I should look into that again.

But what about that temperature difference between one core and the rest? Is that worrisome? I mean when I let the cpu run on stock values the difference cuts down to about 2°C compared to the other cores. Further is there anything else I can do besides upping the vcore to get the cpu stable at higher frequencies ?

Oh and about the high temperatures in general I've overclocked using this tutorial written by someone with some experience in the field and his opinion is to not let the cpu run any hotter than 90° so I guess I am still in the zone. Also we are talking Prime95 here not some game that certainly wouldn't let the cpu hit those temps. What I am saying is everybody is naming a different value but I agree the hotter the cpu the shorter its lifetime.

Thanks for your help!

 

[tinytomlogan]

Dude 1.5v is mega high volts for that chip no wonder you are having problems.

That is nothing short of stupid volts, you are probably killing the cpu!

Get the volts down and tbh quickly too.

 

[Kalh]

You are not the first to tell me that. Maybe the first to tell me in a such blunt fashion but nonetheless not the first. By now I have also realized that such a value aint the most smartest thing to key in. I guess somewhere along the line I must have set some other voltages wrong so that my CPU needed that massive amount of Vcore to run stable on prime. Unfortunately I am not at home right now but the first thing I do is bring everything back down to default values and start all over again.