Help overclocking i5-760 : What Cooler Do I Need ?

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tandlion13

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Mar 25, 2014
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Hi everyone, I recently try overclocking my i5-760 to 4.0Ghz on Asus P7P55 LX with Thermaltake Contac 21 cooler. I can boot to windows successfully but when I run Prime95, the temp goes high over 90*C after 10 minutes and my computer shutdown automatically. I guess it was my cooler that cannot handle the temps. So I'm upgrading my cooler to something like a CM Hyper 212X. Do you think it would handle the temps? or I have to go with a higher-end cooler to run my CPU@4.0Ghz. Please give me some suggestion about what cooler do I need for the situation. Very much thanks in advance.

P.S.
I apply these setting to the bios
http://www.youtube.com/watch?v=GUk0gUgq6Oo
This guy and I have exactly the same motherboard, the difference is his CPU was i5-750
 
Solution
JackNaylorPE
1. I wouldn't use Prime95. Your computer will never see such loads outside of a synthetic benchmark. Download RoG Real Bench.... it uses "real applications",and presents a more accurate real world load for your computer.

2. The Hyper 212 is a great budget cooler..... it does fall 7 - 10C behind the big boys. If the extra $40 is not an issues, I'd suggest the Phanteks PH-TC14-PE
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nukemaster

nukemaster

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90c is good and hot.

I would try to slowly lower the voltage as it can decrease the temperature(some of those 7xx cpus could work at rather low voltages). You will have to test to ensure that you do not go too low for stable operation.

Next thing to do is not expect too much out of a cpu. Not all chips will make it to 4.0. Your boards voltage regulation system is not that powerful and not designed for heavy overclocking either.

A larger cooler will help, but you have to make sure you do NOT overdo it or you will damage the system.
 
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JackNaylorPE

JackNaylorPE

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1. I wouldn't use Prime95. Your computer will never see such loads outside of a synthetic benchmark. Download RoG Real Bench.... it uses "real applications",and presents a more accurate real world load for your computer.

2. The Hyper 212 is a great budget cooler..... it does fall 7 - 10C behind the big boys. If the extra $40 is not an issues, I'd suggest the Phanteks PH-TC14-PE
 
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tandlion13

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@JackNaylorPE : Thanks for suggesting a good benchmark software. I have not try it yet but I will after I got a new cooler, maybe in a week or twos. About Phanteks cooler you suggested, great cooler it is but I think I cannot find it in my country, I live in Thailand by the way. Most coolers here are Cooler Master/ Thermaltake / Zalman / Xigmatek / some Antec and Thermalright and few other minor brands. Another reason is I'm using a small case that cannot support such a big cooler, even a 212X I'm asking will hardly fit but I think I will give it a try. Thanks again :)
 
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tandlion13

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@nukemaster : I think I understand what you're talking about, thanks for a good advice. I am running my CPU at stock for now and will try that after I got a new cooler. I have 3 more questions.

1) What voltage and temp do you suggest it would be a sweet spot for my CPU?
2) If my CPU will never run at 4.0, what speed do you suggest I could try according to the average OC of i5-760 CPUs?
3) Can you suggest me some good motherboards for OC'ing my CPU? Maybe I could find a 2nd hand one for a good price in the future.

Thanks in advance :)
 
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nukemaster

nukemaster

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The problem is some of these early chips clocked like monsters while others did not.

My i7 920(same generation, but LGA 1366) required WAY too much voltage to get past 3.8. I settled on 3.5-6 for that system in the end. I would just gently adjust clock speeds until you start to need more voltage than it is worth.

To this end, you will have to tweak it to find out how much voltage you need.

I know with a stock i5 750 i was able to undervolt fairly well. I have about 1.06(0.8-0.86 idle) with 4 cores loaded, but my board can not adjust the turbo voltage so it will go past that to boost the cores with less cores loaded.

Maybe I have a decent chip, but will not be overclocking it in my small case with the rather limited power system on my board.
 
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