4670k overclocking with stock heatsink

mrsandbox123

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i recently built my pc, i didnt end up buying a heatsink so im just using the stock one. i was wondering what would be a stable overclock? My motherboard is a asus z87-k, PSU is APEVIA ATX-AQ 700W
 

fatboytyler

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Jan 29, 2012
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Whats the GPU?

And its never a good idea to over clock on the stock heat sink, never. The stock heat sink is barely enough to handle stock clocks and voltages. I would strongly advise a Cooler Master Evo 212. Its a great cooler and its pretty cheap. Without it you might be able to overclock 100-300 MHz absolute tops. THat would be with great airflow and a low ambient temperature.
 

mrsandbox123

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its the MSi GTX 760 (MSI Gaming N760 TF 2GD5/OC)
 

ihog

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Just go ahead and overclock. The chances of you being able to hit a decent overclock is slim, but you never know until you try. Hey, you never know, you might've gotten a really good chip. Just make sure to stress test the overclock (IntelBurnTest or Prime95) and monitor your temps.
 

fatboytyler

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Firstly stress test it without an over clock. I am willing to bet that the stock heat sink will allow the CPU to easily and quickly hit 85+.

And I would not stress that power supply very much at all, but with a 760 you won't be putting a lot of strain on it.
 

Cardflip

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Don't overclock with the stock cooler. Not only will your temps reach very unsafe numbers, the CPU will start to throttle (or even shut down) the speeds rendering your overclock useless and extremely damaging. Even on idle my 4670k is 50 C. On prime95 it reached to over 100 with the turbo boost enabled. I manually set my volts down to about 1.149 and my temps seem ok for now. Seriously, just don't do it. The only reason to overclock that CPU anyways is for bragging rights, there is little to no performance gain until it starts to fall behind future technology.
 

ihog

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You don't know until you try. He's not going to damage anything by trying, as long as he shuts down the stress test when temps get too high. Even then, he probably won't.
 

In3rt1a

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I'm running an i7 4770k, and I ran into the same issue as you. I ran a stress test on the cpu (100% load at 3.7 ghz) and quickly hit 85c+. You definitely need an aftermarket heatsink.
 

tshrimp

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Oct 18, 2013
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I hear what you guys are saying here about the stock cooler, but my idle temps are 26C and that is with 2 7850 in crossfire. I am not sure what it gets like during gaming though. I know my GPUs get up to about 46C when gaming, but never checked my CPU as of yet. New build. Since my system seems to run cool with stock cooler do you think it would be possible to get some overclocking in? i5 5670K on an Asus Z87-A, 8GB 1600MHz ram, 2 HD7850 with slight overclock, Corsair 750 PSU. Case has 5 140mm fans and one 120mm fan. One fan blows directly onto the crossfire setup.

Reason I ask is I have purchased recommend aftermarket Fan/HS in the past and never had it do all the much better on temps. Maybe 2C and felt like I wasted the money. Any good test to look at that show what people are getting with stock vs aftermarket. P.S...Was using Arctic Silver 5 last time I overclocked. If I do get a good one what should I expect to get up to considering my not so high end Motherboard? Thanks.
 

Napoleon85

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1 - stock temperatures mean nothing.
2 - If you bought aftermarket coolers and got no gain, then one or more of the following statements are true; the cooler you bought was junk, the TIM you used was junk, the cooler was not installed properly.

There is an excellent collection of reviews on both air and water based cooling solutions on this site. I recommend that you review them and find the best option that fits in your budget. The only thing I would recommend you stay away from is the "direct heat pipe" type coolers. The way the die is situated on the IB/Haswell chips does not lend itself to this kind of cooling, depending on how it's mounted.
 

tshrimp

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Oct 18, 2013
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Been running Prime95 for a while now, and my temps have leveled out at about 51C. Does this leave me any room to OC with stock cooling?
 

Napoleon85

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51C is pretty cool, so yes there is some room. I would run some other tests with OCCT (Linpack with AVX enabled) and/or IBT though. I bet your temps will be a lot higher on those tests.
 

TheRealShoe

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Oct 29, 2013
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Also run AIDA64, I heard Prime 95 isn't very good on Haswell processors. I have a h100i, and I got a max of ~55 with an average of ~45 at stock clocks, so yes, those temps are very good for stock cooler.

Also I would recommend a EVO over any other water cooling, because it gives you a cheaper option to upgrade to a custom loop in the long run.
 

In3rt1a

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Do you run a haswell chip? I get 60-65 c under load and 30 c while idling.
 

TheRealShoe

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Yes 4670k. At 4.4Ghz which I run now I get those temps under load, ~35 at idle. My idle always seems high, but my max is usually pretty low. Keep in mind I am using a h100i, not sure what you are running.
 

In3rt1a

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I'm running an h100i as well, stock fans, 4770k, 3.5 ghz. I'm gonna upgrade those fans though, they start howling as soon as I boot up any of my games.