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A10 7850k overclocking

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  • Overclocking
Last response: in Overclocking
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September 16, 2014 4:09:49 PM

Hi guys, i have a question about above mentioned apu. I have looked at dozens of overclocking guides for my cpu and when i tried it for myself i spotted some disturbing differences. In most other guides they oc-ed it to 4,2 GHz without any changes to the vcore voltage, and for the 4,3 to 4,4 oc they used somewhere between 1,308 and 1,35V. I only managed to get it stable at 4,2GHz @ 1,44V. If i get any lower i get a freeze testing with occt or prime95. And of course i can't go any higher because after an hour of occt testing temperatures get up to 67C. Now, is there anything that i missed, or do i have just the luck of getting a bad chip?

Specs:
Corsair carbide spec-01 case
Gigabyte g1 sniper a88x
amd a10 7850k black edition
zalman cnps 7500 cu led cooler
gigabyte r9 270x windforce oc
crucial balistix sport 2x4gb ddr3 1600mhz
aerocool strike-x 800w 80+ silver psu
2x 120mm front intake corsair fans
3x 120mm rear and top arctic f12 pro exhaust fans

bios settings:
cpu base clock: 100mhz
multiplier: 42
c6,c&q, turbo core: disabled
llc: medium

More about : a10 7850k overclocking

September 16, 2014 4:53:33 PM

Oh hey, we have the same chip man I only OC`ed my CPU to 4.3 which is the most stable clock so far.

I am not familiar with your CPU cooler but I think if you wanted to have higher clocks you should get a higher end Cooler. A Noctua NH D14 I suggests.

When I clock to 4.4 I usually let my system crashes when going beyond 70C with voltage around 1.4

So overall, if you want an aggressive clocks get a better cooler.
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September 16, 2014 4:59:47 PM

first of all, i am in love with those little chips, they are a tinkerer's paradise, since you have access to gpu clocks cpus clocks and voltages aswell as lots of ram tweaking that will actually make a difference. I did alot of research and worked on a friends chip a while ago (which was an A8 somethin i dont remeber now) and heres what i have to say...

get a better coooler.....

i would have more to say if you were interested in overclockign the whole chip and using for all graphics and cpu calculations, but you're running into temperature instability, keeping things colder will also allow to push higher clocks without increasing voltages, because as you may know from a basic physics class, resistance in a wire is proportional to temperature, therefore the hotter the chip gets the more volts required, which increases temperature and then requires more voltage

so

with a bad cooler, once you reach a certain temperature your temperatures begin to go up faster and faster

however with a better cooling solution, your looking at fairly linear temp increases proportional to clock rate

and faster than linear increases when changing voltages.

changing both will quickly result in reaching a coolers max potential. and judging by the cooler your running, your gonna need a replacement. i just bought a corsair h60 and let me tell you it sux. it replaced my zalman CNPS9500 and has much worse temps at even lower clock rates. But the zalman was noisey ( only under heavy load) so i stuck with the h60 for gaming and stuff, but when i get out new chips i whip out the zalman. i dont think there is a cooler out there that is as small as the CNPS9500 that can cool as good, so if you have a small case maybe thats for you, and for 10 dollars more you can buy the CNPS9700 which is a good bit larger, but i recently used it in a friends build... and it was a beast. but at its size and price range there are better options and only because the single fan gets noisey under heavy load.
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September 16, 2014 5:06:12 PM

That`s pretty technical explanation up there. Good way of explaining and good insights for resources.
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September 17, 2014 7:12:29 AM

iamlegend said:
That`s pretty technical explanation up there. Good way of explaining and good insights for resources.


I am a chemist at heart, so my favorite part of building my comps is OC and cooling solutions. I think i spend more hours in the case than i do on the screen.
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September 17, 2014 11:44:02 AM

thanks man, i really didn't know that voltage requirements increase with temperatures. your post just saved me from loosing my mind over this. i will look into other coolers. the problem is, i don't want a big air cooler cause i don't like the looks of it....and as far as liquid cooling goes, i cant fit something like h100i in the top of the case because the mobo and rams get in the way....so i'll probably buy something like h80i or if i find some air cooler that is good and not too big...
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September 17, 2014 4:13:20 PM

Yes man, that`s a good choice. Choose what your heart desires. haha
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