Overclocking Gigabyte 7850 2GB

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Meas

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Dec 13, 2012
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I'm getting my card in a couple of days and I was wondering if anybody knew whether these have voltage control since I'm very interested in pushing it to its limit. If it doesn't have voltage control, any experience with flashing it to some other manufacturer to get said voltage control. If the latter is also not possible for whatever reasons, what clocks should I expect on stock voltages.
Thanks in advance
 
Solution
IInuyasha74
Seems you are correct :)
I think you will be fine on the Gigabyte version. Since with most overclocking utilities the card is locked at 1050, you will hit that limit before you ever hit the voltage limit. So I doubt you will have any issues raising your voltage. You may want to trade off the thermal paste though, that gave my card a decent drop in temps. Other than that just be real careful with the RAM if the cooler doesn't touch them and you should be good. Make sure to come back and post your results :)
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IInuyasha74

IInuyasha74

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May 1, 2013
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Hello,

I have a 7850 2GB from Powercolor. On stock voltage using AMD overdrive I got to 1000 core clock, and 1400 on vRAM. I don't know if you have voltage control, but really I would say it doesn't matter. That is quite a boost already, only 50mhz short of the max AMD overdrive can do.

I didn't want to increase voltage on mine. Honestly today I was just thinking it would be fun to see if I can undervolt it and stay stable.
 
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M

Meas

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I've seen people getting 1300 core clock so I'm rather intrigued how far my chip could do. 1150-1200 core clock seems like a sweet spot in my opinion. Thanks for the input though :).
 
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IInuyasha74

IInuyasha74

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Oh then yea the type of card you have will be important. I have only heard of getting that high on an Asus version of the card,
http://forums.anandtech.com/showthread.php?p=34429775

and that is using a very specific version of the software. Outside of that, even on hwbot the highest anyone has recorded is 1129,
http://hwbot.org/hardware/videocard/radeon_hd_7850/

So make sure your card has a good cooler. If it is like my cooler, the RAM is not cooled by the heat sync and so my RAM is limited on overclocking without overheating. If you do have them cooled, then using another program than AMD Overdrive you may be able to get it a bit higher, but chances are without having the ASUS card and the exact version they used you won't get close to 1200.
 
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M

Meas

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http://forums.overclockers.co.uk/showthread.php?t=18389760
http://www.overclockers.com/forums/showthread.php?t=716796
Not limited to Asus, but those guys were probably really lucky to get those clocks.

As far as I've read, nobody mentioned some spectacular clocks on the Gigabyte version, but it runs really cool. The 'overclockiness' should be chip to chip anyway rather than the manufacturer, only the voltage/heat should be the issue.
 
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IInuyasha74

IInuyasha74

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May 1, 2013
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27,965
Seems you are correct :)
I think you will be fine on the Gigabyte version. Since with most overclocking utilities the card is locked at 1050, you will hit that limit before you ever hit the voltage limit. So I doubt you will have any issues raising your voltage. You may want to trade off the thermal paste though, that gave my card a decent drop in temps. Other than that just be real careful with the RAM if the cooler doesn't touch them and you should be good. Make sure to come back and post your results :)
 
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Solution
IInuyasha74

IInuyasha74

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May 1, 2013
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Speaking of all this I decided to play around with mine a little more. I have suspected before that mine is a poor overclocker, but I just got it up to 1050/1450 for the core/ram clocks. I had to give it a measly 1% boost in voltage though, which is worse than some.

Only adding this because with only a 1% boost in power I am getting 22% more performance out of the core than at stock. So you shouldn't have to give it a ton of added voltage to get to 1150~
 
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