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OCing Sapphire Radeon HD 7950

Last response: in Graphics & Displays
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October 15, 2013 7:43:31 PM

I just order a Sapphire HD 7950 and the core clock is at 850 Mhz (925 Mhz boost). I want to OC it higher but not so high that I would need liquid cooling, what would be a good OC core clock that uses the stock fans/shroud?

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October 15, 2013 7:53:16 PM

Well, that's really for you to find out. Chips vary from every other example, thus its ability to OC also varies. OCing graphics cards is a fairly straightforward business. You can set your own thermal limit and see what clocks you can get. Sapphire provides a good OC utility, TriXX, so you're set.
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October 15, 2013 8:23:00 PM

faster23rd said:
Well, that's really for you to find out. Chips vary from every other example, thus its ability to OC also varies. OCing graphics cards is a fairly straightforward business. You can set your own thermal limit and see what clocks you can get. Sapphire provides a good OC utility, TriXX, so you're set.


I've never OC yet. I don't really know what is too much.
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October 15, 2013 9:02:19 PM

When OCing, do I need to increase the memory clock too? And the voltage?
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October 15, 2013 11:59:44 PM

Trust me it's easy. Check out Sapphire's TriXX software or download MSi Afterburner (I use both), and adjust the sliders. Tweaing the memory frequency is alright, but voltages are a little trick and sometimes unnecessary unless you're attempting extreme overclocks.

Anyway, the general rule in OCing graphics cards is to turn up the frequency sliders by increments, testing it for stability, then if it's unstable you roll back a bit, test it again, rinse and repeat until you've found an overclock that's stable.

The way I do it is this: increase by increments of ten, decrease by increments of 5 whenever there are stability issues. You'd know you're OC is unstable if you see graphical artifacts. You would need a graphics stress test like MSI's Kombustor program or Furmark, run them to test your OC for stability.
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October 16, 2013 12:10:39 PM

I want to OC it to 1000 Mhz, so I cant just turn it up to that in one tweak?
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October 16, 2013 4:49:46 PM

nismo_z said:
I want to OC it to 1000 Mhz, so I cant just turn it up to that in one tweak?


Well.. you can slide the slider to 1000 mHz, just TEST IT, for stability okay? Once you see artifacts, roll the frequency back by increments of 5 until you have a stable overclock.
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October 16, 2013 5:06:22 PM

faster23rd said:
nismo_z said:
I want to OC it to 1000 Mhz, so I cant just turn it up to that in one tweak?


Well.. you can slide the slider to 1000 mHz, just TEST IT, for stability okay? Once you see artifacts, roll the frequency back by increments of 5 until you have a stable overclock.


If it happens to show artifacts, will it ruin the gpu/components in any way?

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October 16, 2013 5:19:21 PM

nismo_z said:
faster23rd said:
nismo_z said:
I want to OC it to 1000 Mhz, so I cant just turn it up to that in one tweak?


Well.. you can slide the slider to 1000 mHz, just TEST IT, for stability okay? Once you see artifacts, roll the frequency back by increments of 5 until you have a stable overclock.


If it happens to show artifacts, will it ruin the gpu/components in any way?



It will ruin you components unless you roll it back. Roll it back by increments, so you can zero-in on the best OC for your card.
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October 16, 2013 5:52:48 PM

faster23rd said:
nismo_z said:
faster23rd said:
nismo_z said:
I want to OC it to 1000 Mhz, so I cant just turn it up to that in one tweak?


Well.. you can slide the slider to 1000 mHz, just TEST IT, for stability okay? Once you see artifacts, roll the frequency back by increments of 5 until you have a stable overclock.


If it happens to show artifacts, will it ruin the gpu/components in any way?



It will ruin you components unless you roll it back. Roll it back by increments, so you can zero-in on the best OC for your card.


Okay, thanks!

Sorry, I'm still a noob with specific computer things like OC.

Couple more questions: (HD 7950)

1. How many more FPS will I get if I OC it +75 Mhz?
2. Is it worth OCing only +75 Mhz?

NOTE: My HD 7950 will arrive soon, thus my questions to prepare for OC (or not).

PC SPEC:
AMD FX-8150
Asus M5A99FX Pro 2.0
Kingston HyperX Black 8GB (1x8)
XFX 700W
1TB HDD
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October 16, 2013 6:04:31 PM

Well, it should get you about around 5 fps, although I'm not entirely sure about that. Yeah, sure it's worth it, since you're basically squeezing performance out of your card that you didn't necessarily pay for.

Well then, enjoy your rig!
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October 16, 2013 6:09:42 PM

Thanks, hopefully I dont kill it! Lol....
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October 16, 2013 6:14:23 PM

Just don't forget to test it whenever you increase or decrease your frequency and you'll be fine.
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!