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Gigabyte HD7950 Windforce 3 Overclock

post #1 of 80
Thread Starter 
Hey guys,

I got my HD 7950 after some doubting, but it's here!
I just upped the Clocks to max (1100 MHz and 1575MHz I believe), and the voltage is at 1175 mV right now.
Would you consider that a decent overclock or kind of crappy (I made 25mV jumps and haven't "finetuned" it yet, I've never overclocked my GPU before either so I don't know if that was a smart move to do ghehe.

I've ran the heaven benchmark, I had some some vertical orange lines with a black background at the end of the benchmark when I used 1150 mV.


Let me know what you think.

Thanks

EDIT:::::::::::::::

Oh yeah, according to HWiNFO64 my the VRM temp was 65 degrees celcius MAX is that too high?


EDIT2:::::::::::::::::::::

I'm using the 12.11 beta drivers.
Edited by Sleazybigfoot - 11/17/12 at 4:48am
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post #2 of 80
what the stock voltage on your card at the stock settings of 900 Mhz. also whats your core temps. 1.1 Ghz is a decent overclock. Generally 1.15 Ghz is considered good. If you can get to 1200 mhz with 1.2v then its very good. Also if you can run 1250+ Mhz completely stable in games you have a golden HD 7950 . thumb.gif
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post #3 of 80
Thread Starter 
Stock voltage is 1090 mV

I'll be tweaking it some more I guess, but I'm really happy though.

My GTX470 1.2Gb in Battlefield 3 everything ultra I got 40-60 fps, (avg was about 50 I would say), my avg now is like 75/80 so I'm really really happy hehe.

But I can't go higher than 1100 MHz, or do I need to install some sort of update or something?

I don't think I can get 1200 with 1.2V anyway, I'm already touching it, 10 more mV and I'm at 1.2V, (I increased it a bit more cause I got a crash in battlefield 3. It locked up with vertical stripes on screen)

What would be the max Voltage for the HD7950's? 1.3? or does it run too hot then.


EDIT::::::::::::::::

Oh I might also just suck at overclocking, resulting in me needing a higher voltage.
I've never overclocked before so.
Edited by Sleazybigfoot - 11/17/12 at 5:42am
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post #4 of 80
Yes the max locked voltage for the Gigabyte 7950 windforce would be 1.3v.

I have my card running now at 1200/1600 @ 1.268v when benching and it's stable in Kombustor (15 min pass), Heaven and 3DMark11. The max temps I hit (with a very aggressive fan profile) @ 25*C ambient is 64-65*C.

When I'm playing games and I don't want the heat I usually stick with 1150/1575 @ 1.168v. Using that setting with the same ambient the max temps I get are 53*C. So big difference in heat generated.
Edited by mark_thaddeus - 11/17/12 at 5:59am
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post #5 of 80
Quote:
Originally Posted by Sleazybigfoot View Post

Stock voltage is 1090 mV
But I can't go higher than 1100 MHz, or do I need to install some sort of update or something?
I don't think I can get 1200 with 1.2V anyway, I'm already touching it, 10 more mV and I'm at 1.2V, (I increased it a bit more cause I got a crash in battlefield 3. It locked up with vertical stripes on screen)
What would be the max Voltage for the HD7950's? 1.3? or does it run too hot then.

There are 2 options.

1.) you could manually tweak voltage for the best clocks at optimum voltages. You could go for go for 1.25v as long as core temps are below 70c and VRM temps below 90c under load in games like BF3 and benchmarks like Heaven 3.0.

2.) the other option is update your BIOS to the boost BIOS. do you have dual BIOS on your card. if it is use the BIOS which has write facility. Gigabyte has released a boost BIOS with 1 Ghz boost clocks for the HD 7950 OC (900 Mhz) with model number GV-R795WF3-3GD.

http://www.gigabyte.com/products/product-page.aspx?pid=4121#bios

Normally the boost BIOS increases voltage to 1.25v. so once you have flashed this BIOS you should be able to hit 1.15 - 1.2 Ghz at stock voltage.

But on a 1080p 60 Hz monitor once you cross 60 fps it does not really matter. You can hit 60 fps in BF3 multiplayer at 1080p at Ultra 4x MSAA even at stock 900 Mhz

http://www.hardocp.com/article/2012/11/12/fall_2012_gpu_driver_comparison_roundup/4

My advice is to go for voltage overclock only when the extra performance is required in a game. Otherwise at stock voltage just aim for 1 Ghz and call it a day. thumb.gif
Edited by raghu78 - 11/17/12 at 5:52am
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post #6 of 80
Quote:
Originally Posted by Sleazybigfoot View Post

Hey guys,
I got my HD 7950 after some doubting, but it's here!
I just upped the Clocks to max (1100 MHz and 1575MHz I believe), and the voltage is at 1175 mV right now.
Would you consider that a decent overclock or kind of crappy (I made 25mV jumps and haven't "finetuned" it yet, I've never overclocked my GPU before either so I don't know if that was a smart move to do ghehe.
I've ran the heaven benchmark, I had some some vertical orange lines with a black background at the end of the benchmark when I used 1150 mV.

Let me know what you think.
Thanks
EDIT:::::::::::::::
Oh yeah, according to HWiNFO64 my the VRM temp was 65 degrees celcius MAX is that too high?
EDIT2:::::::::::::::::::::
I'm using the 12.11 beta drivers.


Hi,
Put the tesselation at EXTREME then redo the benchmark biggrin.gif

1100 @ 1175 seems average. That's about the clock that I could hit with my 7970s that were voltage locked.
Edited by splinterize - 11/17/12 at 5:52am
post #7 of 80
Thread Starter 
Hmm, k.
I think i'll just leave it like this.

Got 1 problem though, right now after racing around on an ATV in battlefield 3 (All around the map) on Armored Shield, it locks up, with vertical lines, in 3 colors, like first light blue, normal blue, darkblue/black, and that pattern repeats it self.

Do any of you know what the problem might be? Low voltage?

Thanks.


EDIT:::::::::::::::



EDIT::::::::::::::::::

This is what happens:
http://www.youtube.com/watch?v=fkzOWRgwfaA&feature=relmfu
(Skip to 1:32)
Edited by Sleazybigfoot - 11/17/12 at 6:12am
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post #8 of 80
Quote:
Originally Posted by Sleazybigfoot View Post

Hmm, k.
I think i'll just leave it like this.
Got 1 problem though, right now after racing around on an ATV in battlefield 3 (All around the map) on Armored Shield, it locks up, with vertical lines, in 3 colors, like first light blue, normal blue, darkblue/black, and that pattern repeats it self.
Do any of you know what the problem might be? Low voltage?

make sure to test BF3 at stock settings thoroughly. if those problems are resolved then you don't have to worry. also have you installed the latest 12.10 CAP 1 (Catalyst application Profiles)

www2.ati.com/drivers/hotfix/catalyst_application_profiles/AMD_Catalyst_12.10_CAP1.exe
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post #9 of 80
Quote:
Originally Posted by raghu78 View Post

... also have you installed the latest 12.10 CAP 1 (Catalyst application Profiles)
www2.ati.com/drivers/hotfix/catalyst_application_profiles/AMD_Catalyst_12.10_CAP1.exe

Only install the CAP 1 driver if your doing X-fire otherwise you really don't need to install that.

Here's the description for the drivers:

'This release of AMD Catalyst™ delivers support for the latest AMD CrossFireX™ and AMD Enduro™ profiles in a separate executable file ensuring users have access to the absolute latest set of profiles installed on their PC.'
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post #10 of 80
Thread Starter 
I don't run Crossfire.

Also Raghu, with stock settings you mean the default clocks right?
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