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Sapphire HD7970 OC With Boost safe overclocking tips? - Page 2

post #11 of 22
Thread Starter 
I will test the fan profile settings today after I've finished my work. Yesterday I also noticed that the Card is tilted from the far back and that might couse some problems in the heat department as the cooling system might not get a proper contact to the chipset.
post #12 of 22
You'll be lucky to get stable at or above 1200 on the core with that card (I have the same Blue PCB). I assume the stock voltage is 1.256v. The memory as Huzzug said doesn't really benefit as it has enough bandwidth already also the memory on that specific card is at 1.5v whereas most other 7970's are at 1.6v, the memory won't go above 1600MHz regardless of voltage.

I'm currently running 1150MHz on the core at stock voltage which is incredibly high (1.256v) and 1500Mhz on the memory.

If you want to give memory voltage tweaking a try then visit the "AMD How To Thread" http://www.overclock.net/t/1265543/the-amd-how-to-thread/0_20
Download the "4.4.0b Modded Trixx" that will allow you to modify the memory voltage in addition to the core voltage. Trixx 4.6.0 has been released but it has no useful features over the 4.4.0 and it has not been modded yet and therefore cannot modify the memory voltage.
Quote:
Originally Posted by horna212 View Post

I will test the fan profile settings today after I've finished my work. Yesterday I also noticed that the Card is tilted from the far back and that might couse some problems in the heat department as the cooling system might not get a proper contact to the chipset.

The VRM's do get a little toasty on this card especially in Battlefield 3, They are rated for 105c but its not recommended to run them over 85c for an extended period of time. The core stays cool though, never goes above 65c in any game, benchmark etc. However I'm using a Custom profile.
Edited by Razor 116 - 2/20/13 at 6:59am
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post #13 of 22
Thread Starter 
Im currently staying at the clocks in the picutre. The max temperature is from heaven benchmark @1920x1080 no AA, Avg FPS was 98 when I made that run with the clocks.


e: For some reason the HWMonitor shows the voltage the max voltage as 1.175V but I set them at 1.250V with Trixx.
Edited by horna212 - 2/20/13 at 8:26am
post #14 of 22
In GPU-Z click the "Sensors" tab, that will show you your temps and voltages. How are you testing stability, A Unigine run (30+ minutes) is good for a baseline stability test but what is stable in that may not be in games. Battlefield 3 is a good test for a stable overclock. What is stable in Battlefield 3 is normally stable in everything else at least for me. As with everything relating to overclocking your mileage may vary.

1.250v for 1100MHz core seems a little too high to me, I get that at 1.175v.

You should leave the voltages alone until you reach instability not cranking it up to begin with, what I do is 25MHz bumps then a Unigine run, repeat until instability then start upping the voltage in 5mv increments to reach stability. Continue this until you have your maximum OC. Be sure to monitor temps especially VRMs. The sapphire cooler is great for the core but the VRM's tend to get a little hot, try to keep them under 85c

Could you upload your BIOS please. To do this click the button beside "Bios Version" in GPU-z this will save the BIOS to your computer.
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post #15 of 22
Thread Starter 
Quote:
Originally Posted by Razor 116 View Post

In GPU-Z click the "Sensors" tab, that will show you your temps and voltages. How are you testing stability, A Unigine run (30+ minutes) is good for a baseline stability test but what is stable in that may not be in games. Battlefield 3 is a good test for a stable overclock. What is stable in Battlefield 3 is normally stable in everything else at least for me. As with everything relating to overclocking your mileage may vary.

1.250v for 1100MHz core seems a little too high to me, I get that at 1.175v.

You should leave the voltages alone until you reach instability not cranking it up to begin with, what I do is 25MHz bumps then a Unigine run, repeat until instability then start upping the voltage in 5mv increments to reach stability. Continue this until you have your maximum OC. Be sure to monitor temps especially VRMs. The sapphire cooler is great for the core but the VRM's tend to get a little hot, try to keep them under 85c

Could you upload your BIOS please. To do this click the button beside "Bios Version" in GPU-z this will save the BIOS to your computer.

The default Voltage is at 1.2V.
If I try to increase the voltage with Trixx and run a benchmark at 1100MHz and then start Trixx again after the benchmark it says the voltage is set at 1.2V, I didn't notice this at the first benchmark I did with the clocks.

Even if I try to up the clocks by 25MHz from the 1100MHz and leave the voltage still, It gives me artifacts on Heaven Benchmark set at 1920x1080 0xAA.
After trying to up the clocks by 25MHz from the 1100MHz AND upping the voltage to the said 1.25V it still gives me artifacts on the same benchmark.

Here is the BIOS.
Edited by horna212 - 2/20/13 at 12:56pm
post #16 of 22
Quote:
Originally Posted by horna212 View Post

The default Voltage is at 1.2V.
If I try to increase the voltage with Trixx and run a benchmark at 1100MHz and then start Trixx again after the benchmark it says the voltage is set at 1.2V, I didn't notice this at the first benchmark I did with the clocks.

Even if I try to up the clocks by 25MHz from the 1100MHz and leave the voltage still, It gives me artifacts on Heaven Benchmark set at 1920x1080 0xAA.
After trying to up the clocks by 25MHz from the 1100MHz AND upping the voltage to the said 1.25V it still gives me artifacts on the same benchmark.

Here is the BIOS.

A quirk with Trixx is that you have to hit apply twice e.g. if you set 1.185v and hit apply it will change the voltage option to 1.187 and you have to click apply again. If this is not the case then it would seem that unfortunately your voltage is locked. Open GPU-Z check the "Continue refreshing this screen while GPU-Z is in the background", run a Heaven again, exit and check you VDDC if its close to your set voltage (Vdroop will make it lower than what you set this is normal) then your voltage OC is being applied. If it is not you are voltage locked.

Don't close Trixx.

The dropbox link didn't work, say's its been deleted.
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R116
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post #17 of 22
Thread Starter 
Quote:
Originally Posted by Razor 116 View Post

A quirk with Trixx is that you have to hit apply twice e.g. if you set 1.185v and hit apply it will change the voltage option to 1.187 and you have to click apply again. If this is not the case then it would seem that unfortunately your voltage is locked. Open GPU-Z check the "Continue refreshing this screen while GPU-Z is in the background", run a Heaven again, exit and check you VDDC if its close to your set voltage (Vdroop will make it lower than what you set this is normal) then your voltage OC is being applied. If it is not you are voltage locked.

Don't close Trixx.

The dropbox link didn't work, say's its been deleted.

Oh derp, im fixing the link

e: the link should work now.
post #18 of 22
Cheers thumb.gif Did you have any luck with the voltage adjustments?
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post #19 of 22
Thread Starter 
I Will give the adjustments a go tomorrow after work and Post the results. Gotta get some sleep now.

Sent from my HTC Desire S using Tapatalk 2
post #20 of 22
Thread Starter 
Quote:
Originally Posted by Razor 116 View Post

Cheers thumb.gif Did you have any luck with the voltage adjustments?

Well, after some testing it turned out that my card is NOT voltage locked at all smile.gif

I got the core to 1150MHz and the VRM Max temps on benchmark were 70°C and the chipset was 67°C at it's hottest.

I'm pretty satisfied with this clock and will propably stay here currently and see how stable the card actually is in gaming.

Insanely big thanks for helping with this +REP to you.
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