• Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
    Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.

[H] users 7950 Overclock Results

F

Flyinfinni

[H]ard|Gawd
Joined
Nov 24, 2009
Messages
1,300
Hey all- We had a thread for the 7970 overclocks that our forum brethren were able to achieve, but I've got this new sapphire 7950 OC edition in my rig and was wondering what kind of overclocks you all on the forum have been able to squeeze out of your 7950s. Lets see your crazy results!
My highest stable OC thus far is 1235/1775 at 1.25V. I can run 1200/1775 at 1.2V
http://3dmark.com/3dm11/2934942

What are you all getting?
 
I'm getting my 2 sapphire 7950's OC editions in today and I will post something later. I just hope they overclock well together. Should be beast if they do. Nice overclocks btw.
 
i have the same card, didn't bother messing with voltage any so at stock i was able to get to 1065/1575 stable.
 
andrewbub said:
i have the same card, didn't bother messing with voltage any so at stock i was able to get to 1065/1575 stable.
Click to expand...

Nice. Stock voltage mine would only go to I think about 1045 or so, but I didn't mess much with stock voltage:) Trixx made it WAY too easy. I've actually been extremely impressed with Trixx compared to the first time I tried to use it a bit more than a year ago.
 
I dug up my notes from the overclocking I did when I first received my Sapphire 7950 OC 5 weeks ago.

I tried both Trixx & MSI Afterburner for overclocking & voltage tuning, and after getting similar results from both settled on AB due to its more robust set of features. For stability testing I would let the Leo demo run for 30-60 minutes followed by some Crysis Warhead gameplay in the frost levels (Enthusiast settings, 4xAA).

Testing was done at 18-20c ambient temps & I used the #2 BIOS on the card which supposedly uses a more aggressive fan profile. As reviewers of the card noted, the card's fans are inaudible; unfortunately mine has a bit of coil whine.

925 Mhz core / 1375 Mhz Mem (Stock 7970 settings)
stable at stock voltage of .993v
55c temp

1000 / 1375
1.09v
62c

1075 / 1375
1.149v
66c

1100 / 1375
1.175v
67c

1125 / 1375
1.2v
67c

1150 / 1375
1.2v --> artifacts in Unigine

I have settled on 1075 / 1375 @ 1.149v. Reviewers around the web used voltages of 1.2 - 1.25 in their overclocking, so I wanted to keep my voltage a bit lower than that for 24/7 use. Also I found that while I could increase my memory clock, my scores in Unigine and 3dmark11 would not go any higher with a memory clock above 1375, in fact they went down slightly.
 
awesome write up hodor. This helps me so much. I just recieved my two sapphire OC 7950's last night and was able to get 950/1250 on both cards at stock voltage. I thought that was kind of low but its good to see other peopel with similar clocks. I would love to get anything above 1000 for day to day use. There cards are amazing. So quite. I recommend anyone looking for a 7950 look at these sapphire cards. Would you mind sharing your 3dmark11 graphics score?
 
I have mine at 1200 core 1700 with 1.25volts. I may increase it to 1.275 and play with 1250 core.

I know we can give more volts to the memory but I keep mine at 1.6v for the memory. Dont want to kill it. My temps while gaming say in the 60s.
 
Sapphire 7950oc
24/7 use (have not tried higher YET) using msi ab

1155c
1575m
1.187v

3d11 P9016 with 2700k @ 4.6ghz
 
Huskernation said:
Sapphire 7950oc
24/7 use (have not tried higher YET) using msi ab

1155c
1575m
1.187v

3d11 P9016 with 2700k @ 4.6ghz
Click to expand...

Update

This thread got me tinkering with things and I think I have a new 24/7 oc

1200c
1575m
1.2v

3d11 P9224

I ran 3d11, heaven and did some bf3 gaming and no artifacts or problems in anything.
 
Huskernation said:
Update

This thread got me tinkering with things and I think I have a new 24/7 oc

1200c
1575m
1.2v

3d11 P9224

I ran 3d11, heaven and did some bf3 gaming and no artifacts or problems in anything.
Click to expand...

What driver version are you using? Also- could you link to your actual 3dMark11 score? I'd like to compare it to mine to see just how much of a difference that 2700k makes over my i5 750:)
 
how are you guys getting over 1100 core 1575 memory? MSI AB does not let me go higher.
 
oMek said:
how are you guys getting over 1100 core 1575 memory? MSI AB does not let me go higher.
Click to expand...

My card is a dual bios switch that someone on here informed me about. I was like you and stuck at a limit then I changed it and I am now at the max (in ab) with the second bios. If you look around there is a fix but I could not get it to work.
 
oMek said:
how are you guys getting over 1100 core 1575 memory? MSI AB does not let me go higher.
Click to expand...

Wait, you have the same card, right next to the xfire bridge there is a tiny switch, if you look at your card in the case it should be just to the right of the xfire connections.
 
Will be receiving this card within the next week. I'll be sure to leave some input.
 
I think you will really like it. I was debating between this one and the gigabyte version and I am happy I went with the sapphire. It is really quiet and seems to oc great. The core on my card is now 50% above stock which is really impressive.
 
Huskernation said:
Wait, you have the same card, right next to the xfire bridge there is a tiny switch, if you look at your card in the case it should be just to the right of the xfire connections.
Click to expand...

What about that switch? Will it improve our overclock? I thought that switch was for just a second bios with increased voltage, nothing more... Am I missing a super secret?
 
Huskernation said:
Wait, you have the same card, right next to the xfire bridge there is a tiny switch, if you look at your card in the case it should be just to the right of the xfire connections.
Click to expand...

i'm hoping that switch can be used to flash to 7970, but my hopes aren't that high :p
 
2wiced said:
What about that switch? Will it improve our overclock? I thought that switch was for just a second bios with increased voltage, nothing more... Am I missing a super secret?
Click to expand...

the switch upped my max OC range (msi afterburner) from 1100/1575 to 1200/1600.
 
Same here. For me my card came on the number two bios postion. Pretty awesome sapphire. This OC card is amazing. Im getting the same 3dmark11 scores as stock 7970's in crossfire at lower temps as well. absolute beast.
 
oMek said:
the switch upped my max OC range (msi afterburner) from 1100/1575 to 1200/1600.
Click to expand...

Yup. I found though, using Trixx, once I hit the max of whatever the slider range was for either core or memory, it would automatically extend the slider range! I didn't have to do any additional tweaking to go above 1200/1600. Trixx automatically allowed me to keep pushing that slider :) I have been a fan of MSI AB for a long time and never really thought about using Trixx, but figured I'd give it a try this time since I had a sapphire card. It has all the features I NEED. AB may have a few things it does not, but it doesn't really matter. In addition, Trixx has a windows 7 sidebar gadget, so I can stick that on an have it running on a side monitor as well :)

Also- I've been surprised by how much your CPU actually affects your 3dMark11 score! My best graphics score is 9749, but my overall score is only 8674 due to low CPU score... My poor old i5-750 is showing its age:-( Still love this little chip though!
 
Is it true that xfire makes it harder to get a better overclock on cards? Im happy with my limits for my cards but they just arent near as good as what some people with single cards. Thanks
 
hammerforged said:
Is it true that xfire makes it harder to get a better overclock on cards? Im happy with my limits for my cards but they just arent near as good as what some people with single cards. Thanks
Click to expand...

yea heat becomes an issue and maybe PSU also.
still with proper cooling you should reach pretty much max OC even in crossfire.
 
Thanks for the respone. I was able to get to 1150 on both cards with around 1.23 mV and anything else and 3dmark11 would just keep frezzing. Didnt push the voltage passed 1.25 though. Temps were never above 72C the whole time and I have a 850 watt platnium psu so idk. One gpu's asic score is really low (60%) but I dont really dont know if the asic quality is a legit measurement or not.
 
These cards are really nice. I don't miss my 460 SLI at all! Now to find a better case with improved air flow.

Thx for the tip about the switch. 1200 /1600 without messing with .dll's is good enough for right now at least.
 
hammerforged said:
Thanks for the respone. I was able to get to 1150 on both cards with around 1.23 mV and anything else and 3dmark11 would just keep frezzing. Didnt push the voltage passed 1.25 though. Temps were never above 72C the whole time and I have a 850 watt platnium psu so idk. One gpu's asic score is really low (60%) but I dont really dont know if the asic quality is a legit measurement or not.
Click to expand...

Have you tested these cards one at a time in the computer? I'd like to know how high the 60% card overclocks.
 
You must log in or register to reply here.
Back
Top