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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 3706

post #37051 of 38704
I believe I was hitting 1300 around 1.35 volts. I'd have to check. I really only ran that for benchmarking and this was under water. It wasn't that stable and I noticed some artifacts during benching. I believe my cards have suffered from pushing them that hard and I now let them sit at 1100/1600 for gaming.
post #37052 of 38704
Only reason why I try to push it so hard is for Crysis 3....
I run all max settings on 1080P with 2x MSAA, and can keep it between 40 and 70 FPS with the core this high. (1250/1600)
Reducing the core, and increasing the memory clocks (1200/1800) sees a 3 FPS hit on the min frames, a 4 FPS hit on average, and an 8 FPS hit on max frames.

At 4x MSAA the performance leans back towards favoring the memory overclock, BUT, the overall frames shift down to around 32 min, and 60 max with an average of around 45. It's definitely playable, but honestly, sitting 5-6 feet away from my TV, I can't see a notable difference, and the 2xMSAA @ (1250/1600) feels smoother than the 4xMSAA at (1250/1600) and (1200/1800).

I'd REALLY like to be able to get 1250/1800 but I think my VRAM's over heat with the power draw needed for the core and VRAM. I am having to give up one to get the other. This damn card just get TOO hot. mad.gif
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post #37053 of 38704
I need to take off my fan and put on some new thermal paste on my 7950, it still has factory stock material in there and I have some MX-2 I'd like to put on there.

And I need some VRAM sinks as well, since my VRAM seems to be the thing that kills my card most on benches.
Edited by Zen00 - 10/20/14 at 8:11am
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post #37054 of 38704
These cards are so cheap now you should just pick up another one and throw it in. Should solve your issues with crysis 3. I have crysis 2 and play it with eyefinity 5760x1080 just fine with two cards. Not sure how much more demanding crysis 3 is.. I don't think I would ever run these cards that hard with stock cooling. . Mine were reference cards though
post #37055 of 38704
Yeah, I have the top model, so the cooler is a big step up from reference, but to be honest, I am thinking of keeping the heatsink on it, and pulling the shroud and fans off, and attaching two high speed 120MM with some zip ties!! Also want to get a fan or some heatsinks on the VRAM (uncovered) and try to cool the VRM some more.... I already did an MX-4 job on the core, and it helped lower temps around 5c....

If I can get sub 85C at 1.4v, I am going to get off of afterburner and use GPUtweak to go for 1350-1400MHz core!!!!
Like you said, they are cheap now.... I found an identical match to my 280x on craigslist for $140 I plan on upgrading my PSU and grabbing a second card.

If I can successfully cool, and overclock the cards, even at the 1.3v, and get between 1250-1280 core, and 1700+ on the memory, they should REALLY get the job doe for me. Then I'll be looking at a 5820k to really push them come Christmas time biggrin.gif
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post #37056 of 38704
Quote:
Originally Posted by shaka87 View Post

Hello, i have a Hd 7950 vapor x and the cooler`s closest port wont spin. Not event in automatic mode. It seems to be blocked por something. Is there a way i could fix it without replacement? Has this happened to any of you? Thanks in advance

Had a similar issue recently with my bottom crossfire 7950 vapor x. I mainly use TRIXX to overclock my cards. It turned out I had to change a setting in catalyst and the fan spun right back up turned out to be fine. I thought I did something when replacing GPU paste. Only the back fan would work on my bottom cf card. Just go to catalyst> AMD Overdrive> Enable Manual fan control> Make sure its enabled on both cards if you have CF> Set it to about 50%-100% range and check to see if all your fans are now spinning> If they are your fans are fine> Double check your fan profiles in TRIXX and save the new profile. Enjoy smile.gif

These cards perform excellent. I am not upgrading until AMD gives me a card w/ display port 1.3 for 8k gaming. I am currently outperforming a 290x/ GTX 980 and for less than half the cost. I am amazed how long these Vapor X cards have lasted me and still pushing awesome performance.

http://www.3dmark.com/3dm11/8658418


Edited by danycyo - 10/20/14 at 10:56pm
post #37057 of 38704
There's no doubt 2x 79** are still gettin' it done for people....

I am probably going to scoop a second 280x REALLY soon. They are going for so cheap right now....
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post #37058 of 38704
Can someone tell me what's up with having a blue PCB on a Sapphire 7970?

Also, I would like to know if there are any good sources to flashing a BIOS, having never done it before. There are obviously pros and cons. What do you do with a card with a messed up BIOS btw? Imagine I saved my current BIOS (back up). How to I bring it back to the card when it has a messed up BIOS? I have a boost edition so I think I have two BIOSes.
post #37059 of 38704
Okay, WOAH....

I don't know about the blue PCB, but several AMD partners make their on PCB's with different VRAM or power phases, VRM's, etc... or use the reference design in a different color just to give it their own "touch." Nothing new there.....

As far as the BIOS goes.....
What are you trying to achieve by flashing the BIOS?
I always, ALWAYS, advise against BIOS flashing unless the BIOS is intended for the card, AND offfers fixes to issues you are experiencing, or the manufacturer claims there is a performance gain of some kind by doing so.....

The only other reason for flashing BIOS would be if you have a high chance of unlocking shaders and/or higher voltage capabilities (doubtful on the 7970, since it's the top card of it's generation), and this should only be done with the acceptance that there is ALWAYS a chance of bricking, or semi-bricking your card.

I have been flashing BIOS since the ATI 9700 AGP, and I know the risks....
I have had many successful flashes of 6800 - 6800GT, x850 Pro ->X850xt so on and so forth through the ages, and it's always great when it works, but even with all my experience, have also semi-bricked cards before and had to perform "blind flashes" in which you use your own memory, command prompt knowledge, and general luck of the keystrokes until your PC finally boots back to video.... It's scary redface.gif

If you brick a card totally, you may be able to RMA, but if you don't KNOW for sure if it's hard or soft bricked, and the manufacturer is able to see you have flashed the card with an improper BIOS, then you are screwed....

Just a bit of advise from someone who has been doing BIOS mods on graphics cards for a LONG time.... Sometimes, you just don't tempt fate, unless the payout is good, and the odds are in your favor. thumb.gif
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post #37060 of 38704
Quote:
Originally Posted by incog View Post

Can someone tell me what's up with having a blue PCB on a Sapphire 7970?

Also, I would like to know if there are any good sources to flashing a BIOS, having never done it before. There are obviously pros and cons. What do you do with a card with a messed up BIOS btw? Imagine I saved my current BIOS (back up). How to I bring it back to the card when it has a messed up BIOS? I have a boost edition so I think I have two BIOSes.

http://www.overclock.net/t/1353325/tutorial-atiwinflash-how-to-flash-the-bios-of-your-ati-cards

That is the guide that got me started. If your flash goes south for some reason, you just turn your PC off, flip the BIOS switch and reboot. While powered on, you can flip the switch again to the failed bios and flash again. It sounds daunting, but 7970s are pretty easy.

If you want to get really funky with it, you can just use your original BIOS and edit it to suit your own needs:

http://www.techpowerup.com/forums/threads/vbe7-vbios-editor-for-radeon-hd-7000-series-cards.189089/

@Agent Smith1984 7970s with the dual BIOS are pretty easy to get right, and to recover. Allot of the woes of flashing are not a concern for this series.
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