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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1780

post #17791 of 38701
Quote:
Originally Posted by ss1274 View Post

Hey, this is my first post in this thread!thumb.gif
So I finally upgraded my GTX 560Ti to XFX HD 7970 GHz Edition (this card). I am very happy with its out-of-the-box performance, I am able to max out all my games at 1200p. The cooling is also good while staying quiet till ~60% fan speed. biggrin.gif I will probably stick to its stock speeds for the time being, but I would like to explore the maximum potential of my card. ASIC quality is rather poor, just 68.2%. sadsmiley.gif
I thought overclocking the HD 7970 would be like a play in the park, but I find it rather more difficult and confusing than on my old GTX 560Ti.
First thing of all, how can I know what is my real core voltage under load? GPU-Z, Hwinfo64 and Afterburner all give different readings. They agree on the idle voltage, though. wackosmiley.gif

At stock voltage (which is 1.218V I guess), I am stable at 1175/1500 MHz in Heaven, 3DMark 11 and BF3. 1200MHz gave artifacts in Heaven and BF3, but passed 3dMark 11. I am focusing on core clock, so I have not fiddled with the memory yet (I tried 1175/1600MHz once and everything seemed okay in BF3 wink.gif). Temps are not to worry about, 64 C on the core and 71 and 54 C on VRM1 and VRM2, respectively.
My question is: How can I get voltage control? Am I doing something wrong? I can move the slider in AB all the way to 1300mV, but it has no effect on my voltage which stays at 1.218V in AB and shows 1.175-1.200V in GPU-Z. I would like to reach 1200+, but it seems I would need some extra volts. I thought the GE cards had core voltage unlocked.
Any help or advice is much appreciated. smile.gif
EDIT: Direct links to screenies.

GPU-Z and HWinfo report the actual voltage, AB tells you the nominal voltage. 1.218V after vdroop is exactly what you're seeing with those other programs.

The GE cards are a bit tricky when it comes to voltage control. AB seems to have control over the non-boost voltage, but not the boost voltage. I believe setting AB to use constant voltage will fix that but you'll lose the lower idle voltage. Sapphire's Trixx has been reported to be able to change the boost voltage directly, at least with Sapphire's own GE cards and the latest v4.4.0 beta version of the software.

And don't worry about the ASIC quality, your card seems to be a very decent clocker. thumb.gif
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post #17792 of 38701
Quote:
Originally Posted by LoneWolf3574 View Post

Yes, I have each display connected via DVI to each card. Each display is only capable of either vga or dvi, so with that being said, would it be better to get the adapter for the displayport or the hdmi? I've pushed my luck WAY to far with the wife buying this setup (cards plus wc blocks & accessories) for her to let me get ANOTHER pair of monitors after only a year and a half.

Yes, that's your problem.
When in crossfire you can only run monitors off the first card. thumb.gif
 
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post #17793 of 38701
Quote:
Originally Posted by raghu78 View Post

Try the latest version of sapphire trixx. some recent batches of HD 7970 cards are voltage locked. Anyway 1175 Mhz at stock voltage is very good and enough to play any game at 1200p at max settings at 60+ fps. Your core and VRM temps are good. About MSI afterburner check out this article
http://www.overclock.net/t/641299/guide-to-enabling-unofficial-overclocking-in-msi-afterburner

I tried the modded version of TriXX 4.0.4b, and to my surprise it reads 1256mV as the default VDDC. This is the same VDDC value as Hwinfo64 shows under load. Unfortunately, upping the voltage to 1.3 does not seem to do anything at all. The memory voltage is fully functional though. Why does AB show 1162mV and TriXX 1256mv?

Also, do I need to enable unofficial overclocking mode in AB even though my CCC limits are already extended?
post #17794 of 38701
Quote:
Originally Posted by specopsFI View Post

GPU-Z and HWinfo report the actual voltage, AB tells you the nominal voltage. 1.218V after vdroop is exactly what you're seeing with those other programs.
The GE cards are a bit tricky when it comes to voltage control. AB seems to have control over the non-boost voltage, but not the boost voltage. I believe setting AB to use constant voltage will fix that but you'll lose the lower idle voltage. Sapphire's Trixx has been reported to be able to change the boost voltage directly, at least with Sapphire's own GE cards and the latest v4.4.0 beta version of the software.
And don't worry about the ASIC quality, your card seems to be a very decent clocker. thumb.gif

Ah, now I understand the voltage readings. Thanks for explaining. I never counted for vdroop, I did not even know graphics cards experience vdroop like CPUs. tongue.gif Yes, using constant voltage eliminates the voltage problem. I can run 1250 mV or whatever constantly, but I do not want to run like that 24/7 lol.

I already tried Trixx without success. Thanks, I am very happy with the overclock on stock voltage but like every OCN dude I want to push it more.biggrin.gif
post #17795 of 38701
So guys according to the newest review on newegg the Sapphire 7950's are voltage locked now?
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202006

If the 7950's are getting voltage locked now, I might go for the Sapphire 7970 or Gigabyte 7970 then (the $399 ones). Out of those can anyone help me decide on which one to get? Heard a lot of the Gigabytes are voltage locked and have a coil whine, so should I steer clear from them? Gonna grab one around Black Friday thumb.gif
Edited by apav - 11/10/12 at 4:24am
post #17796 of 38701
Quote:
Originally Posted by apav View Post

So guys according to the newest review on newegg the Sapphire 7950's are voltage locked now?
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202006
If the 7950's are getting voltage locked now, I might go for the Sapphire 7970 or Gigabyte 7970 then (the $399 ones). Out of those can anyone help me decide on which one to get? Heard a lot of the Gigabytes are voltage locked and have a coil whine, so should I steer clear from them? Gonna grab one around Black Friday thumb.gif

Gigabytes cooling is second to none. Not to sound like a fanboy but Ive said that in a few posts. Im very impressed with the Gigabyte cards.
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post #17797 of 38701
Quote:
Originally Posted by twitch_alucard View Post

Gigabytes cooling is second to none. Not to sound like a fanboy but Ive said that in a few posts. Im very impressed with the Gigabyte cards.

Yea I've heard that. I'm just worried about the coil whine with those cards, that would be very annoying to put up with!
post #17798 of 38701
Quote:
Originally Posted by twitch_alucard View Post

Try checking your routers firmware. I just recently had youtube/flash issues and tried everything myself and the one thing and last thing I would have thought was the problem. As soon as I updated my firmware everything worked as it should.

The same firmware was working without a single issue when i had my GTX680 like 3 months. Its flash/amd drivers 99% sure.
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post #17799 of 38701
Quote:
Originally Posted by psyside View Post

The same firmware was working without a single issue when i had my GTX680 like 3 months. Its flash/amd drivers 99% sure.

Same for me man, everything was working peachy on my router and then randomly one day it just stopped working. Youtube wouldnt load any videos and when it did it took a few times of stabbing stop and play over and over. Seriously man just check at least. I did everything I could possibly think of before I finally checked that. This was just recently to, like last month.
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post #17800 of 38701
Quote:
Originally Posted by apav View Post

Yea I've heard that. I'm just worried about the coil whine with those cards, that would be very annoying to put up with!

I have a 7950 Gigabyte so I wouldnt really know about the 7970's but to my understanding they all have a bit of coil whine. I have 0 with my card even with its massive overclock. My fans dont even go over 60% and my temps are at 53 max under load.
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