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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 227

post #2261 of 38701
Quote:
Originally Posted by krazyatom View Post

my card OC poorly. I am only able to reach 1150mhz core clock with 1174v. I can't even reach 1170mhz core with 1300v max frown.gif
I ran OCCT to test stability and 1150mhz is good enough?
Quote:
Originally Posted by Scorpion667 View Post

Better than mine, OCCT would artifact at 1150Mhz with any voltage on my end.

You guys are on air right?
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post #2262 of 38701
Quote:
Originally Posted by krazyatom View Post

my card OC poorly. I am only able to reach 1150mhz core clock with 1174v. I can't even reach 1170mhz core with 1300v max frown.gif
I ran OCCT to test stability and 1150mhz is good enough?
Quote:
Originally Posted by Scorpion667 View Post

Better than mine, OCCT would artifact at 1150Mhz with any voltage on my end.

@krazyatom
I think anything higher than 1100MHz is very good result...Your 1150 is more than 20% of stock clock!!! Not many radeon models before was that good overclockers
Sometimes people from this forum doesnt test their overclocked card for stability. They run one of benchmarks like heaven or 3d mark or occt and that is enough for them... to post their >1250MHz success

@ rcfc89
you are right, that is headache, especially if someone stays at their stock air cooler biggrin.gif, but for most hardcore overclockers like me (maybe not hardcore wink.gif ) this is real real fun!!!

But we have almost 20% linear performance for free thumb.gif

Some companies taxes additional 100$-200$ in price for that redface.gif
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post #2263 of 38701
For anybody wondering about VRM temps, the new HWiNFO64 beta supports the sensors on them. It also monitors the voltage in/out and power draw.

The reference cooler keeps the VRMs well under the GPU temp. Mine never go above 60c under full load at stock. Kind of puts to bed the VRM overheating theory.

Pic for reference complete with mad paint skills. Seems to be 2 sensors for each card

700
Edited by Tslm - 1/27/12 at 12:10am
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post #2264 of 38701
Ok so here is my problem. I start up with a nice 1125/1575 on boot through CCC - GPUtool/Furmark, whatever will lockup and I'll get a display error or heavy artifacting. If I boot up with 1125/1575 and then go straight to trixx and apply, I noticed my base voltages go up form 0.799 to 0.849 in GPUZ. When going this route, I do not have the display driver has crashed problem.

Another problem, despite the method, it seems after I play about ~10 minutes of League of Legends the GPU fan will slow down to a stop and I get a black screen of death. I'm not sure how to solve this one. I am thinking this card is starting with a low base voltage. I think MSI AB detected 1024mv.
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post #2265 of 38701
Quote:
Originally Posted by tsm106 View Post

You guys are on air right?

Yes, air default fan profile.
Quote:
Originally Posted by lothar View Post

@krazyatom
I think anything higher than 1100MHz is very good result...Your 1150 is more than 20% of stock clock!!! Not many radeon models before was that good overclockers
Sometimes people from this forum doesnt test their overclocked card for stability. They run one of benchmarks like heaven or 3d mark or occt and that is enough for them... to post their >1250MHz success
@ rcfc89
you are right, that is headache, especially if someone stays at their stock air cooler biggrin.gif, but for most hardcore overclockers like me (maybe not hardcore wink.gif ) this is real real fun!!!
But we have almost 20% linear performance for free thumb.gif
Some companies taxes additional 100$-200$ in price for that redface.gif

Yes, 20% OC is great, but most of ppl in this thread are getting at least 1200mhz core clock frown.gif
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post #2266 of 38701
Quote:
Originally Posted by Tslm View Post

For anybody wondering about VRM temps, the new HWiNFO64 beta supports the sensors on them. It also monitors the voltage in/out and power draw.
The reference cooler keeps the VRMs well under the GPU temp. Mine never go above 60c under full load at stock. Kind of puts to bed the VRM overheating theory.
Pic for reference complete with mad paint skills. Seems to be 2 sensors for each card
700

I'd be interested in seeing those temps at max oc under load.
post #2267 of 38701
Quote:
Originally Posted by krazyatom View Post

Yes, air default fan profile.
Yes, 20% OC is great, but most of ppl in this thread are getting at least 1200mhz core clock frown.gif

The problem is that the 7970 is too good of an overclocker, so good that 1150mhz gives people sad faces. Hell, on Cayman 1150 was impossible on water. Remember to keep things in perspective. It's still a super overclock all things considered. You might have to go water to get that last 100mhz, but then again you have to ask if its worth it?
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post #2268 of 38701
Quote:
Originally Posted by tsm106 View Post

The problem is that the 7970 is too good of an overclocker, so good that 1150mhz gives people sad faces. Hell, on Cayman 1150 was impossible on water. Remember to keep things in perspective. It's still a super overclock all things considered. You might have to go water to get that last 100mhz, but then again you have to ask if its worth it?

Yes, 1150mhz core clock is good enough for me. I probably will never go water because I swap my GPUs very often.
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post #2269 of 38701
Quote:
Originally Posted by krazyatom View Post

Yes, 1150mhz core clock is good enough for me. I probably will never go water because I swap my GPUs very often.
Quote:
Originally Posted by Faksnima View Post

Ok so here is my problem. I start up with a nice 1125/1575 on boot through CCC - GPUtool/Furmark, whatever will lockup and I'll get a display error or heavy artifacting. If I boot up with 1125/1575 and then go straight to trixx and apply, I noticed my base voltages go up form 0.799 to 0.849 in GPUZ. When going this route, I do not have the display driver has crashed problem.
Another problem, despite the method, it seems after I play about ~10 minutes of League of Legends the GPU fan will slow down to a stop and I get a black screen of death. I'm not sure how to solve this one. I am thinking this card is starting with a low base voltage. I think MSI AB detected 1024mv.

any thoughts?
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post #2270 of 38701
Quote:
Originally Posted by krazyatom View Post

Yes, air default fan profile.
Yes, 20% OC is great, but most of ppl in this thread are getting at least 1200mhz core clock frown.gif

I think they didn't adeqately test and verify stability at that clock...

My card can run most benchmarks on 1200-1250 but at much much higer voltage then my casual/everyday/24/7 setting 1180/1690 at 1.137V/1.7V
overvolting higher than mentioned +125mV generates large jump in power consumption and temperatures... you personally experienced that with your PSU (good PSU anyway, dont change it wink.gif )

I think that my "stable" 1225MHz setting or 1250-1260MHz on water block is not worth expenses (money, power, temperature, space)

Buying very good water block (not "EK or Coolance) could give me additional 8-9% of performance - this doesnt make sense for me... better invest these 100-200$ in good SSD

EDIT: oh... I forgot, my card has VID 1.05V and that overhyped ASIC quality value is 82,9%

HardOCP quotes below:
Quote:
One thing we are learning is that none of the video cards we have evaluated so far are coming close to the highest stable overclock on our reference AMD Radeon HD 7970 video card. We achieved a high 1.26GHz stable overclock, but this seems to be the exception at this point in time. With a customized XFX R7970 we have achieved 1.150GHz, and with this ASUS Radeon HD 7970 we have achieved 1.125GHz. It would seem right upwards of 1.1GHz is the norm so far. As we evaluate more video cards we will see how they all line up in terms of overclocking ability.
Quote:
(Kyle's Note: AMD was very forthcoming about the 7970 GPU clocks when we first briefed about the new technology. It explained that almost all GPUs would do 1000MHz, a lot would do 1100MHz, and at that time of talking to AMD, it even had a 1200MHz sample running on its test benches. I have seen a lot of "[H] got a cherry picked card," or something to that effect. Well, I have been doing this for well over a decade, and I have yet to see us get a cherry picked card from AMD, I think it was simply our luck of the draw for a change. 1200MHz does seem a bit excessive, but I would suggest that 1100MHz is going to be achievable for many of our 7970 owners. Good luck and happy OCing!)

http://www.hardocp.com/article/2012/01/25/asus_radeon_hd_7970_video_card_review/9
Edited by lothar - 1/27/12 at 2:14am
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