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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 48

post #471 of 38701
Guys. 1350/1750 with an EK waterblock here. Nothing fancy. Tiborr of EK. No volt mods. Vanilla OC. smile.gif

1400 is not far. The 7970 is really cold sensitive. The lower the temp, the higher the OC. thumb.gif

What a beast.

375
    
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post #472 of 38701
Quote:
Originally Posted by Levesque View Post

Guys. 1350/1750 with an EK waterblock here. Nothing fancy. Tiborr of EK. No volt mods. Vanilla OC. smile.gif
1400 is not far. The 7970 is really cold sensitive. The lower the temp, the higher the OC. thumb.gif
What a beast.
375

Sweet clocks. Good progress.

What are you using for voltage adjustment?
    
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post #473 of 38701
1350mhz pretty sweet.
how much did it do on air?
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post #474 of 38701
Quote:
Originally Posted by Evil Penguin View Post

Quote:
Originally Posted by wTheOnew View Post

GPU-Z Validation at 1125 / 7000

Stable enough to play games. Throws a couple errors every minute or so when it gets above 70C in OCCT. Can't wait for the water blocks to come out so I can keep this thing cool without freezing to death myself. rolleyes.gif


Edit: Just realized GPU-Z has the bus interface wrong for me. Hmm.
It's not the temp... It needs more voltage and without PowerTune screwing with it.

It's something related directly to the temp. It doesn't throw any errors until it gets that warm. I can run it for 5 minutes and soon as it hit 70 it starts and gets worse as it gets hotter. Stop the test restart it immediately before it starts cooling down and it will throw errors almost immediately. Wait a few minutes for it to cool off and I can run it for a few minutes again until it gets too hot. I guess I'll be able to be more sure when I can get it under water and can keep it constantly below 60. I like making graphs; maybe I'll plot out temp vs errors tonight.

OCCT on 8 did seems to have a wall at 443. 0-7 all seem to increase the framerate proportionally to the core/mem overclock. Would think I would hit a wall on all of them if PowerTune of error checking was getting in the way. On 0, taking the mem from 1500-1750 bumped the framerate from ~750 to ~830. 16% increase on memory led to 11% increase in framerate with every 25MHZ increase giving me an extra 7-10fps more. It was a very consistent increase. (Ballparking this from what I remember.)

Not my first foray into overclocking by any stretch, but it is my first with PowerTune. Any way to kill it completely or at least bump it up a bit to see if my results change at all? I didn't notice anything specific that I could point at and say screw you PowerTune, though I, did notice a lot of VDroop. About 50-100mv at full load at stock speeds all the way to where I have it now.

Also, anyone ever watch gpu utilization for Vantage? Mine averages about 75-80% for the tests. 100% at the beginning and end of the tests but down to 50-70% in the middle. Never paid attention to the 5850s to compare.

Still can't get GPU Tweak to work right. Downloaded the new version which stopped the stuttering it had before but now it wont let the card go into 3D clocks at all. rolleyes.gif
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post #475 of 38701
Quote:
Originally Posted by Levesque View Post

Guys. 1350/1750 with an EK waterblock here. Nothing fancy. Tiborr of EK. No volt mods. Vanilla OC. smile.gif
1400 is not far. The 7970 is really cold sensitive. The lower the temp, the higher the OC. thumb.gif
What a beast.
375

Wow if a WC 7970 is cable of that then a single card would work great for me ! Thanks for sharing the info smile.gif
post #476 of 38701
Using GPU tool to test for artifacts and render missing:

100% stable results:

I hit 1065/1575mhz -
Default fan profile (about 50-55%)
Temps: 80-86c

I was able to hit 1115/1600 mhz -
Fans on 100%
Temps 56-57c

Water will give you about 40-45c load. Imagine the headroom there.

So the verdict is................... If your going for huge overclocking and any over voltage whatsoever....
Get them GPU's under water.

Mild overclocks, (925-1125) on default voltage should be ok.
Edited by Denim-187 - 1/12/12 at 7:53am
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post #477 of 38701
At the moment, is the 7970 crossfire compatible with any card other than another 7970?
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post #478 of 38701
Does anyone know the max safe voltage for these cards? (If keeping temps ok).

Also, is there a way to increase the max default clock in ASUS Tweak, like in AB?
    
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post #479 of 38701
Hey guys heads up when ordering GPU block to USA you can order directly from EK blocks is much cheaper. I paid $123.79 USD shipped with paypal. Its because the Euro exchange is in favor of USD right now. A year ago you would have never thought about ordering direct from EK to save mone. They ship with 3 day DHL shipping.
 
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post #480 of 38701
For anyone that uses Swiftech equipment for water-cooling I found out some information in regards to their 7900 plans in their forums. They are currently testing the universal MCW80/82 water-block and say they will probably offer a new base plate to make it compatible. They also have plans to release a full cover block soon and will announce it after they get back from CES.

On another note, I'm super stoked to hear Levesque got his core up to 1350 on water. That is really unbelievable! I can't wait.
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