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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 768

post #7671 of 38701
Quote:
Originally Posted by DeadSkull View Post

Wow this thread moves fast. Really interested in getting a high overclocking HD 7970. 1300Mhz on the core is a 40% overclock for 7970 while most GTX 680s max at 150-175mhz overclock.
Two MSI 7970 Lightnings right? Have you tried maxing the voltage to 1.3V? Whats the fanspeed for both cards and what is your ambient temperature like?

awe poop man, no they are just MSI ref designs with EK blocks on them. I havent tried maxing the voltage yet, still doing some testing right now. I will eventually though, but it honestly feels like the max OC for these guys is 1250 on the core and 1725 on the memory @ 1262mV.

Hopefully i can squeeze some more out of them with max voltage of 1300 becuase temps are oh so beautiful !
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post #7672 of 38701
Sry to bother u guys again but i still ain't sure if my OC at 1174mV from 0,993V is ok and will not damage my card too soon?
+vram temps 82C?
+core temps ~80C?
post #7673 of 38701
Quote:
Originally Posted by Andrazh View Post

Sry to bother u guys again but i still ain't sure if my OC at 1174mV from 0,993V is ok and will not damage my card too soon?
+vram temps 82C?
+core temps ~80C?

For a reference cooler those temps are to be expected i would imagine.
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post #7674 of 38701
Quote:
Originally Posted by Andrazh View Post

Sry to bother u guys again but i still ain't sure if my OC at 1174mV from 0,993V is ok and will not damage my card too soon?
+vram temps 82C?
+core temps ~80C?

You are adding more than 125mv from stock voltage... I wouldn't do that if I were you. 1120mv is not enough?
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post #7675 of 38701
post #7676 of 38701
Quote:
Originally Posted by Daffie82 View Post

You are adding more than 125mv from stock voltage... I wouldn't do that if I were you. 1120mv is not enough?

I want to make the most of the card so i could run BF3 at avg 60fps.

I figured that other cards have higher stock voltage because they have higher stock clock.
So this is not the case?
If I get lets say watercooling then i could only turn up the voltage by 125mV? Cuz if its at 80°C i dont mind as long the card dont break.
post #7677 of 38701
watercooling is a different story.
But for air I would not add more than 125mv. Specially with those temps you are getting.
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post #7678 of 38701
On 1 monitor, a 7970 at only 1100/1500 should max BF3 out. With 1125/1500 on 2 cards I can run ultra on 3 screens. 80c is fine but I wouldn't let it get much warmer, turn the fan up some.
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post #7679 of 38701
IMHO, there is something wrong with the Asus DCT2 design.

With stock air cooler, 1025/1400 was crashing in 3 seconds. LOL!

Installed a 60$ EK unviversal waterblock on it, some thermal pads on the back side directly on the VRMs, and now at stock voltage I can do 1175/1600 without any problems. Just ran Furmark 30 minutes and 3D Mark 11 10X in a row, played BF3 2 hours, and everything is rock-stable.

Temp is 33 celsius MAX on my chip at stock voltage 1175/1600 after 30 minutes of Furmark.

Asus. There is something wrong with your air cooler design. frown.gif

The ''mammoth tank'' is working much better! smile.gif

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post #7680 of 38701
New update

2600k@4.5ghz ,1300mV, core 1.270ghz, mem 1.825ghz , P score 16316

Going to test this again at 4.8ghz, 5.0ghz and 5.1ghz, hopefully will break 17k with my 5.1ghz cpu OC!



Became unstable and crashed at 1.280ghz core, and 1.825ghz mem.

Will have screens and 3dm11 results later today, its 6:02 AM....
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