Overclocking 7970, how much can I really get with it?

[b737lvr]

-SAPPHIRE Vapor-X Radeon HD7970 GHz Edition 3GB GDDR5
- CORSAIR TX Series CMPSU-650TX 650W
- i7-4770k 3.5GHz

How much room do I really have to Over clock? I don't wanna over do it. I'm not one to usually ask for help like this but I don't really eber over clock that much, in-fact hardly ever have I. I appreciate the input

 

[cuecuemore]

How far will the card let you go on the stock BIOS?

 

[bigpinkdragon286]

There are no guarantees. Don't have a 7970, but I do have the Tahiti based 7870 LE with the stock cooler, and it clocks to 1200 without issues with the voltage slider at +20% and the fan to 100% (machine is not in the same room and I don't have to hear it.) Between 1200 and 1250 it loses stability. It's not a temperature issue as the card stays under 70°C with the fan on full. Enjoy your silicon lottery. 🙂

Looks like other folks get between 1150 and 1250 on their 7970s.

An interesting thread with other folk's 7970 results:

http://hardforum.com/showthread.php?t=1665293

 

[socialassassin]

-SAPPHIRE Vapor-X Radeon HD7970 GHz Edition 3GB GDDR5
- CORSAIR TX Series CMPSU-650TX 650W
- i7-4770k 3.5GHz

How much room do I really have to Over clock? I don't wanna over do it. I'm not one to usually ask for help like this but I don't really eber over clock that much, in-fact hardly ever have I. I appreciate the input

I have a Sapphire 7970 and i can get about 1200/1700 on 1.25V (Using Sapphire Trixx)

 

[b737lvr]

1165 and 1540 is what's working fine right now. I tested on ARMA 3. Anything higher I'd see, rarely, a tiny artifact or two pop up in the trees every so often.

 

[b737lvr]

Wow, using TRIXX I got my clocks to 1175 1600 with 10% on the Board LI

 

[cuecuemore]

Have you tried disabling CCC/Trixx and using Afterburner so you can directly tweak the voltage? Every 7970 I've tried (6 of them) has made 1250 without issue tweaking the voltage directly in Afterburner. A good card can make 1325 on air.

 

[b737lvr]

I thought it was already at 1.256
http://gyazo.com/fdd545acab02b7bf0a82b4df159e2e94.png

edit: That's the default setting

 

[cuecuemore]

Ah, I see. It's too bad you don't have the original 7970, they actually OC'ed better than the GHz Edition. They, quite ironically, had better boards and lower stock voltages.

 

[b737lvr]

This one was cheaper than the reg version. It was on sale 20% off last week

 

[cuecuemore]

Good call then. 1175/1600 is very respectable.