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How to overclock a 7850 past 1050MHz?

It looks like 1190/5800 is about the limit for me @ 1.25V but it never goes over 55 degrees with fans at 40% when running Heaven DX11. At these settings I'm getting a 1420 benchmark score with 4xAA, Normal tessellation @ 1920x1080 res.

Is that voltage safe considering the temps I'm getting, or should I run something more stressful to test temps?
 
G-Sharp said:
It looks like 1190/5800 is about the limit for me @ 1.25V but it never goes over 55 degrees with fans at 40% when running Heaven DX11. At these settings I'm getting a 1420 benchmark score with 4xAA, Normal tessellation @ 1920x1080 res.

Is that voltage safe considering the temps I'm getting, or should I run something more stressful to test temps?
Click to expand...

i really don't believe that on the fans. you may want to try and run another program. i have 1200/5800 with fans on auto, and i think it gets up to 47%, but temps top out at 71c under 100% load for an hour. i have the same card as you.
 
Hey, Signed up to this forum after buying this card for my pc after reading the thread.

I've got a sapphire non-oc card with 12.4 drivers and I've managed to get 1200/5000 @ 1.170v

And it seems to be stable, ran through heaven a few times without crashing and played some sniper elite (crashed on 1.16v but seems ok on 1.17v) it needs more testing though. Temp's go upto max about 65C with furmark on for 20 minutes and doesn't go past about 60C during gaming.

It's a shame I can't get the memory clocks any higher, as soon as I try bump them past 5000 I get crashes. I did manage to get them to 5400 without changing the core until the performance started to drop.
 
Quick question guys, passing the benchmark in heaven doesnt mean it's stable in game right? Cause my MSI 7850 at 1200/5800 with 1.16v ran 1 time heaven without crashing but crashed after like 20mins of Crysis 2. Maybe I should set my voltage higher and try again?
 
I just recently bought an XFX 7850. I wiped all of the drivers off of my pc, downloaded Asus GPU Tweak, and downloaded the 12.4 Beta Display Drivers (but nothing else, so no CCC). However, when I go to advanced mode in GPUTweak, I can check the Overclocking Enhancement thing, but I don't have an option to change the voltage. The voltage doesn't even show up on the screen (next to GPU Clock, Memory Clock, and Fan Speed.) Any ideas why this would happening and how I could make the Voltage adjustable?
 
VampyMage said:
Quick question guys, passing the benchmark in heaven doesnt mean it's stable in game right? Cause my MSI 7850 at 1200/5800 with 1.16v ran 1 time heaven without crashing but crashed after like 20mins of Crysis 2. Maybe I should set my voltage higher and try again?
Click to expand...

You are correct. Heaven is just an indicator of stability. You will need to test in other games to ensure complete stability. Crysis 2 is a good test as it's very hard on the card.



In other news, had a go at getting a heaven bench at 1290/6200 but it wasn't having it. Doesn't like running the high memory AND high GPU at the same time unfortunately.

So I've settled for 1225/6000 @ 1.17V as my day to day OC.
 
How do you know if the settings you are using are safe?

I remember trying to overclock a GPU in the past using afterburner and the screen went blue with white lines. That shook me up so I didn't try again.
 
Just don't go over 1.225V and you'll be fine (probably safe past that, but tbh its not worth risking).

If you take the core too high it'll just not work, it won't break the card, a safe limit is 1300 though, no ones managed to get a card stable at that speed, so stick to under that and you're good.

As for memory it has built in error correction, so all you need to do is go up in 100MHz jumps and keep track of if your performance increases or not. If it's increasing then error correction isn't kicking in, so it should be safe and stable. As soon as you see the performance level off or start to dip, back off a 100MHz or so.
 
HeX said:
It makes it highly unlikely. Unless its really pushed. It'll just slow down your card performance until you dial it back.
Click to expand...

Hmm, maybe my card isn't as stable as I though it was. I've been able to get upto 1375mhz memory on stock cores before I started to lose performance but when I got my core upto 1200Mhz any sort of change to the memory clocks seemed to make it crash. Do you think that maybe the Core is too high for my card or I have too little voltage?
 
I installed Sniper Elite V2 today and the game crashes. I tried to reduce the quality but the game will eventually crash no matter what setting I have.

Do I downclock the card or up the voltage? One thing I noticed that whilst playing I get the same spikes showing in Asus GPU Tweek.

However, after googling it seems that crashes are common in this game, so maybe it's the game's fault. I am running all the latest monitor, gpu, direct X and windows drivers/service packs.

I played a long session of BF3 yesterday and the card was fine.
 
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Arron17 said:
Hmm, maybe my card isn't as stable as I though it was. I've been able to get upto 1375mhz memory on stock cores before I started to lose performance but when I got my core upto 1200Mhz any sort of change to the memory clocks seemed to make it crash. Do you think that maybe the Core is too high for my card or I have too little voltage?
Click to expand...

It's a balancing act. You'll find your max memory OC will drop as your core OC increases.

Best thing to do is get your core as high as possible first (as this gives the much greater gains), and then work your memory up as as you can while running your GPU OC.

My card for example will run 1200/6200 fine, but will crash constantly at 1290/6200, however 1290/5800 is fine.

TBH memory speed isn't much of an issue, from my testing every 100MHz memory speed nets you about 0.33fps (in heaven). So it's not a massive deal breaker if you have to run it at a lower speed.

So in a nutshell, get your core as high as poss, then worry about your mem speed after.
 
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majnu said:
I installed Sniper Elite V2 today and the game crashes. I tried to reduce the quality but the game will eventually crash no matter what setting I have.

Do I downclock the card or up the voltage? One thing I noticed that whilst playing I get the same spikes showing in Asus GPU Tweek.

However, after googling it seems that crashes are common in this game, so maybe it's the game's fault. I am running all the latest monitor, gpu, direct X and windows drivers/service packs.

I played a long session of BF3 yesterday and the card was fine.
Click to expand...

If BF3 is fine, I'd say it was Sniper Elite that is buggy tbh.

What do you mean by GPU spikes?
 
Ok cheers. What would you say is the best program to bench in? Because I managed to get 1200/1375 @ 1.16v in 3dMark11 but as soon as I loaded up heaven it crashed. And then the best I could get consistently in heaven was 1200/1250 @ 1.16v and then I loaded up sniper elite and it crashed almost straight away.
 
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