How to overclock a 7850 past 1050MHz?

Protomize · 28 Jun 2012 at 00:08

majnu said:
kombuster is unnecessary, it works the card too much for my liking. Running a few benches in heaven and playing a game is all I would do. The Heaven score will give an indication on how many fps increase you get over stock.

Very true, Kombuster is the equivalent to Prime95 for CPU's. I like them because they give a worse case scenario load on your chips which guarantees you that they will be stable through anything else if they past that load.

LexLuthor · 28 Jun 2012 at 02:06

zijin_cheng said:
You said no more than 1128mV for stock air cooler? Thing is, my stock volts are 1138mV, and temps at stock 860/1210 are 65 max.

I'm pretty sure earlier in this thread you have an ASUS 7850 as well, correct me if I'm wrong, but you got 65oC max load temperature at 1150 core? See I got 75oC max load temperature at 1150 core. I'm trolling all the forums hoping that its my case airflow that's causing the massively high temperatures, because I only have 1 intake fan at the top and the DCII's fans are pointing downwards.

No, you missread my post..

My stock voltage is 1138mV, and my OC voltage is 1220mV..

"and having it at 1200/1400 put the voltage up to 1220mV"

And yes, I do have the same card as you, an Asus 7850 DC2.. And my 65º max temps are at full load AND OCed.. Not at stock..
My guess, you have a poor case airflow and high ambient temps.. :rolleyes:

Maybe a mistake, but you have only one intake fan "at the top"????..
Heat rises, so having it as an intake it's probably a fail..
Maybe it's time to do a fan readjust in your case.. Theoretically, you should have fans getting fresh air at front and side, and having pull hot air out at top and back... Maybe there's your issue..

This card runs very cool compared to stock ones.. Your temps aren't bad at all, just maybe could run cooler..

Best regards..

zijin_cheng · 28 Jun 2012 at 02:28

LexLuthor said:
No, you missread my post..
My stock voltage is 1138mV, and my OC voltage is 1220mV..

"and having it at 1200/1400 put the voltage up to 1220mV"

And yes, I do have the same card as you, an Asus 7850 DC2.. And my 65º max temps are at full load AND OCed.. Not at stock..
My guess, you have a poor case airflow and high ambient temps..
Maybe a mistake, but you have only one intake fan "at the top"????..
Heat rises, so having it as an intake it's probably a fail..
Maybe it's time to do a fan readjust in your case.. Theoretically, you should have fans getting fresh air at front and side, and having pull hot air out at top and back... Maybe there's your issue..

This card runs very cool compared to stock ones.. Your temps aren't bad at all, just maybe could run cooler..

Best regards..

Thanks, that actually puts my mind at ease, but 95C at 1200/4840/1170 is average? That sounds a little high, I've read on other forums (forgot specifics) overclock, anandtech that people who have the ASUS DCII 7850 get 1200-1250/6000/1250mV at a max of 65-70oC.

I really hope its my case airflow... if it is I will be the happiest guy on earth, (until I hit 4.5ghz on my 3570k)

krooton · 28 Jun 2012 at 10:05

I use a voltage of 1160 and top out at 75ºC at 75% fan speed, stock VTX cooler.

Johnz0r · 28 Jun 2012 at 11:24

krooton said:
I use a voltage of 1160 and top out at 75ºC at 75% fan speed, stock VTX cooler.

I don't know how you guys can put up with those really high fan speeds. I'm running 1150/5800 and not going over 65. Using a sapphire 7850 OC edition.

leoncao · 28 Jun 2012 at 17:38

This is insane OC! thank you for sharing

krooton · 28 Jun 2012 at 18:05

Johnz0r said:
I don't know how you guys can put up with those really high fan speeds. I'm running 1150/5800 and not going over 65. Using a sapphire 7850 OC edition.

Headphones

LexLuthor · 28 Jun 2012 at 18:57

zijin_cheng said:
.., but 95C at 1200/4840/1170 is average? That sounds a little high, ...

Indeed it is high..
Even when this new chip generation could run as hot as 100ºC (being safe temp up to 105º, if I remember correctly), you shouldn't have reached those temps, unless something is wrong with your airflow/ambient temps..
Despite I used to have a 6870 stock running as high as 102ºC any given day (full load at games/benchmarks) and never had an issue (good XFX manufacture

), it's not a good idea to do it.. Chip can be damage.. Mine didn't, but maybe was luck..
My advice: do not run your card that hot.. Keep it under 80ºC until you can get better case airflow/lower ambient temps..

Best regards..

Protomize · 29 Jun 2012 at 06:06

kharma45 · 29 Jun 2012 at 13:16

This is mine at 1210MHz/1450MHz (1.175v) with the latest drivers.

http://i.minus.com/ibpaNZ1FnAulh0.jpg

zijin_cheng · 30 Jun 2012 at 03:28

Finally figured out how to post a screenie

This is on 1210/5500/1180, max temps of 72oC, so very happy camper

McBain · 30 Jun 2012 at 10:08

Don't suppose anyone has a copy of the MSI Twin Fozr 3 Bios do they by any chance? Managed to lose my backup

kharma45 · 30 Jun 2012 at 14:07

Anyone tried the new 12.7 betas?

I seem to have a massive performance drop with them, went from 1471 in Heaven on 12.6 stable release down to around 1100-ish with 12.7 :\

cmd1989 · 30 Jun 2012 at 14:10

I've had a Sapphire 7850 delivered today and going to be installing it later on today (at work at the mo

). I'm quite new to overclocking and have read a fair bit of this thread which actually made up my mind on going with the 7850, but started to run into what to me is a load of waffle

.

Would anyone be able to guide me as to which programs I need to use to get a decent overclock? And how should I approach it? Should I keep stock volts and up the core by 10 each time until it crashes and then start upping the volts? and what are the max voltage and temps I should go up to?

kharma45 · 30 Jun 2012 at 14:24

cmd1989 said:
I've had a Sapphire 7850 delivered today and going to be installing it later on today (at work at the mo ). I'm quite new to overclocking and have read a fair bit of this thread which actually made up my mind on going with the 7850, but started to run into what to me is a load of waffle .

Would anyone be able to guide me as to which programs I need to use to get a decent overclock? And how should I approach it? Should I keep stock volts and up the core by 10 each time until it crashes and then start upping the volts? and what are the max voltage and temps I should go up to?

You need to get ASUS GPU Tweak as the others don't let you control the voltage.

What I did first of all was just stuck mine up to 1200MHz straight away and 1.195v and ran Heaven to see if it could handle it, and I tweaked around from there.

Ended up sticking with the 1200MHz clock and got it down to 1.175v on my MSI TF3.

cmd1989 · 30 Jun 2012 at 15:13

Cool, thanks mate, will try that when I get home!

hogofwar · 30 Jun 2012 at 21:16

Is there anyway to stop Trixx resetting the overclock on supposed system shutdown failure? I know it is for safety reasons but it get annoying, especially as my computer takes a very long time to shut down, if it does at all, forcing me to force a shutdown which resets the overclock as well.

It's incredibly annoying sometimes.

kharma45 · 30 Jun 2012 at 21:32

Went back to the 12.4 drivers, 12.6 and 12.7 beta caused me a lot of brown screen crashes.

Ion Sights · 1 Jul 2012 at 11:11

yeah I'm interested in hearing what people think about the new 12.6 drivers. Also just read this

http://benchmark3d.com/amd-catalyst-12-6-whql-12-7-beta-june-26-benchmark/4

Schizophonic · 1 Jul 2012 at 15:35

Does anyone know whats the stock voltage on the MSI R7850? At the moment when using GPU tweak, its defaulted at 1210. Safe?