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How to overclock a 7850 past 1050MHz?

oweneades said:
Thanks for the advice RE: Afterburner. Seems odd that it can't control the voltage.

I will try out Trixx.

So far the card is happy at 1150/5800 but the scaling at 3600x1920 beyond the CCC max clocks is relatively poor. Upping the memory to 6200 was perfectly stable but yielded no benefits. 50Mhz jump in the core clock gave me 0.5FPS which isn't really worth it.

I can only presume it is becoming shader bound with increases in clock speed only able to do so much.

Crossfire is tempting but at the current prices I would rather just pay an extra £50 and get a HD7950.
Click to expand...

An overclocked 7870 would have probably done the trick but it's worth you getting a 7950 now.
 
Hi all,
I bought the HIS IceQ X 2gb card last week as it was on offer, and i'm pleased with it so far:


one thing i have noticed and that's the gpu model- its gone from a 8.98.0 to a 9.1.0.0 version?
I take it that's just a driver update or something?
 
muzzler said:
Hi all,
I bought the HIS IceQ X 2gb card last week as it was on offer, and i'm pleased with it so far:


one thing i have noticed and that's the gpu model- its gone from a 8.98.0 to a 9.1.0.0 version?
I take it that's just a driver update or something?
Click to expand...
probably the catalyst version not the gpu model
 
Would be interesting to see what power supply the highest overclocks were using. Whilst it is a lottery for the GPU chip I still believe the PSU makes a big difference as well.
 
Septym said:
Would be interesting to see what power supply the highest overclocks were using. Whilst it is a lottery for the GPU chip I still believe the PSU makes a big difference as well.
Click to expand...
I use a Corsair HX850W within my main "test system". I have had one 7850 running 1350MHz rock stable on air, another that couldn't reach 1100MHz, and 3 others that reached figiures somewhere between. Memory clocks also ranged from 1325MHz to 1525MHz, and the fastest GPU did not also have the fastest memory.

In my opinion GPU quality is absolutely key. A good GPU will run faster at a given voltage, even if the PSU or other variables hold you back a bit. Unfortunately GPU quality is completely ramdon. My best overclocker was a vanilla Powercolor reference 7850, the worst was the most expensive and best cooled MSI TF4.

I also believe that high ASIC quality increases the chances of a good GPU. My best 7850 was 84%, the worst was 67% (I think). I also have a high ASIC 7870 which performs excellently as well (1325MHz GPU stable, benchable at 1360MHz).

I play with too many toys:).
 
Very true, but in reviews and on forums around the net I've seen it a few times where people have stated buying a better power supply has allowed them to overclock further.
 
Winky_The_Winking_Turtle said:
What's the best fan profile? Attempted... but didn't go so well, one second the fan would be almost silent, the next sounding like a jet engine (Not really, but quite noisy, i could tolerate it :P)
Click to expand...
Using Afterburner, I set 30% up until 40deg, then a straight upward slope hitting 100% at 90deg. Card never goes above 65deg during gaming at about 50% fan.

So long as temps stay below 80deg, keep the fan as quiet as you like.
 
I have my 7850 currently overclocked to 1050/1300 on 1139v (a slight bump from stock volts) and I've recently reinstalled my system. Today, my video driver (catalyst 12.6) crashed when I was surfing the web. It's literally the first time this has happened to me and I've noticed that Asus GPU Tweak registered GPU usage spiking to 99% at the moment of the crash:/ What could be wrong? The games are fine. I'm on Firefox 15.1 and the usage is spiking from time to time to about 83%. I don't remember this happening before;(
 
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Amatsubu said:
I have my 7850 currently overclocked to 1050/1300 on 1139v (a slight bump from stock volts) and I've recently reinstalled my system. Today, my video driver (catalyst 12.6) crashed when I was surfing the web. It's literally the first time this has happened to me and I've noticed that Asus GPU Tweak registered GPU usage spiking to 99% at the moment of the crash:/ What could be wrong? The games are fine. I'm on Firefox 15.1 and the usage is spiking from time to time to about 83%. I don't remember this happening before;(
Click to expand...

It's a common problem with the new firefox and ati drivers apparently.
 
Amatsubu said:
I have my 7850 currently overclocked to 1050/1300 on 1139v (a slight bump from stock volts) and I've recently reinstalled my system. Today, my video driver (catalyst 12.6) crashed when I was surfing the web. It's literally the first time this has happened to me and I've noticed that Asus GPU Tweak registered GPU usage spiking to 99% at the moment of the crash:/ What could be wrong? The games are fine. I'm on Firefox 15.1 and the usage is spiking from time to time to about 83%. I don't remember this happening before;(
Click to expand...
If it has only crashed once, don't worry too much about it. It may have just been a driver bug. If it happens again, return the card to stock settings and check for stability.
 
[QUOTEUK;22883480]I use a Corsair HX850W within my main "test system". I have had one 7850 running 1350MHz rock stable on air, another that couldn't reach 1100MHz, and 3 others that reached figiures somewhere between. Memory clocks also ranged from 1325MHz to 1525MHz, and the fastest GPU did not also have the fastest memory.

In my opinion GPU quality is absolutely key. A good GPU will run faster at a given voltage, even if the PSU or other variables hold you back a bit. Unfortunately GPU quality is completely ramdon. My best overclocker was a vanilla Powercolor reference 7850, the worst was the most expensive and best cooled MSI TF4.

I also believe that high ASIC quality increases the chances of a good GPU. My best 7850 was 84%, the worst was 67% (I think). I also have a high ASIC 7870 which performs excellently as well (1325MHz GPU stable, benchable at 1360MHz).

I play with too many toys:).[/QUOTE]

You might just have the fastest 7850. Have you get any benchmarks at 1350?
 
iBSOD said:
You might just have the fastest 7850. Have you get any benchmarks at 1350?
Click to expand...
There are some 1376MHz benches linked at the bottom of my original post - see post #1 of this thread:). There are also benches of it at varying clocks throughout the thread,

Here's a 3DMark11 1400MHz bench I prepared earlier. The score is roughtly the same as a 7870 @ 1300MHz or a 7970 at stock. Card was far from stable at 1400MHz but could pass most benchmarks. 1350MHz was stable with an after market Accelero TT cooler.

According to Futiremark my 7850 was rated as 15th fastest for a single card. It may have been my lowly 2500K not being able to hack it against 6GHz 3770's.

edit: The 7850 in question has now moved to it's new owner where it sits within a crossfire setup run at stock speeds:). The current 1360MHz benchable 7870 I am testing will be off to it's new owner next week. If anyone wants some 7870 benches, let me know quick.
 
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Hi Guys,

Think I've got a bit of a donkey for overclocking as can only get 1040 at stock volts!
1050 @ 1.14V but at 1.2V I can only get to 1080 :-(
Max temps of about 60c

I upped the power offset to 20%, ran driver sweep before installing the latest drivers (12.8) along with CAP1.3 and haven't installed CCC or Afterburner.

I keep getting d3d11appwindow swap_window() device removed if I push it over the above settings in GPU Tweak along with Heaven freezing or black screens.

Is there anything else I can do or just accept that's the way it is sometimes?!

Any suggestions gratefully received....

EDIT - I've left the memory at stock if that makes any difference. ASIC 76.8
 
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d3d11appwindow swap_window() device removed That basically means the driver has crashed, welcome to the silicon lottery. I've never had a good overclocker.
 
Some of you guys are lucky just got my card and its the stock voltage is at 1.2mv and ASIC is at 70%!!!:mad:
 
at3k- said:
Some of you guys are lucky just got my card and its the stock voltage is at 1.2mv and ASIC is at 70%!!!:mad:
Click to expand...
isn't 1.2v like, dangerous for 24/7? or 1.2v is not equal in terms of damaging power for every 7850 gpu, so that means 1.038v like mine and cards like yours get damaged the same by electromigration at 1.2v? Maybe you can rma the card and get another, 1.2v seems way too high for me, but maybe first try to overclock, maybe youll get lucky and youll see that 1200mhz is possible on your card at those volts.
 
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