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How to overclock a 7850 past 1050MHz?

:( Looks like you got a poor clocker if you can't even do 1050 on stock volts =/

Time to crack open ASUS Tweak and slap some voltage through that beasty as see where you can take it.
 
I'm thinking of going for one of the VTX 7850 as thats the one that 555BUK had the really good clocks with (1200 on the core is not to be sniffed at), but do any of the other brands clock just as well? if not then I'll spring for a VTX versh. I reckon it'd be helpful if people who bought these cards would say which manufacturer they bought and what clocks they get.
I also noticed its gone up in price ;).
 
I've found something very interesting

My standard OC is as follows:

Core 1150
memory 5800
1.215v

My min fps in the heaven benchmark was 14fps, however.....by increasing the core to 1160 gave a min fps of 26fps. That's a 12fps increase for only an extra 10 on the core.

The avg and max didn't change however. Thought it was quite interesting how a small OC of 10 on the core increasing the min fps so much
 
pieman109 said:
I'm thinking of going for one of the VTX 7850 as thats the one that 555BUK had the really good clocks with (1200 on the core is not to be sniffed at), but do any of the other brands clock just as well? if not then I'll spring for a VTX versh. I reckon it'd be helpful if people who bought these cards would say which manufacturer they bought and what clocks they get.
I also noticed its gone up in price ;).
Click to expand...

I have the MSI and it's sat at 1290/5800 no fuss.
 
glen8 said:
I've found something very interesting

My standard OC is as follows:

Core 1150
memory 5800
1.215v

My min fps in the heaven benchmark was 14fps, however.....by increasing the core to 1160 gave a min fps of 26fps. That's a 12fps increase for only an extra 10 on the core.

The avg and max didn't change however. Thought it was quite interesting how a small OC of 10 on the core increasing the min fps so much
Click to expand...

Ignore min fps in Heaven, it's highly inacurate, all it takes is for your hdd to have to read a file and it'll drop your min fps by miles. Run the test again and you'll find your min fps suddenly shoots back up.

Best thing to do with heaven is let it run through a loop in demo mode, then set off the test, it'll have all the textures etc cached then and you shouldn't get any min-fps blips.
 
pieman109 said:
I'm thinking of going for one of the VTX 7850 as thats the one that 555BUK had the really good clocks with (1200 on the core is not to be sniffed at), but do any of the other brands clock just as well? if not then I'll spring for a VTX versh. I reckon it'd be helpful if people who bought these cards would say which manufacturer they bought and what clocks they get.
I also noticed its gone up in price ;).
Click to expand...

Glad I got in when I did. Although my plan has always been to get a second one when I see a decent offer so looks like might have to go elsewhere when I decide to do it.

Obvious signs of the the power of demand, and what looks like a great value product.
 
glen8 said:
welshdragon has a VTX but think he may be struggling with high clocks. Could be something else as he's doing a fresh windows install.

I want an MSI :(
Click to expand...

The VTX is now retailing for £194:99 and thats only a few days after Gibbo was offering them for £179:99. Seems they might be a victim of their own success.
 
glen8 said:
ouch, and I thought I had a bad clocker

If you put the memory to full in CCC then that's why it crashed. High memory needs extra volts. If you just put the core 1050 though then you got a stinker
Click to expand...

Well, I am part way through a reinstall so shall have another go. Soemthing was definately up as Starcraft tried to bin all settings to medium.
 
Well, I couldn't resist any longer :D, just pulled the trigger on a VTX 7850 2gb.
Just need to flog the 6950 now.
Wifes gonna moan like hell now.
 
For people having instability issues, try leaving the VRAM at stock levels and just overclock the GPU. Once you find the max GPU clock on stock voltages, start upping the volts by 0.025v increments and up the clocks again. This will help you identify the best balance between clock speed, heat, and noise.

Once you have obtained your max/ideal GPU speed, start upping the memory.

My card clocked as follows.
*Max stable core was 1275MHx with memory at 5800MHz.
*Max stable memory was 6000MHz with core at 1150MHz
*Max for benching was 1325MHz / 6000MHz but this is VERY FAR from stable and needed 100% fan.
*At stock core 860MHz, memory was stable at 6200MHz.
*24/7 clocks were set at = 1200MHz / 5800MHz.

Max stable core and max stable memory would not co-exist on my card. I had to drop one to keep the other. Also, over-volt protection would cut in if I set clocks and voltage too high. This dramatically reduced fps.

Core clocks provide greater gains than memory clocks (atleash within Heaven, 3DMark11 & BF3).

1150MHz / 5600 MHz @ 1.150v should be safe for most cards.
 
555BUK said:
For people having instability issues, try leaving the VRAM at stock levels and just overclock the GPU. Once you find the max GPU clock on stock voltages, start upping the volts by 0.025v increments and up the clocks again. This will help you identify the best balance between clock speed, heat, and noise.

Once you have obtained your max/ideal GPU speed, start upping the memory.

My card clocked as follows.
*Max stable core was 1275MHx with memory at 5800MHz.
*Max stable memory was 6000MHz with core at 1150MHz
*Max for benching was 1325MHz / 6000MHz but this is VERY FAR from stable and needed 100% fan.
*At stock core 860MHz, memory was stable at 6200MHz.
*24/7 clocks were set at = 1200MHz / 5800MHz.

Max stable core and max stable memory would not co-exist on my card. I had to drop one to keep the other. Also, over-volt protection would cut in if I set clocks and voltage too high. This dramatically reduced fps.

Core clocks provide greater gains than memory clocks (atleash within Heaven, 3DMark11 & BF3).

1150MHz / 5600 MHz @ 1.150v should be safe for most cards.
Click to expand...

Show Off!!!

I assume all the above * points were with max volts
 
will be looking to get a new card when i get back off holiday, i play at 1080p. How do one of these cards at 1200mhz compare to a 580 at say 900mhz? Can get a good quiet non reference 580 for about 200 quid second hand and its very tempting.
 
psychodil said:
will be looking to get a new card when i get back off holiday, i play at 1080p. How do one of these cards at 1200mhz compare to a 580 at say 900mhz? Can get a good quiet non reference 580 for about 200 quid second hand and its very tempting.
Click to expand...

get the 580

There's no guarantee you'll hit 1200 on a 7850. Mine can't :( although it will do 1150 no problems :cool:
 
glen8 said:
get the 580

There's no guarantee you'll hit 1200 on a 7850. Mine can't :( although it will do 1150 no problems :cool:
Click to expand...

Thanks for reply. You think a 580 would be faster? I would probably get a non reference card like a twin frozr or dcII so it would stay quiet when overclocking to the max, if this makes any difference to the decision
.
 
psychodil said:
will be looking to get a new card when i get back off holiday, i play at 1080p. How do one of these cards at 1200mhz compare to a 580 at say 900mhz? Can get a good quiet non reference 580 for about 200 quid second hand and its very tempting.
Click to expand...

For 200 quid I'd get the 580, however, thinking long term if you wanted to go sli, it might cost a little more to get another 580, I'd imagine atleast.

But 200quid for a 580 is decent.
 
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