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HD5870 overclocking results...

Soldato
Joined
19 Oct 2002
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5,593
Location
Reading UK
Ok guys, what have you pushed them to and at what voltage.

Also what did you use to test stability, especially with this new no artifact memory thingy..
 
Soldato
Joined
6 Oct 2007
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North West
Asus bios, tried 1000 GPU 1250 MEM 12v, seen 1-2 FPS increase in RE5/SF4, said screw it this is not worth it, flashed back to original bios for warranty purposes.
 
Associate
Joined
13 Dec 2007
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1,708
Location
Essex
I was getting artifact after flashing my XFX 5870 with the ASUS's bios, reflashed the card and everything is fine now.
 
Soldato
OP
Joined
19 Oct 2002
Posts
5,593
Location
Reading UK
Lucky I have the Asus 5870 then init ;)

Well not done a proper stabilty test, but 1000Mhz GPU at 1.28v and the memory at 1300Mhz, if I put the memory at 1350 ish the fps drops in GPU Tool.

So still loads of testing yet ;)
 
Soldato
OP
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19 Oct 2002
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Bit more benching using Crysis benchmark tool.

GPU is stable at 1000Mhz at 1.237v any lower it crashes.

Memory, I'm just setting at 1250Mhz as thats what the IC's are speced at.
 
Associate
Joined
23 Sep 2009
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441
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Milton Keynes
Has anyone tried playing GTA IV with an OC'ed 5870?

Whatever I OC mine to it crashes during GTA. Even with just a 30MHZ OC. It may crash straight away or it may take 10 mins but its guaranteed to crash with any OC on the card...

Anyone else get this?
 
Soldato
OP
Joined
19 Oct 2002
Posts
5,593
Location
Reading UK
Has anyone tried playing GTA IV with an OC'ed 5870?

Whatever I OC mine to it crashes during GTA. Even with just a 30MHZ OC. It may crash straight away or it may take 10 mins but its guaranteed to crash with any OC on the card...

Anyone else get this?

Have you tried a voltage bump?
 
Soldato
Joined
16 Jul 2007
Posts
7,691
Location
Stoke on Trent
Whatever I OC mine to it crashes during GTA. Even with just a 30MHZ OC. It may crash straight away or it may take 10 mins but its guaranteed to crash with any OC on the card...

Anyone else get this?

Not got a 5870 but my 4850 did this. Any slight increase of core or memory made it unstable. 3Dmark06 would run but would stutter. A huge stutter every few seconds and the result would be about the same.
 
Soldato
Joined
17 Aug 2009
Posts
9,464
Card fails for an overclocking forum.

On the plus side, less people nuking their gfx cards if it has anti-overclocking features.
 
Associate
Joined
14 Jul 2005
Posts
568
Not gonna bother flashing mine as the FPS increase doesn't seem to be worth it. Left mine at 900Mhz GPU 1250Mhz memory (the actual rating of the memory chips).
 
Caporegime
Joined
20 Jan 2005
Posts
43,267
Location
Co Durham
Eh? So you went from 850 to 1000 on the core and got 1-2 fps?! Why such a small increase?

Yeah me too. I saw a massive increase going from 850 to a 1000 on my 5850. It scales pretty linear eg 17% increase in clock = 17% increase in framerate. Unless you are cpu limited?
 
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