HD5870 overclocking results...

Mr Paul · 8 Oct 2009 at 23:46

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..

RavenXXX2 · 8 Oct 2009 at 23:49

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.

antran · 8 Oct 2009 at 23:51

I was getting artifact after flashing my XFX 5870 with the ASUS's bios, reflashed the card and everything is fine now.

Mr Paul · 9 Oct 2009 at 00:02

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

Mr Paul · 11 Oct 2009 at 16:32

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.

Nuwidol · 11 Oct 2009 at 16:38

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?

hyperst · 11 Oct 2009 at 16:44

Im wondering who will post first, OMG i Borked/blew up my 5870

Mr Paul · 11 Oct 2009 at 17:18

Nuwidol said:
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?

Mr Paul · 11 Oct 2009 at 17:18

hyperst said:
Im wondering who will post first, OMG i Borked/blew up my 5870

Well the bright side of having the Asus model, is that they condone voltage boosting

Martini1991 · 11 Oct 2009 at 18:02

Not possible...

mame · 11 Oct 2009 at 18:08

Nuwidol said:
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.

Mr Paul · 11 Oct 2009 at 20:34

Martini1991 said:
Not possible...

straxusii · 11 Oct 2009 at 22:24

Mr Paul said:

He means you cant shag the card by too many volts as it has over volt protection.

hyperst · 11 Oct 2009 at 22:28

anythings possible lol

Hotwired · 11 Oct 2009 at 22:35

Card fails for an overclocking forum.

On the plus side, less people nuking their gfx cards if it has anti-overclocking features.

Th3D0n · 11 Oct 2009 at 22:35

mame said:
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.

my 4850 dose it as well

Nuwidol · 12 Oct 2009 at 04:21

Mr Paul said:
Have you tried a voltage bump?

Yes, but TBH I didn't push the voltage too much higher. No one else get this at all then? For me the whole screen goes a random squiggly bunch of colours & its a hard reset to get out of it..

Doppleganger · 12 Oct 2009 at 10:42

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).

wolvers · 12 Oct 2009 at 13:55

RavenXXX2 said:
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.

Eh? So you went from 850 to 1000 on the core and got 1-2 fps?! Why such a small increase?

Greebo · 12 Oct 2009 at 14:05

wolvers69 said:
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?