Overclocking non-reference XFX 5850

[krooton]

Can I even do it?

It's this version:

http://www.vgadownload.com/wp-content/uploads/2010/07/XFX-HD-585X-ZNFV-Radeon-HD-5850.jpg

I've heard horror stories of people bricking their cards by flashing reference BIOSes on to them, so would rather avoid that, but that means my voltage is stuck at stock.

Played around with Afterburner last night, and whilst I could Furmark 850/1100, Heaven would crash using anything more than 800/1050.

I'm I stuck at this level then?

 

[krooton]

I can't get Afterburner to edit voltages. Slider is not active, and even when I check the boxes in the settings and restart the software, it is still stuck.

 

[krooton]

Have you tried the enable unofficial overclocking configuration "hack"? Not sure if non reference 5850s are able to do it though

I've done that, which increased the range of the sliders for core and memory, but without the voltage to back it up, the best I can manage is in the OP.

I'll look in to the BIOS edit, and give auto-tune a go first.

Thanks!

 

[krooton]

My 5850 does 850/1150 on stock volts but to be honest I don't feel the need to run it at that so most of the time it is at stock

I've downgraded from Xfire 5770s, so want to squeeze as much performance out of this as possible