Can't overclock Sapphire 7850?

[jruben4]

Added a new Sapphire 7850 - and can't seem to adjust any of the overclock settings.  I tried several of the overclock apps, even tried triXX, but it just shows "0" for clock speed and memory speed, and if I hit "+" it goes to 1 and then back to zero. (VGA SAPPHIRE|100355-1GOCL HD7850 1G)

What am I missing?

[Kluge]

Does your motherboard have an onboard graphics chip? Are you sure triXX is reading the 7850?

Can you modify it in the AMD "Vision Engine Control Center"? (Performance->Overdrive->"tl;dr - 'I ACCEPT'"->enable "Graphics Overdrive"->"Configure Graphics Overdrive")

[moodminer]

If you just need to overclock the card for mining BTC then you can set the gpu-engine and gpu-memclock from within your config file using cgminer.  If you want an example of a working 330MHash/s config file for the 7850 there is one at http://www.brandonorndorff.com/bitcoin/mining/radeon-hd7850-7870-cgminer-config-settings-bitcoin/ .  It was a post for 300MHash but has since starting changed a few times and is running stable at 330.

Using cgminer you can configure and overclock without actually using third party software only when mining.

[jruben4]

I don't have the overdrive option under the ATI control panel.  I've uninstalled the ATI drivers, rebooted, reinistalled new drivers, rebooted, etc.

http://farm9.staticflickr.com/8263/8707243773_04023329ff_d.jpg


Even with the current ATI drivers, no software seems to be getting the GPU clock, mem clock, GPU temp information from the card:

http://farm9.staticflickr.com/8277/8707243625_1ac87b3635_d.jpg


I assume this is why TRIXX can't overclock the card (nor can CGMINER).

Any ideas?

[coveredbeetle11772]

 Don't push your card too hard or you might have heat issues. Unless you have good cooling.