I have a serious performance problem with my mining setup that I'm hoping someone here can help with.
First of all, it isn't a dedicated miner - it's my desktop PC, running Windows 7 64-bit. I have a pair of HD 6670's in it, one is driving two monitors, the other is dedicated to mining. Before I screwed it up today, I was getting decent performance - about 110-115 Mhash/sec from both cards (the card driving the monitors was set at dynamic, the other card at 9). I was running Catalyst driver version 12.4 and after doing some reading here decided to downgrade to 11.6, the recommended version for mining.
So I uninstalled 12.4, rebooted, installed 11.6, rebooted again, and suddenly my performance plummeted to about 30-40 Mhash/sec on the card driving the monitors and about 13-14 on the secondary card! I found out that I needed to disable ULPS, so I did but that didn't make any difference.
So then I decided to revert back to the driver version that I was running before that was getting decent performance (even though it isn't the recommended version). I went through the whole uninstall, reboot, reinstall, etc. -- making sure I removed every trace of Catalyst I could find (including all "ATI" and "AMD" keys in the registry) in between. I'm still getting shit mining performance. I'm at a loss on what to try next. Any ideas? I'll be happy to post my config and any more info you need.
On a side note, does anyone have the FirePro V4900, and does it work with cgminer? How's its performance? I'm probably getting a new PC in a few weeks, and that's what's on the specs sheet for it.
FirePro V4900 should work with any opencl miner, including cgminer. You can probably get 100-120 Mh/s out of it. Hint: 480 stream cores same as HD 6670
re: your problem with slower performance
Download afterburner:
http://event.msi.com/vga/afterburner/download.htmunlock it:
http://forums.overclockersclub.com/index.php?showtopic=182403See if you can set the core/memory clocks to where you want them to be.
If AB cannot reset the clocks, flash the BIOS with techpowerup images and try again.
Your clocks were probably locked when you down/upgraded.