I just repurposed one of my friend's old computers as one of my mining computers, moving my 7970 and 5870 to it. On my old comp, I got about 1000 Mhash/sec, but this new one I only seem to be getting 400?
Here's exactly what I did. If I didn't mention it, I didn't do it:
1) Reformatted and installed Windows 7
2) Downloaded chrome
3) Installed latest ATI 12.6 Catalyst Driers
4) Installed Guiminer
5) Installed Diablominer
6) Installed Java
7) Installed MSI Afterburner and set clocks to 1050 on the 7970 and 900 on the 5870
Started diablominer - it says I'm doing 1000 mhash/sec, but on btcguild where i Have it pointed, it says that I'm only at 450 mhash/sec
...wtf is going on? Did I miss a step? Why am I not hashing with the same rate as I did on the old comp? And why is diablominer saying that I'mhashing at 1000 mhash/sec if I'm not.
Btw, same problem persists when I use guiminer instead. Only difference is that it says I'm doing 900 when I'm actually doing 450.
Is there something else I need to install in order to make these things work? I didn't install any chipset drivers or anything, but windows seemed to have picked it up correctly.