Well, I have a Gigabyte Radeon 7950 on a fresh W7 Ent 64bit install, 13.1 drivers, GUIMiner Scrypt. Seems normal, right? Well, here's the problem.

I can only mine on the 7950 Low Usage setting.

I can increase the intensity but IF I increase the thread concurrency, it will not connect. This occurs for both CGMiner and Reaper. But for reaper, increasing the intensity above 13 causes mostly stale shares.

I still get around 350 Khs, but I should be getting much more obviously. Anybody else ever experience this? I have no ideas what to do.

Essentially, if I do not mine on low usage, it will not connect which makes no sense.

Thank you in advance!