Try deleting the core and download a new one. Just saw this post from Pande's blog:The real beef I have with these units is that I had to drop the shaders on my 9600GSO by over 300MHz just to run the damn things.
They rolled out this new core early it seem to deal with issues people have been reporting here:GPU2 core auto-upgrade planned for Monday Jan 4, 2010
Happy New Year! We're starting out the new year with a planned auto-core upgrade for GPU core 11. This is planned to happen Monday morning Stanford time. This will bring the GPU core to version 1.31, which has many improvements. In particular, this core is very helpful with the new P10101 WUs. If you'd like to upgrade sooner, you can always do a manual core upgrade at any time by deleting your GPU core (or perhaps safer -- renaming the file so you can revert back if you want).
However, such manual core upgrades are just for FAH experts. The FAH client software will do all of this for you if you like, by the auto-upgrade mechanism built-in on Monday.
It's also worth mentioning that we have made good progress with the GPU3 core and that should be rolling out of beta to production early in 2010.
That would be nice, except for the fact that I've been running the 1.31 core for over a month (it's required in order to fold on G92 and GT200 GPUs in the same system). It's also been the core that gets downloaded with each new client installation for a while now.