Jathanis, my 210's crunch at POEM ok, so if you have nVidia cards I don't see why they shouldn't work. My ATI 4350 certainly doesn't though. (I didn't expect it to since it only had BETA support) Which ATI card are you running?
My ATI is a 4850, and although it's supposed to be a double precision card, it isn't always supported by individual projects. The nvidia cards are a 9800gtx and a 9600gso, and both gave me errors last time I tried Poem, although I don't know if that was a driver issue or a project issue. Neither work on GPUgrid, but both are great on Primegrid, so I put them there aiming for 10M... I figured I'd look at other nvidia projects after that goal, assuming I haven't found the money to upgrade them by then...