Lol. I think his comments are smartass. It IS a little humorous as there is no mention of overclockability support by the manufacturer on all 3D Accelerators. The manufacturer rates the thing at a certain speed. Anything beyond that is unsupported and if you tell the store that that's the reason you are taking it back, they will find it humorous(of course the quality of the chipsets vary in the production process, chances are you'll get a better one if you take it back). Of course not being able to overclock your new toy IS a problem, I am having problems myself even overclocking my GeFORCE 1 DDR with Max Payne and 3DMark2001(same engine, but max payne seems to crash alot more than 3dmark 2k1 at stock frequencies). It really sucks. Half-Way through the low detail car chase....--Another post. Maybe someone knows something i can do.
Good luck!