A Celeron is slower because it has almost no L2 cache (sort of an on-chip RAM buffer that is loads faster than your usual RAM.) Since Poser and such are very CPU-intensive, Celerons are going to bog down under the weight of, say, Poser 5 (Poser 4 doesn't do so hot either.) Running Poser 5 on a Celeron is sort of like asking a Suzuki Samauri driver to run a level 5 off-road trail at Moab, Utah... the result gets real ugly, real fast. IOW, you simply don't send an econoboxed "ess-ewe-vee" to go do a Jeep's job, just like you don't want to demand that a Celeron behave like a Pentium 3 or 4 processor ;) You're better off getting the full deal, and if it's money you're looking to save, getting an AMD Athlon processor (err, not Duron, Athlon - for pretty much the same reasons you don't want a Celeron.) HTH, /P