SiliconAddict said:The problem you guys are missing is that unlike Windows the GPU plays a very central roll in the overall performance of OS X. It goes WELL beyond just gaming.
More and more of OS X's graphics subsystem has been moved onto the GPU over the years. Putting in a half ***** GPU into a system is going to hurt performance. Even more so with 10.5 when Apple finally turns on Quartz 2D Extreme.
PS- Graphics taken from http://arstechnica.com/reviews/os/macosx-10.4.ars/13 (Hosted on my FTP site as not to steal bandwidth. I highly recommend the read.)
PPS- You will also see where VRAM comes into play. This is why I opted for the 256 system. If they had a 512 I would have snatched that up instead.
Firstly, Isn't Quartz Extreme already enabled in Tiger.
And secondly, I think you went a little overboard when you opted for a 256mb ram gfx, displaying a desktop is hardly a difficult thing for most gfx, the effects in use doesn't really compare to those of a fully 3d rendered computer game. A little alpha blending isn't enough to make any Geforce 2 + card break a sweat.