I have the Mac Pro 2006 1,1 model. I currently have a flashed 8800GT (512MB) in the machine. I have in my possession a Radeon 4870 (1GB) that I could flash and put in the machine. I've read through all of the threads on this board about the two cards and can't seem to find a straight answer, so please bear with me: How much of a real-world performance increase would I see from the 4870? Is it really worth the hassle of flashing or will the gains be negligible compared to my 8800GT? This machine is mainly used for photo editing (Lightroom, PS), very light video editing, surfing/music/movies, stuff like that. I don't use it for gaming. I have a PC gaming rig that I could drop the 4870 into, so unless it's worth it I'd rather not flash the card just for the hell of it. Any thoughts from people in the know?