Hi karingka, I'm using Macs but I have my big system on the PC i7 OC to 4.2GHz. ATI 5870 Eyefinity 5xHD vertical monitors, 12GB RAM, 256GB flash drive. My resolution (with bezel correction) is huge 11Mpix and I'm very happy with my frame rate... 30-60fps. If you're using extreme resolution and sceneries like Reno, Oahu - 1.5GB od VRAM is very limiting factor IMO. I can easily break the 2GB barrier on my system... GPU speed it's not a limiting factor for X-Plane with hiend cards (when I look at the clouds I can easily go up to 200fps). Also we need to wait for the 64bit version of the X-Plane... regards arti