Newbie here. Specs:Model Name: Mac Pro Model Identifier: MacPro1,1 Processor Name: Dual-Core Intel Xeon Processor Speed: 2.66 GHz Number Of Processors: 2 Total Number Of Cores: 4 L2 Cache (per processor): 4 MB Memory: 10 GB Bus Speed: 1.33 GHz Boot ROM Version: MP11.005C.B08 Chipset Model: NVIDIA GeForce 7300 GT Type: GPU Bus: PCIe Slot: Slot-1 PCIe Lane Width: x16 VRAM (Total): 256 MB Vendor: NVIDIA (0x10de) Device ID: 0x0393 Revision ID: 0x00a1 ROM Revision: 3008 Displays: Cinema HD: Resolution: 2560 x 1600 Pixel Depth: 32-Bit Color (ARGB8888) Main Display: Yes Mirror: Off Online: Yes Rotation: Supported Snow Leopard Primarily for number crunching Have upgraded my Ram. Would like to upgrade my video/graphics card (assuming video and graphics card are the same thing),cpu, and hard drive. Video/graphics card probably from the apple store ATI Radeon HD 4870 (anywhere else cheaper?). Have no idea about cpu or harddrive upgrades. Also, how simple is it to change graphics card? Checked it out on you tube-seems pretty simple except for the cable connection apparently. I am assuming I will have to go to the apple store for cpu installation ( cost?). Any suggestions would be greatly appreciated.