I've spent the past few days picking out parts for my first build, and being quite inexperienced I thought I would ask for advice/comments/suggestions about my current build. My budget is around $1000. This computer will be virtually for gaming only. Case: Antec Nine Hundred Black Steel ATX Mid Tower Computer Case Mobo: MSI 790XT-G45 AM3/AM2+/AM2 AMD 790X ATX AMD Motherboard CPU: AMD Phenom II X2 555 Black Edition Callisto 3.2GHz 2 x 512KB L2 Cache 6MB L3 Cache Socket AM3 80W Dual-Core Desktop Processor PSU: Antec NeoPower 650 650W ATX12V / EPS12V SLI Ready CrossFire Ready Modular Active PFC Power Supply RAM: G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Video Card: SAPPHIRE Vapor-X 100283VX-2L Radeon HD 5770 (Juniper XT) 1GB 128-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card w/ Eyefinity Hard Drive: SAMSUNG Spinpoint F3 HD502HJ 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Disc Drive: ASUS Black yadda yadda DVD Burner Monitor: SAMSUNG EX2220X Glossy Black 21.5" 5ms LED Backlight LCD Monitor I have a mouse, keyboard, and speakers, am fine with the onboard mobo sound and have access to discounted windows 7 at my school. A few questions: 1. Will I need additional fans or are the four fans provided with the case (and the ones that come with the cpu, gpu, etc) sufficient? 2. Are the parts all compatible? I spent a while trying to make sure they are but I'm not 100% confident I understand it all. 3. Are the parts well-balanced performance-wise? 4. Is my mid-tower big enough to hold it all? 5. Are there any other things (e.g. thermal grease?) I'll need during construction that I may not know about? Thanks in advance for any input!