System Build

Okay. Please correct me if I am in the incorrect category. I am planning to start building my new computer. However, I am still scared about it...since it is my first build. I was going to get a Mac Mini, and dual boot in Windows 7 and Mac OS X, but it is >$200 for a Mac Mini than the PC that can really handle the 64-bit of Windows 7. I probably wouldn't need the dual boot anyways. And, besides, the PC I'd build would come with a Quad-Core processor, instead of a Dual-Core, like the Mac Mini. Here is my parts list. How is it? Am I missing anything? The case includes all of the necessary case fans. Thanks in advance for your help!

• Gigabyte MA785GM-US2H Motherboard
• AMD Phenom X4 9850 Quad Core Processor
• Corsair XMS2 4GB PC6400 DDR2 800MHz - 2x2048MB
• Cooler Master Centurion 5 - Blue ATX Mid-Tower Case with Front USB, Firewire and Audio Ports
• Cooler Master eXtreme Power Plus 500-Watt Power Supply
• LG GH22NS40 DVD Writer - DVD+R 22x, DVD+RW 8X, DVD-RW 6x, DVD-RAM 12x, SATA (OEM)
• Western Digital WD5001AALS Caviar Black Hard Drive - 500GB, 7200 rpm, 32MB, SATA-3G
• Windows 7 Professional - 64-Bit

Thanks for your response! Yay! The CPU and Mobo was a combo deal. Thanks for the advice on the board. I see what you're saying. I don't plan to expand it that much in the future. I am not a big gamer, so I assume I'll be okay. I do play Microsoft Flight Simulator occasionally. Will that work okay with the onboard graphics card?

Okay. I will. Thanks for your help! Wish me luck on this build!

I was peeking at the motherboard manual online and it says prior to installing the CPU, apply a thin layer of thermal grease. Is that really necessary?

Okay. And, is the 500-Watt PSU necessary for my specs? Can I go with a 460 W, or even lower?