Hi I'm gonna have a MSI 870-G45 Motherboard AMD Athlon II X4 640 Processor OCZ Gold 4gb DDR3-1333Mhz RAM Seagate Barricude 500 gb SATA2 7200RPM Harddrive PowerColor HD 4830 512 mb Cooler Master Hyper TX3 Cooler Asus PCE-N13 Network Card Will my OCZ 500 Watt ModXStream Pro PSU be enough? How about a Antec Truepower New 650W Modular PSU Also, the 512 mb PowerColor HD 4830 should I get 1gb, or is 512 mb enough for 1280 x 1024 res or even 1600x900 res? I know about the PSU calculators but I think those are like the recommended or minimum constant wattage output, where as the 500W and 650W PSU's are max outputs. All help is appreciated. THANKS!