I have a new HP p6653, (AMD II X2 250 3.0GHz, 5Gb RAM, 64-bit) and I would like to upgrade the stock 220w PSU to something that can comfortably run a Geforce GT 240 (requires 300w PSU with minimum 18A on the +12V rail). Right now I am looking at the Zalman ZM360B-APS ATX V2.03 ATX12V V2.2 Power Supply based on testing done by HardwareSecrets, and price. Would this work for my card? Please feel free to suggest others