Need a new power supply for my VIA K266 mobo because I'm upgrading the graphics card to a HD 3850 AGP so it needs the power supply to be: >450w, 30Amps on 12v rail, 2 molex connectors (4 needed all up), dimensions 15x14x8.5cm, 20+4 pin motherboard connection, not sure what ATXv it is but probably ATXv 1.3. Please suggest some suitable power supplies.