je rajoute un post en ma faveur
grave à http://www.extreme.outervision.com/PSUEngine
j'obtient (avec un cros' de 4870) :
System Type: 1 physical CPU
Motherboard: Regular - Desktop
CPU: Intel Core i5-750 2667 MHz Lynnfield
CPU Utilization (TDP): 90% TDP
RAM: 4 Sticks DDR3 SDRAM
Video Card: ATI Radeon HD 4870
Video Type: Crossfire
Regular SATA: 1 HDD
DVD-RW/DVD+RW Drive: 1 Drive
Fans
Regular: 2 Fans 120mm;
Keyboard and mouse: Yes
System Load: 90 %
Recommended Wattage: 434 Watts
donc selon eux 400 W suffirait ?