Pci External Sound
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How much power dose my computer need?
I'm building my own computer but I don't know how big of a power supply I need? Here are the specs
Intel Core 2 Quad Q9550 2.83GHz
Western Digital WD1001FALS 1TB 7200 RPM SATA 3.0Gb
MSI P43 Neo3-F LGA 775 Intel P43 ATX Intel Motherboard
ZOTAC ZT-20103-10P GeForce GTS 250 1GB 256-bit GDDR3
CORSAIR 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800
Creative Sound Blaster X-Fi XtremeGamer 7.1 Channels PCI Interface Sound Card
D-Link DWA-552 32-bit PCI Xtreme Desktop Adapter
SAMSUNG USB 2.0 Slim External 8X DVD Drive USB-Powered Model SE-S084B
Acer H213H bmid Black 21.5" 5ms HDMI Full HD 1080P Widescreen 16:9 LCD Monitor
2 120mm Led fans
1 120mm Fan
I hope this helps.
The Corsair 400W PSU with 30 amps on its +12V rail will be plenty for your config.
The Core 2 Quad Q9550 is a 95-watt CPU, which is 8.5 amps on the +12V rail.
The GTS250 draws a maximum of 150 watts according to nVidia: http://www.nvidia.com/object/product_geforce_gts_250_us.html (it's under the specifications tab). 150 watts / 12 volts = 12.5 Amps.
Rest of your system pulls 5 amps.
Add it all up, your system pulls a maximum of 26 amps when everything is drawing max power at the same time (which rarely ever happens).
And you don't need a stupid-huge PSU since you are not running SLI (which you cannot do anyway on a P43 motherboard).
So the Corsair 400W will drive your system very nicely.
Hope this helps.
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