PSU for new PC (amps vs wattage)

[fruscai]

i just read the PSU 101 guide, really informative stuff, i feel much more knowledgeable, but im still very doubtful

i'm getting a new computer when i visit the states this summer, ordering online from newegg, i'd just like to make sure that this power supply:

MASSCOOL PS-PSU460 ATX12V/ EPS12V 460W Power Supply

will run all this equipment

DFI LANPARTY UT nF4 Ultra-D Socket 939 NVIDIA nForce4 Ultra ATX AMD Motherboard

MSI RX1800XT-VT2D512E LITE Radeon X1800XT 512MB GDDR3 PCI Express x16 Video Card

AMD Opteron 165 Denmark 1000MHz HT Socket 939 Dual Core Processor Model OSA165CDBOX

G.SKILL Extreme Series 2GB (2 x 1GB) 184-Pin DDR SDRAM DDR 500 (PC 4000) Unbuffered Dual Channel Kit System Memory Model F1-4000USU2-2GBHZ

SAMSUNG Black 1.44MB 3.5" Internal Floppy Drive Windows 98SE/ ME/ 2000/ XP

Western Digital Caviar RE WD2500YD 250GB 7200 RPM SATA 3.0Gb/s Hard Drive

ASUS Black ATAPI/E-IDE DVD-ROM Drive Model DVD-E616A2 BK

NEC 16X DVD±R DVD Burner Black IDE/ATAPI Model ND-3550A

Creative Sound Blaster X-Fi XtremeMusic 7.1 Channels PCI Interface Sound Card

ZALMAN VF700LED - CU 80mm 2 Ball Blue LED Light VGA Cooling Fan with Heatsink

ZALMAN VF700LED - CU 80mm 2 Ball Blue LED Light VGA Cooling Fan with Heatsink

anyway, while the PSU is only 460 watts its got a combined 12V rail capacity of 36A, i just wanted to make sure that this was enough (does the higher amperage compensate for the lower wattage on a full system build)

 

[computermaineack]

460W and +12V@36A will be fine for your system. My old Dell (not the one below) had a 250W psu, probably about 14A on the 12 volt rail, and it powered 3 HDD's, and 2 opticals (along with 3 PCI cards, mobo, cpu, etc). Amps are almost always more important than wattage. The general minimum for a computer on the +12V is about 18A (single rail), so you're well within that range.