PCI-e video card and PSU compatibility

I am building a system for a friend. Not a high power one but
one for web surfing and multimedia use.

Components:

ASUS M2N-E AM2 NVIDIA nForce 570 Ultra MCP ATX
AMD Athlon 64 X2 5000+ Brisbane 2.6GHz Socket AM2 65W Dual-Core
--ASUS EN8500GT SILENT MAGIC/HTP/512M GeForce 8500 GT 512MB 128-bit
GDDR2 PCI Express x16

G.SKILL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800

Plus 3 hard drives (7200rpm) and a DVD-RW drive


I have a spare Antec True Power 430w I was going to use for this
system. The PSU is 20 pin while the motherboard is 24 pin. I know it
is quite possible in general to run a PSU 20pin with a 24pin MB, but I
have been uncertain, with the video card noted above, if this
arrangement would work okay. I have read that one should only be
conerned if running SLI or Crossfire for 20pin PSU and 24pin MB
combinations.

Thank you for any advice!

Sleepyguy wrote:
>
> I am building a system for a friend. Not a high power one but
> one for web surfing and multimedia use.
>
> Components:
>
> ASUS M2N-E AM2 NVIDIA nForce 570 Ultra MCP ATX
> AMD Athlon 64 X2 5000+ Brisbane 2.6GHz Socket AM2 65W Dual-Core
> --ASUS EN8500GT SILENT MAGIC/HTP/512M GeForce 8500 GT 512MB 128-bit
> GDDR2 PCI Express x16
>
> G.SKILL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800
>
> Plus 3 hard drives (7200rpm) and a DVD-RW drive
>
>
> I have a spare Antec True Power 430w I was going to use for this
> system. The PSU is 20 pin while the motherboard is 24 pin. I know it
> is quite possible in general to run a PSU 20pin with a 24pin MB, but I
> have been uncertain, with the video card noted above, if this
> arrangement would work okay. I have read that one should only be
> conerned if running SLI or Crossfire for 20pin PSU and 24pin MB
> combinations.
>
> Thank you for any advice!

According to this, the 8500 GT is 40W. There is no PCI Express 2x3 Aux
power connector on the card, so that means roughly 12V @ 3.5A flows
through the PCI Express slot connector. Add the 0.5A for three small
cooling fans, and the total is 12V @ 4A going through the single 12V
wire on the 20 pin main power connector. Up to 6A is allowed.

http://www.gpureview.com/show_cards....rd1=514&card2=

From an old post, these are the numbers for the Truepower 430W. (You
can verify against the label on the side of the supply, to be sure.)

VOLTAGE + 5V +12V +3.3V -5V -12V +5VSB

TRUE430 36A 20A 28A 0.5A 1.0A 2.0A

Working out the 12V loading on the single rail

1) Processor 12V @ 6.0A
2) Video 12V @ 3.5A
3) Fans 12V @ 0.5A
4) HDD 12V @ 3*0.6A
5) ODD 12V @ 1.5A+
Total 12V @ 13.3A

Even if I'm off an amp or two, the 20A rating has it covered.
Should be OK on power as well. (12 * 13.3) + 50W + 3*5W + 1*7.5W + 10W = 242W

Paul