Will my PSU run an 8800GTS 320?

I have a Coolmax CX-550B, and I was wondering if it would run these specs without a problem:

74gig Raptor drive
160gig WD IDE drive
Pentium D 2.8
1 dvd burner

I know Nvidia states you need at least 26A on a 12v rail, however, I have 18A on two twelve volt rails, do they combine and count? Thanks. If this does not work, can you reccomend a cheap one that would work?

Here is a link to the stats - http://www.coolmaxusa.com/productD [...] ory=single

Thank You! Another question...I also have this power supply X-ULT500P, which PSU would be better for my setup, this one or the one I mentioned above?? THANKS AGAIN!!


# 500-watts # Dual 80 mm fans
# Supports Intel Pentium 4 and AMD motherboards
# ATX ver 2.03 and ATX 12V ver 1.2 compliant
# Short-circuit Protection
# In-rush Current Protection
# Thermal Overload Protection

# Power Specifications:
# 115V, 230V switchable power supply
# +3.3V, 28A
# +5V, 30A
# +12V, 34A
# -12V, 0.8A
# -5V, 0.3A
# +5Vsb, 2.0A

The other company is "Ultra" you know, with the X-connect, can't pick up a computer magazine without one of their ads. Thank you though, I have read on other forums that since the 12V rails are split and run at 18A a piece its not good, they should run 26A a piece, not together, is this true?