PSU selection

[Shooter]

I need to choose a power supply for a new system.It will have to support a
N4 SLI motherboard with two 6800GT's,an Athlon 64 4000+ cpu,one
harddrive,and two optical drives in a seven fan Thermaltake case.My present
choices are the Antec Truepower 550,THERMALTAKE 560,or two Enermax models
with built in SLI support,one at 535 W,the other at 600 W.The first three
run about the same price,about $100.The 600W is $160.I don't want to overpay
for power that I don't really need,and the reviews I've seen of the 600
weren't that good,saying that the unit didn't deliver at higher demands.And
I don't know how much difference being SLI ready makes,I assume all that is
needed on other models is dual PCE adapters.

 

[philo]

I need to choose a power supply for a new system.It will have to support a
N4 SLI motherboard with two 6800GT's,an Athlon 64 4000+ cpu,one
harddrive,and two optical drives in a seven fan Thermaltake case.My present
choices are the Antec Truepower 550,THERMALTAKE 560,or two Enermax models
with built in SLI support,one at 535 W,the other at 600 W.The first three
run about the same price,about $100.The 600W is $160.I don't want to overpay
for power that I don't really need,and the reviews I've seen of the 600
weren't that good,saying that the unit didn't deliver at higher demands.And
I don't know how much difference being SLI ready makes,I assume all that is
needed on other models is dual PCE adapters.

put it this way:
you don't need a 600 watts supply for that HW