Verify sufficient PSU/Confirm final upgrade parts

[transcend11]

I am upgrading my current computer with the following parts:

DFI LANPARTY UT nF4 Ultra-D
BFG Geforce 7900GT 256MB
AMD Athlon 64 3200+ Venice

I currently have a Thermaltake 420W PSU which has served my well for over a year on my current system. I want to be sure that I do not get my new equipment in and find out I do not have enough power.

I don't know much about power supplies, but is there a program that I can use to find out how much power I am using with my current hardware? Also, does moderate OCing of the processor and/or videocard require much extra wattage?

I am ordering all of these parts this week, so any final comments are appreciated on my choice of upgrades, my budget is ~$600. Thanks all!

 

[aliasaid]

get a better powersupply

 

[transcend11]

Brand or wattage?

 

[Nitestick]

supposedly DFI will not give you warranty coverage if you use less than a 480w psu, personally i think its a load of crap but i wouldn't go against it. i reccomend an Antec TruePower 2.0 or an OCZ Powerstream

 

[jeremy]

i assume you mean you got this one http://www.newegg.com/Product/Product.asp?Item=N82E16817153006
18A on the +12v is insufficient for the parts you mentioned , also its not atx 2.0 and you gotta have an atx 2.0/2.01 psu for that mobo, so you gotta get a new psu , i recommend these
antec truepower 2 430w
http://www.newegg.com/Product/Product.asp?Item=N82E16817103928
antec truepower 2 480w
http://www.newegg.com/Product/Product.asp?Item=N82E16817103929

better not get a cheapo psu , read here why
http://www.techist.com/showthread.php?s=&threadid=96974

 

[Spartan]

go with the antec truepower II 550W PSU and if really have the money, get an OCZ powerstream 520W