Would that rosewill really be close? I've only got a DVD drive, 7200 RPM HD and an HD4870 in there and that supply has 2 +12V rails at 18 A each. Would going to 600W help?
Newegg.com - Rosewill RP600V2-S-SL-S 600W ATX12V v2.01 SLI Certified CrossFire Ready Power Supply - Power Supplies
Also, recommendations on any other parts (particularly motherboards) are appreciated
A basic single gfx card gaming rig doesn't need a 600 watt PSU!
I will be ordering the same parts you listed with the Rosewill PSU I posted. It has enough power for the rig I'M building and it has 241 excellent reviews on newegg.
Here is a PSU calculator, everyone should bookmark it! eXtreme Power Supply Calculator Lite v2.5
The rig I'm building only needs 446 watts and that's at %100 power usage with %30 capacitor aging. Make sure you calculate for hardware you might want to add in the future.
Here is a PSU calculator, everyone should bookmark it! eXtreme Power Supply Calculator Lite v2.5
LOL!!
It even states on that calculator website that: 'The recommended total Power Supply Wattage gives you a general idea on what to look for BUT it is NOT a crucial factor in power supply selection! Total Amperage Available on the +12V Rail(s) is the most important, followed by the +5V amperage and then the +3.3V amperage. ' And your relying on newegg reviews.
You have to realise that this is true, and that you have to be aware of where all the watts from a PSU are going. If most of the watts are going to the 5v and 3.3v then you will be stuffed when trying to add a big graphics card that runs of the 12v rails.
While i agree that you dont need a 600w psu for a single card in the most part, it depends alot more on the brand of psu (ie. a cheapo brand may supply alot less to the 12v rails than a good brand psu of the same wattage.)
Just be aware, there is alot more to it than simply how many watts a psu is rated at.