500w is not enough, think about 700w or greater.

Friend of mine runs almost the same layout (same CPU and GFX card, two more HDDs) on an Enermax 385 W no problems whatsoever (stress tested that thing myself).

Most important thing is efficiency, not the absolute input.

See http://www.enermax.outervision.com/ for further advice on the topic.

I tend to agree with both of your points BigBrit...

The Antec true power 550 will deliver 550 watts continuous (100% duty rating) and is the same PS I use in this machine a p4 2.8 HT w/ a 6800GT this machine pulls about 300W and it is a good match... Why strain your PS by running it at 100% duty . Give yourself some elbow room . Besides what if you upgrade again?

This is not a noob freindly site... OT questions and help with basics is greatly frowned upon...
This forum is for hardware questions as they relate to drivers. (now you know)

demerit awarded !

This is a discussion group for DriverPacks and not a help group for building new PC's.

We will give you latitude this time.

Welcome to DriverPacks.

I am planning on building a new pc solely for gaming and maybe some movie watching. here are the specs:

CPU - core i5 750
Mobo - Asus P7P55D
RAM - Corsair XMS3 (d3-1600)
GPU - Power colour HD 5870
Harddisk - Seagate 1T
PSU - Antec 550W true power

What do you guys think? Budget not a big problem.

Thanks,
Trevor.