the link does not tell you what the minimum watts and amps are for this card, but looking at other 670s, they say 500watts and 30amps on +12 rail. although my psu is 620w im not sure about the amps?
Corsair HX620 specs [Here] (Info at bottom of page)
Also are all these cards backward compatable? , as my mb only has PCI Express 1.0 (Gigabyte GA-P35-DS3R)
That PSU will be ample. I've run a much more power-hungry GTX480 on my 560W unit without any trouble at all.
With that said, it’s an older unit and looks about 80 plus, so maybe try a newer gold/platinum version if you're shopping for a new PSU? You'll get about 10-15% more efficiency and this will be quite noticeable in terms of less heat output.
But for an older unit, it’s very good.
And PCIe is backward and forward compatible, though some older motherboards may need a BIOS update to see newer cards.
I have a P35-DS3R v1.0 rev, and I've used HD4850, and GTX460 1GB cards in it, no problem. I have yet to try a PCI-E 3.0 card in it, but I have no reason to believe that it wouldn't work.
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Rig(s) not listed, because I change computers, like some people change their socks.
Corsair HX620 psu, enough to run GTX670?
