Why do you even post here? what is the point in making such a *** recommendation you know is overkill? you must have been born in 93....troll...
Your current psu will work just fine don't listen to this child....
Also...the soon to be released 4770 will replace the 4670 and it should work with your psu just fine as its geared to be a low power card just as the 4670 and it should be quite the increase in performance for just a little bit extra cash...also the 4770 being 40nm should overclock quite a bit and with the added overclock it will pull even farther away from the 4770
I could get a 4670 for 50$ on my door step but im waiting to see if the 4770 will be worth the extra 40-50$
If someone is in the market for a 4670 i highly doubt they have that much of a budget and a 600 w psu would be 50-60$ or more for a cheapo brand and would push anyone looking at a 4670 down to a lower tier...but that really doesn't matter cause his psu will do just fine
The 4770 will perform at around the 4830/4850 range which is much better than the 4670. The 4770 will require a 6 pin connection though. It will consume 80 Watts which is 5 more than the PCIE slot can deliver. The slot wont supply all the 75 though it will be split somewhat more evenly between the slot and the 6 pin.
Even so i would have thought your PSU should be ok. Does it have a PCIE 6 pin cable ? If so its definatly ok. If not then you need 2 spare 4 pin Molex connecters to plug an adapter into. This may or may not come in the box so you need to check as getting a card turn up you cant use is a real pain in the butt