At a guess - and PSUs are a bit of a black art as far as I'm concerned - the answer is 'yes'. It looks like, with average gaming, the 660 draws up to about 140 watts. Given that the Antec PSU is a pretty good one, I'd say you should be OK.
More than enough. Nice case but it is big and more suited to water cooling.
I used to use big cases when building my rigs but my current one,just finished is in a much smaller case, why have I gone smaller well I always seem to be upgrading and so have to move the case frequently and I am not getting any younger so weight was an issue. This rig sits beside me and is silent as I can get it. I dropped the voltage on the fans so that they turn much slower but more silently and still shift plenty of air through the case.
My specs.//Lian Li V354A//MSI H77MA-G43//I5 2500K //Arctic Cooling Freezer 11 //8GB XMS3 Classic 1600 MHz//Asus Direct CU 11 GTX 670//128GB Crucial m4//2 x 1TB HDD//Corsair AX 650 PSU//Dell U2711//Dell U2410//2 x BitFenix Spectre PWM 120mm Blue LED Fan//1 x BitFenix Spectre PWM 140mm Blue LED Fan.
Nice system , 620 W should be more than enough . I run a 3770k overclocked , gtx680sc , 16 Gb vengeance ram ,5 fans ,and liquid cooling on a sabertooth MoBo with a 650 W PSU , never had any issues . Nice case , bit too many lights for my personal taste , but should look pretty cool when all up and running . good luck .
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