Upgrading my pc

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Dec 2, 2015
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So i want to upgrade my pc, currently got a gt 630 and an i3 2120. I want to buy a GTX 660 and a i5-3470 for around 100$. I found them on SH.
The thing is that i don't know what PSU will i need. I found a "Sirtec - High Power 500BR-A12S, 80+ Bronze, 500W"
Rail +12V 1
+3.3V 18 A
+5V 17 A
+12V 1 38 A
-12V 0.3 A
+5Vsb 2.5 A

20+4 Pin ATX 1
4 Pin ATX 12V 1
6+2 PCI-E 1
SATA 3
Molex 3
Floppy 1

Just so you know, i have a 500gb HDD and maybe i'll add another one that i have around here, also i got a DVD-RW.
Also i was thinking about a GTX 750 at same price, but from what i've read, the 660 is far stronger.
Will this PSU and configuration be good? I won't play last AAA Games. Just some CS GO, ATS, GTA V and maybe others, i really don't care if it can run them on high. Medium is also ok, even low.