Corsair CX430 or Corsair VS450

Solution
I don't recommend you buying any of those.The CX and VS series are VERY LOW quality PSU's (Tier 4).
Here are some options :

SeaSonic S12II 520W:
http://www.superbiiz.com/detail.php?name=PSS12II520&c=CJ

EVGA 500 B for lower budget :
http://www.newegg.com/Product/Product.aspx?Item=N82E16817438012&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-PCPartPicker,%20LLC-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=
I don't recommend you buying any of those.The CX and VS series are VERY LOW quality PSU's (Tier 4).
Here are some options :

SeaSonic S12II 520W:
http://www.superbiiz.com/detail.php?name=PSS12II520&c=CJ

EVGA 500 B for lower budget :
http://www.newegg.com/Product/Product.aspx?Item=N82E16817438012&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-PCPartPicker,%20LLC-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=
 
Solution
While Corsair sells some veru good PSUs, the CX and VS series are not among them. Relying on brand name, model name and even tier lists is unreliable as all units within a model line are oft lumped together and often, underservedly so.

Both those PSUs are "budget" models not well suited for the strains of gaming or overclocking. If an office box, used for simple word processing and web browsing, the CX430 will serve you just fine, but the capacitores are such that I wouldn't subject them to the aforementioned gaming / overclocking loadings. The Seasonic S12 / M12 series is affordable and sometimes the 620 watter is cheaper than the 520 watt model.

The EVGA B2 750 was $44 last week bit is now up to $60 @ ncixusa.com

The B1 series is a bit cheaper but is not up tot he quality of the B2 series and I would be hesitant to use with overclocking or gaming. OTPH, some
have a 10 year warranty, so if ya don't mind the potential RMA, you are guaranteed to be supplied with a working OPSU for 10 years. Other options

Antec HCG 520 ($55) http://www.newegg.com/Product/Product.aspx?Item=N82E16817371058
Seasonic S12 ($58) http://www.superbiiz.com/detail.php?name=PSS12II520&c=CJ
 


Should not be a factor in your decision.... in other words, meaningless in the context of this discussion.




http://www.tomshardware.com/answers/id-2311121/power-supply-requirements-nvidia-gpus.html#14243229

http://www.guru3d.com/articles_pages/msi_geforce_gtx_960_gaming_oc_review,7.html

Here is Guru3D's power supply recommendation:

GeForce GTX 960 - On your average system the card requires you to have a 400 ~ 450 Watt power supply unit.

If you are going to overclock your GPU or processor, then we do recommend you purchase something with some more stamina.

http://www.flipkart.com/seasonic-s12ii-520-watts-psu/p/itmd5xz5hzvzt9cx?pid=PSUD5XZ4KFH65H9E&ref=L%3A5769247082008825464&srno=p_4&query=PSU&otracker=from-search