Please answer specifically

[username changed]

Should I use 2xsata/molex to 6 pin to power my gtx 650 which requires only 65w....or should I just use 1xsata/molex to 6 pin???TOTAL OUTPUT POWER: 300-WATT TOTAL CONTINUOUS OP. 

OUTPUT CONNECTORS: Main 24 Pin, P4 4-Pin, (2) Molex 4-Pin, (1) FDD 4-Pin.. 

Edited May 30, 2020 by c low nIGGA
Spelling mistake and some additional info

[Guest]

You definitely shouldn't power a graphics card using a Molex to 6 pin connector, especially not with a 300 Watt PSU of questionable quality. 

[mariushm]

Avoid SATA connectors unless you have no choice.

Molex connectors are of better quality and can handle more current (though not important in this context).  Basically, there's better mating, more friction between the metal contacts inside connectors, more surface, so they're more reliable.

 

The video card will probably take some power from the pci-e slot, probably 30-45w , and will take the rest from the extra connector.... or, it will take up to 75w from extra connector

 

With a molex, a single molex connector will be enough, but two is better and safer. With SATA connectors you definitely want to use 2 sata connectors.