System Wattage PSU Compatibility

Robhao

Honorable
Jul 31, 2013
39
0
10,540
Hi everyone, hope you had a great Christmas.

So I'm upgrading my PC and I plan to use my old PSU which is an Cooler Master GX 450 W
My build will be:
i5-4760k
MSI z87-g43
AMD R9 270x
3 120mm fans with LED
1 HDD
2x Ram sticks

Now my question is, will that PSU (Cooler Master GX 450 W) be enough to power up this system for now? I don't intend to overclock until I get a new PSU.