is 300w PSU enough for rx 460?

I clicked on the ebay link and found this on the item page http://puu.sh/qTila/0f19d31a41.png

300W is not enough. 350W is the bare minimum, but you should always slightly supplement your system with power. I'd recommend a 450W-500W PSU. You can get a good 450W-500W PSU for around $40-$50.

Here are a few you may want to consider:
http://www.newegg.com/Product/Product.aspx?Item=9SIA0723W13888&cm_re=450W-_-17-182-329-_-Product (450 modular)
http://www.newegg.com/Product/Product.aspx?item=N82E16817139146 (450 modular)
http://www.newegg.com/Product/Product.aspx?Item=9SIA1UH4RE3051&cm_re=EVGA_500_W1-_-17-438-016-_-Product (500 non-modular)
 

Intel core 2 quad q6600
4gb of ram
gigabyte g31m-es2l motherboard
 

well....ill not do crazy overclocking so will it work?
 


Doesn't matter. Going with less than the minimum recommended wattage equals high risk of bricking your card or even your entire system. 350W is bare minimum required for full functionality under stock speeds/load, but because PSU components degrade in efficiency over time, having headroom helps not only with stability but also preservation. Don't skimp on the PSU, it can easily be the biggest mistake you'll make in PC ownership.
 

idk, but all i know is not one of those dell optiplex PC's
 

idk, but all i know is not one of those dell optiplex PC's
 


Download the free version of this program: https://www.piriform.com/speccy/download

Run it, screencap the "Summary" page, and provide us with that screencap. It should show your OS, CPU, Motherboard, GPU/Display, Storage, and Audio devices/drivers. This'll provide us with the info we need in order to tell you if you need to upgrade anything else before upgrading your GPU. A PC is like a table, if one leg isn't intact the whole thing fails.

EDIT: also, a picture or link to your case would be very helpful too.
 

Dont worry abot that, i have modified the case so i can put the TFX PSU in it.
 

No, im not oveclocking.