im looking for a power supply that will work with a r9 280x

[Logo09]

Would the corsair cx750m work?

 

[Gam3r01]

It would work, but the CX lineup has some lower quality capacitors that tend to fail often.
What is your budget for the PSU?

 

[lightcloud]

I would not go with the CX Series by Corsair they are cheap and low quality made in China. But if you want it as a temporary PSU then it spill be fine for a few months.

Some good manufacturers for PSU are Antec, EVGA, Seasonic and Thermaltake just to name a few.
http://www.tomshardware.com/answers/id-1804779/power-supply-unit-tier-list.html

 

[Baconhashtags]

Seasonic all the way and the Corsair GS has been recommended for gaming and is about the same price but is only 600w

 

[Baconhashtags]

I would tend to look at the features it has, if its cheaper buts keeps your hardware safe in event of failure then you could probably take the risk and buy the cheaper model, but get one with a decent manufactures warranty. A good rule of thumb is calculate how long you would expect to use the psu and buy one with a warranty as long or close to it.

Simples !

http://www.corsair.com/en-gb/support/warranty