In need for temporary graphics card advice

Not A Computer Expert

Commendable
Jun 20, 2016
13
0
1,510
I have a pretty low spec pc that I want to sell sometime soon, to get a better budget gaming pc around €700. For now I have my eyes on the gt 730 series. I don't mind playing on mid-low settings, and I play on 720p anyway.
My question is, do I get a:
1GB GDDR5 128 bus,
2GB DDR3 128 bus,
or 4GB DDR3 64 bus?