What is the difference between these three GPUs?

[Linnaeus]

What is the difference between Lightning, Tri-X, and Vapor-X in terms of cooling? Should I just go with the cheapest one?

http://pcpartpicker.com/part/msi-video-card-r9290xlightning
http://pcpartpicker.com/part/sapphire-video-card-1003612sr
http://pcpartpicker.com/part/sapphire-video-card-100361vxsr

 

[i7Baby]

It's their own name they give to their cooling system along with factory set overclcoks.

To see what's best you need to see comparative reviews. eg http://www.tomshardware.com/reviews/radeon-r9-290-and-290x,3728.html

I generally think Sapphire have the best coolers. And that's what allows them to overclock more than competitors.

 

[KryssNova]

Get the Sapphire Radeon R9 290X 4GB Tri-X (http://pcpartpicker.com/part/sapphire-video-card-1003612sr), from all the ones you posted.
Since they are all the same GPU model, just different brands with cooler types.
and just brand and cooler types, little difference is not worth around 100$ more!