Hello I just RMAd my EVGA GTX 590 for another card..

[nicoclops]

Is the EVGA GeForce GTX 770 Dual SC an upgrade or a downgrade?

 

[jitpublisher]

I would consider it a small upgrade. Performance is, on average, slightly better than your 2 generation old 590 at 1080, and the 770 has newer features, uses about half the power.