Used to play on this exact chip. Honestly I can't see a big difference between the performance I got with that card and the I have now, the EVGA GTX 780. I'm not sure if it's only because I didn't change my CPU, but either way, you should be able to play on very high in most areas depending on the rest of your hardware. Certain parts of Amethera could get rough though, especially when you get those areas with smoke.
This card work very well to play EU.
Used 48xx serie, 57xx and now 7770 and all card worked well for EU. One tip! if you play a lot, clean the cooler every 6 months from dust.