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Advice depends on what games you want to play, at what resolution, at what quality.
Most brand new cards under £80 won't run most games well.
I'd aim for a second hand card, you could get yourself a much better card than the 7770.
6870/5870
GTX470/560ti
I'd aim for a second hand card, you could get yourself a much better card than the 7770.
6870/5870
GTX470/560ti
I would go with this as well.+1
Second hand is definetly the way to go with that budget