I'm looking to buy a GPU for my first build. I'm willing to spend around £300, and i'm currently debating between the GTX 770 and Sapphire AMD HD7970 Ghz Edition, however i am open to any other options.
Build Specs -
CPU - Intel i5 3570k
RAM - 16GB 1600Mhz
Motherboard - Asus P8Z77-V
Of those two, the GTX 770 is a bit faster and noticeably quieter - especially the Asus and MSI models.
GTX 760 would be a great option too if you're on a tight budget. It'd give you the option to SLI later (if your PSU allows it) for a modest cost but GTX Titan -class performance. Buying two 760s right away would of course go well over your budget, but if you buy one now and a second one a year from now, you're going to get the second one much cheaper.
Dont get a sli or crossfire setup, in the end its better just to get good strong cards and replace them as the years come vs getting a second card a year later because of new tech better efficiency and other things.