Yes the Sapphire HD 7970 OC BOOST 3072MB GDDR5 as good as the GHz edition and comes with Crysis 3 & Bioshock GREAT DEAL !!!
Heres another much less cost : http://www.novatech.co.uk/products/components/amdradeongraphicscards/amdhd7970series/Powercolor/AX79703GBD5-2DHV3.html#utm_source=google&utm_medium=base&utm_campaign=products
All you need to do is open TRIXX or afterburner and you can easily take the clock upto 1125MHZ so no worries