best graphics card for 350 pounds?

780=290X >290>770=280x >760 >270X=270 >750Ti...

There isn't any other card that really competes AMD at £320. A GTX 780 is roughly £360+ which would be better as it run cooler.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Video Card: Asus Radeon R9 290 4GB DirectCU II Video Card (£319.55 @ Scan.co.uk)
Total: £319.55
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-17 21:50 BST+0100)


PCPartPicker part list / Price breakdown by merchant / Benchmarks

Video Card: MSI GeForce GTX 780 3GB TWIN FROZR Video Card (£359.98 @ Scan.co.uk)
Total: £359.98
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-17 21:54 BST+0100)