hi i ive had a few issues of late with my psu/graphics card. i could not get to the bottom of the issues to see if the card was faulty or the psu. i have decided to change both as i have had a full refund for my gtx 660ti. my card budget is around £250 and psu £100. i have a 750watt at the moment. iam not sure what card to buy however a gtx600 series or a gtx 760. i had asus brand before and it was a very good card however a lot of people use msi and the gigabyte version seems more powerful on comparison sites. please help my head is spinning.