Ah right. Thanks. I'll look at a 350-400w psu then.
May 5, 2012 6:27:54 PM
disclaimer: people are going to freak out but i know my facts.
you could squeeze a 7750 with your PSU IF it is a quality one:
in that bench from AMD Radeon HD 7770 And 7750 Review: Familiar Speed, Less Power the max was 200 watts with a more powerful system than what you have. Processors
Intel Core i7-3960X (Sandy Bridge-E) 3.3 GHz at 4.2 GHz (42 * 100 MHz), LGA 2011, 15 MB Shared L3, Hyper-Threading enabled, Power-savings enabled Motherboard
Gigabyte X79-UD5 (LGA 2011) X79 Express Chipset, BIOS F8 Memory
G.Skill 16 GB (4 x 4 GB) DDR3-1600, F3-12800CL9Q2-32GBZL @ 9-9-9-24 and 1.5 V
conservatively your i3 will draw 50 watts less making the max consumption 150 watts (approximately 68% load for your 220 watt PSU.)
if you have any doubts about the quality of your PSU DO NOT TRY THIS THEN and get a quality 350 watt PSU.