BUDGET RANGE: I'm willing to spend up to 250$, but if it's worth it I can go a little higher.
USAGE FROM MOST TO LEAST IMPORTANT: Gaming (I'd like to run most new AAA games on high settings)
CURRENT GPU AND POWER SUPPLY: ATI Radeon HD 5770 and Sentey Extreme Rock Power 750w.
OTHER RELEVANT SYSTEM SPECS: AMD Phenom II x6 1055t overclocked to 3.5Ghz, MoBo is Gigabyte GA-880GM-USB3, 8GB of DDR3 RAM, Cooler Master HAF 932 Advanced kit case.
PREFERRED WEBSITE(S) FOR PARTS: newegg.com or amazon.com
COUNTRY OF ORIGIN: Argentina
PARTS PREFERENCES: No real preference. Whatever works best for gamers. Nvidia comes to mind.
SLI OR CROSSFIRE: No
MONITOR RESOLUTION: 1366x768
ADDITIONAL COMMENTS: I'd like a card with proper cooling. My current card is running at 60 degrees most of the time, peaking up to 70 even with the case I have right now. I'm surprised it hasn't fried yet. I was also thinking about upgrading to an Asus GTX 660Ti per a previous recommendation, but maybe there was something new and better I could get for just a few more dollars.
You could also consider AMD's R9 270 (~$180) or 270X (~$200). Although slightly lower in performance, they're only 1 level lower on the Tom's Hardware February 2014 GPU chart compared to the 760, & as you can see can easily save you some money. They're also still cheaper than the GTX 660...which is at the same level on the GPU chart as the AMD card.