ATi Radeon HD 5770 VS Gigabyte GeForce GTX 560 Ti OC?

Off the top of my head... the GTX 560ti is roughly 80% faster than a 5770. Cards like the 6970 and GTX 570 have nearly double the graphics power of a 5770.

I would address the overheating problems. The heatsink on the card is dirty, the fan is failing, or the thermal compound between the GPU and heatsink is failing.

Yes... I agree with the guy above. Download MSI Afterburner and monitor the temps.

I prefer the GeForce GTX 560 Ti

I would go with a GeForce GTX 560 Ti, they dont heat up as much but if you have MSI Afterburner you can monitor the heat and change the fan speed to help cool it down, you can also OC the video card with MSI afterburner ( OC on the name of a GFX card doesnt mean much, usually is just a 100 MHz OC)

the GTX 560 Ti is much better than the 5770

make sure it is free of dust they collect it easily.

HD5770 will run BF3 on high easily. check you case for air flow you may need to add a fan.

OC 560 TI will run very hot and use more power under full load.

get 6870 HD its the same as 560ti minus sli and software stuff and much cheaper than 560ti and also you can do 2 ati cards which can kick some serious ***

with IMAGINATION ANYTHING CAN HAPPEN SQUIDWARD