Alright, I thought I'd ask the community for answers, and I decided tom's hardware was the best place for it. I recently had an Gigabyte GTX550Ti 1Gb, after a while it was fine, nothing wrong at all. Then I started having heat issues with it, I took it out and investigated the problem and I noticed where the ventilation area is, the metal has discolored to a blue to bronze to brown color. And on the PCB where the DVI ports are, around them is the same color on the metal. So I contacted Gigabyte and they were clueless and I had no idea what to do. The clocks on that card was Core - 900/4100 MHz Then the memory clock got halved to 2050MHz. So I was getting frustrated and decided to try and overclock it back to it's original state, but most tools only allowed me to reach a max of 2520MHz. So yesterday I bought a new graphics card and took my Gigabyte GTX550Ti in to get the warranty and get a new one in place. I didn't know at that moment I was going to get a new one, but it would have seemed to be more expensive to get it repaired if the warranty expired than to buy a new one. So confident that buying a new graphics card would fix the problem, I bought a Leadtek Winfast GTX550Ti 2Gb version. Got home, put it in, updated all the drivers to the latest as they can be, and I checked the clocks and instead of getting the clocks it's meant to have which are 810/4008 MHz. But same issue, and it isn't faulty and brand new. The clocks I'm getting now are quite poor - 900/1800 MHz. So my question is, where is the other 2208 MHz gone? And the 900/1800 MHz is not power saving mode, power saving is 50/135 MHz. I really need help with this please, I have no idea what to do or where to look or what to pin point as the problem. Cheers!