so, i have a sapphire HD 5770 a little over a yr now and recently it started giving problems and now it does not wrk most of the time. what happens is that when the computer is turned on the card starts up (the lights on the back of the card light up green and soon after they start to flicker and turn off and the fan spins really fast and loud as if there is no six pin power connector in the card. i gave it to a friend to check it for me and it wrked in his system for about 4 days str8 the started to chip off ...... plz help me if u cud 
My Computer
At a glance
Windows 7 Ultimate 64 bitAMD Phenom II 9554 GB OCZ gold DDR3HD 5770
- Computer Manufacturer/Model Number
- self made
- OS
- Windows 7 Ultimate 64 bit
- CPU
- AMD Phenom II 955
- Motherboard
- MSI 790-fx gd 70
- Memory
- 4 GB OCZ gold DDR3
- Graphics Card(s)
- HD 5770
- Case
- CM Storm Scout
- Cooling
- after market cooler