Hi, firt sorry for my english : ) I bought an XFX 275GTX and I experienced some problems. When Im Playing the system shuts down. whats wrong? 36 A not enough for this ? I have a Thermaltake toughtpower 700w modular. Is some kind of power fail? I have read that 700w PSU was enough por that VGA.
First check your temperature readings inside the BIOS. Let the PC run at idle for at least 10 minutes and watch your CPU temp. The power supply could be doing exactly what it is supposed to be doing by triggering a shutdown (over-current/overvoltage protection) protecting the rest of your hardware.