I bought the above card a couple of months ago and after about a week I intermittently got a high pitched tone from the pc when gaming which could only be solved by rebooting. It went away until I started gaming again. I then had to leave the pc for several hours before it would not happen again. Now it is happening every time I play a game with a marked slow down in speed. any ideas? I am using an athlon 1.4GHz, 512 Mb RAM, lateste drivers for motherboard and graphics card installed.