I use an ASUS EAH4850 and I'm running Windows XP Pro SP3. I was wondering if this is normal (referring to thread title)? If so is there any other software I can use to still monitor these values? I also want to add that for a while now I have been unable to access CCC. I tried uninstalling drivers and software without any results so far. Any idea what I can about this? What's the default voltage of the EAH4850? Is it fixed or does it fluctuate? At the moment the GPU Core Clock is at 500MHz and the GPU Memory Clock at 750MHz when idle and 625MHz and 993MHz when under load. I 've been experimenting a little yesterday and I noticed that OC'ing the card just a little bit causes artifacts. Once I set the voltage higher in ATI Tray Tools the card runs more stable and higher core and memory speeds are possible. But since I can't monitor the VDDC temperatures I dare not mess with these settings. Is ATI Tray Tools a good way to play around with the voltage or should I use other software? Thanks in advance for any help.