No sanctioned ATI drivers allow overclocking.  Download the tool called ATI Tool to do what you want.

After reading the original post in this thread, my reaction was the same as CSPlayer. In addition, this card is one of the top cards on the market right now, so why would you even think to OC it? That's just dumb. The stock configuration of this card will run any game on the market right now on the highest settings.

The benefit of gaining even marginal utility by OC this card does NOT outweight the risks.

When you installed the ATI drivers did you also install the Catalyst Control Center?  The Overdrive option is listed within there.

You will need to install .Net framework first which is available from Windowsupdate if you do not already have it installed.  In addition, if you do need it make sure you have all the lastest service packs that Windowsupdate will find for the .Net framework.

 First,Thank you all for your replies. Now, To answer some questions. I do have the latest version of Net Framework 1.1 downloaded. I did download the catalyst control center and when I looked under advanced settings and custom settings the Overdrive option is not there. The reason I wanted to use this option in the first place is because I am well aware of the performance this video card is capable of and I am getting the performance of a lesser card. I am sure you are all aware of what Dell did to the Nvidia 6800 series video cards in there systems. They call there cards Nvidia 6800 GTO's but in reality they are NOT a Nvidia 6800GT. They are detuned and fall somewhere in between a 6800 and a 6800GT. So, I am thinking that ATI does not allow overclocking this card because it is pretty much tweaked from the factory, or Dell has done their " Magic" with this card also.  

You are not the first to have mentioned a missing Overdrive 3 module from the the Catalyst Control Center I thought before that it was a software glitch since many people do have problems with control center such as Control centers failure to Load (startup) I believe that was a net framework problem. I wish we could get a few more owners of Dell Version X850 XT PE to weigh in on this problem but by the nature of this board it isn't till someone has a problem with their system do they post here.

If you want your Core and Memory speed down load 3Dmark05 and go to the right side and click details it will give you those numbers. Plus if you run the video test it will give you a number that you can use for comparison here or on sites that others use to compare their scores.

Message Edited by fiber4now on 04-06-2005 08:06 PM

If you are even thinking about overclocking the X800XT don't do it.

It is already maxxed out and you WILL blowup the Memory, DDR3 gives no warning as it doesn't get hot, it just gives out.

Why risk a $600 video card?

FYI:

I blew the memory on a X800 Pro, there was no warning at all, luckly it was a full retail card and I returned it the same day I bought it.

Don't risk it.

O.K. I finally got my answer. The official word from ATI is: The OVERDRIVE aspect found in the advanced view of the CATALYST CONTROL CENTER is currently unavailable for the RADEON X850XT PE. ATI engineering is aware of this issue and investigating. Any updates will appear on this page (online support-knowledge base) when they become available. You CAN safely overclock 800 series ATI video cards using ATI drivers and the overdrive utility and maintain your factory warranty but not with bootleg software such as rivatuner, etc.