Overclocking your X1800XT


Overclocking any X1K isn't very easy, as you will soon find. But, if you follow this guide closely, you will surely have some success.

OC3D will not be held resposible for any issues that may occur as a result of following this guide. Overclocking your X1K card with any 3rd party application VOID's your warranty.

First off, before we start, adequate cooling is a must.  Stock coolers will work, but only if you run upwards of 75% fan speed in-game.  There arent many 3rd party heatsinks out there either, that work properly with X1K cards.  I reccomend removing your stock heatsink, and applying a thermal paste such as Arctic Silver Ceramique, to squeeze some more performance out of it. 

Now, let's begin the process. First off, you need to disable ATi's services and startup programs.

To do this, click Start, then click Run.

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A window will appear. Type in msconfig and click OK.

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When you click OK, another window will appear. This is the System Configuration Utility. To disable ATi's services, click the Services tab. At the bottom of the window, click Hide All Microsoft Services.

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You will need to un-check two things. Ati HotKey Poller, and ATI Smart.

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Once you've unchecked those two services, click the Startup tab. Search for cli, this is ATi's Catalyst Control Center, or CCC. This wrecks havok on ATi Tool, and other 3rd Party overclocking applications.

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Once you have un-checked all three things, click OK. Another window will appear, asking you weather or not you would like to restart your computer now, or later. Click Restart, to do it immediately.

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Now for some ATi Tool fun.

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Most Recent Comments

05-04-2006, 19:09:51

OK Nick, spill the beans I've downloaded atitool, but whenever i get it to auto detect max clocks, i get a corrupted screen.If i increase the speeds manually, it works fine, and i can also increase the voltages to push it further (not sure whats a safe max violtage tho - any ideas?)I've read that its quite easy to flash to an x1800xt pe, but whenever i try and do anything at all near the bios the screen just corrupts on me I dont think the card is faulty or anything tho as it plays games 100% ok.Quote

05-04-2006, 19:20:57


05-04-2006, 19:35:28

First, go into MS config and disable the things in taht thread, and also cli.exe

Also, DO NOT use auto clocks, it screws everything up w/X1K cards.

Try 650/750. Play CS for 30 minutes. Also


1.35v core

2.097v ram, those are stock 3d volts.


06-04-2006, 04:39:07

I've disabled all the things you said, and it now allows me to OC, but any ideas why i cant backup/flash (either atiwinflash or atiflash) the bios on the card without it corrupting the screen?

Edit: One last thing, in every overclocking tool i use it says my core is 600mhz, when its supposed to be 625.Quote

06-04-2006, 11:58:06

you get the beta atitool mate?Quote

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