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Old 07-28-07, 10:35 PM   #1
Rob_0126
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Join Date: Nov 2003
Location: USA
Posts: 323
Default 5900XT and Titan Quest Underclock Oddity

Yep, I want to underclock my v card. I am using rivatuner.

The defaults for the XFX 5900XT are:

2D:
- 300mhz clock
- 800mhz memory
3D:
- 390mhz clock
- 800mhz memory

Heres the odd part:

When I set the 3d clock to anything below 375mhz, I get some lockup in Titan Quest. I had it set at 350mhz, and I left the hardware monitor in rivatuner on to see the results.

Well, at the point of crash, the mhz actually jumped to 375mhz and the VID dropped to 2.

When I make it at least 375mhz, seems fine so far.

btw, I set 2d at 250mhz, cause I dont need my desktop blazing fast(seems fine at 250)

Reason: Keep the core cooler. cooler=lasts longer

I dont see but a few fps drop with core coming down(using fraps), no biggy to me.

Not sure what dropping the memory speed would do for the fps, or the memory modules cooling themselves.

Any pointers?

Why would setting flat defaults to 350mhz for 3d, ingame, would actually jump to 375mhz and drop VID to 2? Puzzles me,

Anybody got a clue?

Robert
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