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Why is my Visiontek Radeon 9100 running in 350mhz DAC?

P

PoPPeR

Diamond Member
The box states 400, my control panel says it's running in 350. I have the latest ATI drivers. What can I do?

also, how can I overclock it? I'm new to the ATI world, all my past cards have been Nvidia's
 
It should make no difference to you whatsoever, unless you're driving a 24" widescreen monitor at an insane resolution. As you bought a budget card, I'm assuming you're not going to come close to hitting the max res/refresh 350MHz limits you to. RAMDAC speed does not affect 2D or 3D performance, it just determines how high a resolution and refresh rate the video card can support. You can calculate how much of the RAMDAC's "capacity" you're using by multiplying your resolution by your refresh rate. For instance, 1600 * 1200 * 100Hz = 192MHz, plus a little extra for overhead. That's way under your 350MHz RAMDAC cap, and probably well above what most people run their monitors at.

As for why, it may be a driver problem. I think Powerstrip may have a utility to actually determine RAMDAC speed. Usually RAMDAC speed is just specified in the driver files, so it may have been entered incorrectly.
 
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