strange experience with overclocking

[Yggdrasil]

Hi.
A few days ago I posted a message about some annoying graphical errors in Quake3. Using the new turboGL driver I got dotted white lines all over the screen in certain parts on almost all maps. There was another person (I'm sorry, I forgot the nick name) who experienced the same thing but it probably is not a common problem.

Recently I experimented with overclocking, I have a Celeron433 which is running at 488Mhz right now (bus speed at 75Mhz). The really strange thing is: Since I've set the bus speed to 75Mhz the dotted lines have disappeared !

Well I'm both pleased and confused by this curiosity. I remember the other guy I mentioned was overclocking his CPU too but but that did not affect the graphical errors on his system. So I wonder if someone can enlighten me with an explanation to this ? I always thought that overclocking might lead to artifacts and errors. Well in my case it fixed them pretty well .

My System: Celeron433@488, Matrox G400 32MB Ram, Soundblaster Live, 128 MB Ram, Asus P2B motherboard.

[Yggdrasil]

Thank you all for replying.
According to the PCI list tool my AGP port is running at 2x mode with both 66Mhz and 75Mhz bus speed.



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The shortest distance between two points is under construction.

[Maggi]

I guess those dots appeared while using an FSB of 66.6MHz ...

Now that you bumped up your FSB, it's most likely that the drivers switched back to AGP1x and if you don't see those dots anymore, it was probably a result of using AGP2x ...

Try PCI list from www.entechtaiwan.com to get a readout of your actual AGP mode and if possible, clock back your FSB and check that AGP mode also.


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Cheers,
Maggi
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Working Rig:
Asus P2B-DS @ 100MHz FSB
Double Pentium III-450
4 x 128MB CAS2 SDRAM
Matrox Millennium G400 32MB DualHead
Eye-Q 777 (22" with 127kHz) on primary VGA
Nokia 445Xi (21") on secondary VGA

Home Rig:
Asus P2B-S Bios 1010 @ 100MHz FSB
Celeron 333A @ 500MHz
2 x 128MB CAS2 SDRAM
Matrox Millennium G400 32MB DualHead @ 150/200MHz
CTX VL710T (17")
and a brand new Pioneer 303S SCSI-DVD

[Daniel Fazekas]

Using the Matrox overclocker I would too get the random white dots in Q3 if I set it too high.

Actually, I found 107% to be the highest stable setting at 800x600 for my G400 MAX otherwise I get the white dots, even if rarely.

This is on a P3-500, CPU not overclocked. AGP is always 2x.

[Maggi]

yep, those white dots are dropouts caused by your memory being exceeded ...