I get a similar image with Monster 3D II in SLI at 800 x 600. The image is frozen and I need to shut down the PC.

One card reports less memory, so who knows what else is wrong with it.

Would be nice if there was a tool/utility that can test the vram for errors as that is likely the problem. Any other games that act up at all in any way?

So far not. I have Deus Ex as well, will test that when I get a chance.

I should probably add that the game does still run when those patterns appear, and as a fun fact, single-chip 1600x1200 Unreal appeared a good deal faster than dual-chip Quake 3....

Interesting. My cards in SLI lockup with that pattern at 800 x 600 in every game.

I removed the faulty card and a single card does 800 x 600 without any dramas.

I will try to source a replacement card to continue my Voodoo 2 scaling project 😀

I don't know how accurate it is, but the 3dfx control panel lists the card as having 64 MB.

Tried Deus Ex and same thing there. Anyway, now it's getting really bizarre... when running any form of AA, the patterns disappear at 1600x1200. It's almost as if the combination of high resolution and high framerates is somehow playing a role here... furthermore, choosing Direct3D or OpenGL renderers also eliminates the issue; so far it's exclusive to Glide/1600x1200/SLI/non-AA. I don't think I have any more Glide games which allow resolutions that high though, to test if it might be related to UE1...

Quite weird! You're saying Deus Ex produces the same result? How about trying different drivers or patches for the games?

nforce4max wrote:

Would be nice if there was a tool/utility that can test the vram for errors as that is likely the problem

U could try this one. http://mikelab.kiev.ua/index_en.php?page=PROGRAMS/vmt_en

F2bnp wrote:

Quite weird! You're saying Deus Ex produces the same result? How about trying different drivers or patches for the games?

I use the latest reference drivers and fully patched games. I see the chances of that being the cause as slim tbh. And anyway, as long as every other res works I'm content, a lower resolution with AA has the benefit of legible HUD elements 😀

Nahkri wrote:

nforce4max wrote:

Would be nice if there was a tool/utility that can test the vram for errors as that is likely the problem

U could try this one. http://mikelab.kiev.ua/index_en.php?page=PROGRAMS/vmt_en

0 errors on default settings.

could it be because of a power/overheating issue?

Unless it's something on the card itself I doubt it, this PC has a modern 430W PSU and the card takes its power directly from there of course... why would it be only on Glide and not the other APIs though? Doesn't make a lot of sense really 🤣

64MB (32MB per GPU) is correct if this is a 5500. How does it/the system do running some sort of stress-test? (like looped 3D99 or something)

Have you tried re-installing the problem game/driver? Can you test the card in another system?

Good call on looping some benchmarks, might do that. It's three games exhibiting the problem so far, all UE1 and Glide, so I'm not sure which of those factors are significant yet... need more Glide games I guess. I have Dethkarz actually but I doesn't allow anything above 1024x768. Probably caters to Voodoo2 SLI limitations. And nope, this is the only PC I have where this card will fit... a S370 440BX system with a Pentium III 1100, for reference.

d1stortion, Dethkarz allows 1600x1200 in D3D. Perhaps it can be forced to the same resolution in Glide? btw, in order to let you chose video mode each time you start Dethkarz, add /c key to the shortcut.

Nope RacoonRider, Glide is indeed limited to 1024x768. With D3D the game is displayed fine even in 1920x1440.

Okay just to clarify:

All games at all settings no matter what will work fine at all resolutions if run in D3D or OGL modes?

But specific settings with specific resolutions will exhibit problems if run in Glide modes?

I'd look at the software side more than anything else - unless it goes down running a stress-test or something, and then you might have a hardware failure.

Other random question: does changing color-depth settings or refresh rate settings do anything at all for it?

obobskivich wrote:

Okay just to clarify:

All games at all settings no matter what will work fine at all resolutions if run in D3D or OGL modes?

Yup.

obobskivich wrote:

But specific settings with specific resolutions will exhibit problems if run in Glide modes?

Unreal, Unreal Tournament, Deus Ex so far, but only in Glide/1600x1200/SLI/non-AA. Like most/all? Glide games they seem to lack flexibility when it comes to resolutions, so I can't force any higher resolution than what is presented in the menu.

obobskivich wrote:

Other random question: does changing color-depth settings or refresh rate settings do anything at all for it?

For some reason I wasn't able to change the refresh rate. Changing it to 60 Hz both in Unreal and in the desktop settings, my monitor reported it to be 75 Hz still ingame... but great call on changing color depth! Forcing 32 bpp causes the patterns to disappear... mostly. The image is displayed normally for the most part, but there are some faint wavy lines which remind me of a LCD with wrong clock/phase settings for the VGA input (I use a CRT). They can only be seen on bright backgrounds really and my crappy camera can't pick them up so no use in posting a picture. I tried single chip mode then and the difference in comparison to the normal image was noticeable.

Probably not much use in asking, but it would be interesting if someone with a similar setup could try what I've described in this thread. If it really were an error on the software side it'd certainly be the weirdest one I've come across so far. 😀

Wish I still had a Voodoo5 🙁

Just ran Unreal 1600x1200x16 (Glide) on my K6-3+Voodoo5 machine. Everything looks fine here.
I tried to set the refreshrate in the game to 75 Hz, but it stays at 60 Hz. I also tried to turn Vsync off, but the framerate jumps between 30 and 60 fps, so I guess it's still on.