How is the air flow in the case? Cooling might be an issue.

I would also double check with another game, ideally something that doesn't use the Unreal engine. (will confirm its not a game/driver issue)
So you have tried each card separately with the other removed completely from the PC. (will confirm which card if any are faulty)
If both cards work fine by themselves but not in SLI, I would try my luck making another SLI cable, much cheaper easier to replace then a voodoo card

MrEWhite wrote:

So, I have 2 Voodoo 2 Black Magic cards, when I disable the second card and try to run Unreal Tournament at 800x600, the game has pink artifacts on the screen. I took the second card out at the artifacts disappeared pretty much (again, this one was disabled). Is this an issue with my cards or something else? Removing the SLI cable fixes this issue, but I think it still shouldn't be happening.

Is the pink artifact a static block on your screen? And if so, does it change position when you change resolution?
In that case, it might be a memory chip.

Tetrium wrote:

MrEWhite wrote:

So, I have 2 Voodoo 2 Black Magic cards, when I disable the second card and try to run Unreal Tournament at 800x600, the game has pink artifacts on the screen. I took the second card out at the artifacts disappeared pretty much (again, this one was disabled). Is this an issue with my cards or something else? Removing the SLI cable fixes this issue, but I think it still shouldn't be happening.

Is the pink artifact a static block on your screen? And if so, does it change position when you change resolution?
In that case, it might be a memory chip.

It was on textures across the entire screen.
But it only happened with one card disabled and only with the SLI cable in again. So, could this be a software issue?

chinny22 wrote:

If both cards work fine by themselves but not in SLI, I would try my luck making another SLI cable, much cheaper easier to replace then a voodoo card

The cards work fine in SLI, I was just doing some testing and came across this issue.

And the same issue is in Quake 2. But again, both the cards work by themselves completely fine, and in SLI. It's only when I have the SLI cable in and I disable a card it happens

MrEWhite wrote:

It was on textures across the entire screen.
But it only happened with one card disabled and only with the SLI cable in again. So, could this be a software issue?

Swap the 2 cards around (move each to the other's slot) and test again.

stamasd wrote:

MrEWhite wrote:

It was on textures across the entire screen.
But it only happened with one card disabled and only with the SLI cable in again. So, could this be a software issue?

Swap the 2 cards around (move each to the other's slot) and test again.

Still happens.

Is it an original cable? If not, check its length/quality. I used to get weird artifacts on single card mode (not this one, but random artifacts that weren't there when testing each card separately) when my homemade SLI cable was somewhat longer than the stock cable they shipped with the cards back then. Maybe these artifacts weren't so apparent in bigger resolutions, however I'd swear everything was fine at 1024x768.

psychz wrote:

Is it an original cable? If not, check its length/quality. I used to get weird artifacts on single card mode (not this one, but random artifacts that weren't there when testing each card separately) when my homemade SLI cable was somewhat longer than the stock cable they shipped with the cards back then. Maybe these artifacts weren't so apparent in bigger resolutions, however I'd swear everything was fine at 1024x768.

It's one of these http://www.ebay.com/itm/SLI-Cable-for-3DFX-Vo … s-/131817328341

MrEWhite wrote:

The cards work fine in SLI, I was just doing some testing and came across this issue.

And the same issue is in Quake 2. But again, both the cards work by themselves completely fine, and in SLI. It's only when I have the SLI cable in and I disable a card it happens

Am I missing something why would you even want to do that? Isn't any SLI drawbacks is there?
But the fact Quake does it as well means its not the games fault. Which drivers you using? some of my computers seem to prefer the fastvoodoo others only like the official drivers.

PS $10 for a sli cable! Its a fair price but good money for a simple floppy cable hack

chinny22 wrote:

Am I missing something why would you even want to do that? Isn't any SLI drawbacks is there? But the fact Quake does it as well […]
Show full quote

MrEWhite wrote:

The cards work fine in SLI, I was just doing some testing and came across this issue.

And the same issue is in Quake 2. But again, both the cards work by themselves completely fine, and in SLI. It's only when I have the SLI cable in and I disable a card it happens

Am I missing something why would you even want to do that? Isn't any SLI drawbacks is there?
But the fact Quake does it as well means its not the games fault. Which drivers you using? some of my computers seem to prefer the fastvoodoo others only like the official drivers.

PS $10 for a sli cable! Its a fair price but good money for a simple floppy cable hack

I've tried fastvoodoo and the official.

I was just doing some testing in framerate and graphic difference for my own personal use. Can anyone else test their Voodoo 2s and see if this happens?

Check all the small legs on the 3dfx chips, maybe these legs touch each other

Could you post some pics perhaps?
Of the artifacts and the hardware involved?

Optional is to try the set of Voodoos in another board.

This is what hapeened on my Voodoo 2 12MB (when it was used as a single card). It had two pins of processing unit shorted and one SMD resistor missing plus missing SMD ceramic capacitor. It wasn't detecting full amount of memory. Fixed the shorted legs, soldered new resistor and capacitor and it works fine. Maybe you should look for missing (damaged, detached) components around SLI port.

Before I post pictures of the issue, I just noticed the RAM chips don't share the same speeds. Could this be the issue?

And, apart from the RAM chips, they both look fine after a visual inspection.

MrEWhite wrote:

Before I post pictures of the issue, I just noticed the RAM chips don't share the same speeds. Could this be the issue?

And, apart from the RAM chips, they both look fine after a visual inspection.

Mine have mismatched speeds and I'm not having any issues

Right now I'm trying a Diamond Monster Voodoo II 12MB (If I can get mismatched SLI working) with both of the cards to see if it presents issues.

MrEWhite wrote:

Before I post pictures of the issue, I just noticed the RAM chips don't share the same speeds. Could this be the issue?

And, apart from the RAM chips, they both look fine after a visual inspection.

You can try under-clocking the cards?

They are running at the 90MHz default speed, but I'll try underclocking.

Here's a picture of the artifacting.