Only reason you are seeing such a performance increase is likely because of overclocked cards and disabled V-Sync. FastVoodoo drivers don't do anything that fancy.

Skalabala wrote on 2024-04-23, 12:25:

I am using a rinky dinky socket 7 imbedded power supply
Both cards seem to work fine single.

Odd problems on a PC? Replace the power supply. I have torn too many machines apart trying to pin down an instability, I have seen it done way too many times, and it was the PSU.

You say your PSU is not good, and that one card works at a time: there simply might not be enough juice to run the two.

progman.exe wrote on 2024-04-23, 16:59:

Skalabala wrote on 2024-04-23, 12:25:

I am using a rinky dinky socket 7 imbedded power supply
Both cards seem to work fine single.

Odd problems on a PC? Replace the power supply. I have torn too many machines apart trying to pin down an instability, I have seen it done way too many times, and it was the PSU.

You say your PSU is not good, and that one card works at a time: there simply might not be enough juice to run the two.

I have seen this many times too. always try the psu route when troubleshooting odd errors.

Got a corsair 650W PSU and noting changed.
I overclocked each card individually to 100MHz, both had artifacts. The one card now does not work no more it hangs in any game 5 seconds in.
Could it be that that card was faulty? TMU dead now? 🙁

So it seems that the one card is faulty. Hangs in any 3d app few seconds in. Any idea? I do not see any artifacts.
I already reflowed the 3 main chips.