As far as I know, there is no V3 3000 AGP with SGRAM memory. So the only choice is to modify the current BIOS.
Also the V3 1000 is not exacly great overclocker, IIRC it runs at lower voltage than 2k or 3k. So it may not hit 166 MHz at all.

havli wrote on 2022-07-13, 19:55:

As far as I know, there is no V3 3000 AGP with SGRAM memory. So the only choice is to modify the current BIOS.
Also the V3 1000 is not exacly great overclocker, IIRC it runs at lower voltage than 2k or 3k. So it may not hit 166 MHz at all.

Any way to up the voltage?

Lucky! The one I picked up has 5.5ns RAM. I was able to overclock stable at 157.5MHz, and that was with a smallish heatsink adhesively applied and a fan pointing toward it. No heatsinks on the RAM, either. I'll apply better heatsinks at some point.

Make sure you put a heatsink on the backside where the graphics processor is located. It gets SUPER hot.

Winman486 wrote on 2022-07-13, 20:38:

Any way to up the voltage?

I have never done it. But should be possible by modifying the voltage regulator circuit. On these cards it is fairly simple.

havli wrote on 2022-07-13, 21:15:

Winman486 wrote on 2022-07-13, 20:38:

Any way to up the voltage?

I have never done it. But should be possible by modifying the voltage regulator circuit. On these cards it is fairly simple.

Well, I have a broken 3000 I could just swap the voltage regulator.

Swapping the regulators won't help - they are adjustable and therefore the same on both cards. Just with different output settings for V3 1000 and 3000. The settings are determined by resistors. Check the datasheet. https://www.digchip.com/datasheets/parts/data … Z1582CM-pdf.php

Should be no more than a single resistor to change.
There's some 3dfx datasheet around which states the different core voltages the graphics chips use when I remember correctly.
The databook here
https://www.vgamuseum.info/index.php/companie … x-voodoo-3-3000
should have the values.
But no guarantee it works.