from wikipedia
AGP port pinout
https://en.wikipedia.org/wiki/Accelerated_Gra … onnector_pinout

A1=+12V
B2, B3=+5V
A5, B5= Ground
solder there....
😀

Best place to take power is from the various tantalums or fat ceramics which are gonna be sitting between some power rail. I used a big cap near the voltage regulator chip for fan power on my Banshee card :

The 5 pins component on left of the heatsink is probably a voltage regulator. I can't read the reference.
I'm quite sure we can find the datasheet and get 12 volts from it.
Or on a capacitor as above.

Edit, according to EZ1580 pinout , input is on pin 5.
https://pdf1.alldatasheet.com/datasheet-pdf/v … H/EZ1580CM.html

here's my solution, without attaching anything on to the card itself

butchered my case to add a side fan that i had lying around too

Well as I suggested someone should probe the +5v on the feature connector and check if it corresponds to the +5V coming from the motherboard via agp. If it comes from there, there shouldn't be any problem to plug a fan on there.

Deksor wrote:

Well as I suggested someone should probe the +5v on the feature connector and check if it corresponds to the +5V coming from the motherboard via agp. If it comes from there, there shouldn't be any problem to plug a fan on there.

How to do this?

Simply probe both pins with a multimeter an check if the resistance is 0ohms or pretty close. I could check this soon as well, my v3s are at home but I'm not currently.

why do u want to put stress on a voodoo 3s vrm.

I just measured pins from PCI connector that were 5v and used those to power a 12v fan to cool my V3 2000 PCI that has 3000 BIOS flashed onto it. No problems at all and fan runs nice and quiet. Hate loud whining fans (no pun intended)..

Deksor wrote:

Well as I suggested someone should probe the +5v on the feature connector and check if it corresponds to the +5V coming from the motherboard via agp. If it comes from there, there shouldn't be any problem to plug a fan on there.

Then you fry the card. I can't see the amperage the feature connector can handle a fan.

But this is what I'm asking ! If the +5V found on the feature connector is coming from the motherboard directly, there's no such thing as overcurrent on the feature connector or vrm !

According to the pinout, these +5V pins are "N/C" so they shouldn't do anything actually. The reason why they have +5V is unknown.

Also, the noctua fan that was quoted earlier (NF4a10x 5v) takes 0.05A / 0.25W max. Is this that big of a deal ?

First you need to make sure they actually are 5V lines, rather than some digital signals. Multimeter will not be able to tell a difference, outside actual continuity check against 5V elsewhere such as HDD or mobo power connector. Safest locations are the various tantalum capacitors, they are guaranteed to be on the various power rails.
If those feature connector pins carry some actual signals then fan won't do a thing or in worst case actually damages the signals since some random IO pin will not be able to supply more than couple tens of mA in best case.

Ok I tried the two 5v pins for continuity on the Agp connector. There wasn't any. Some of the pins showed some resistance. For now this project is on hold. 🙁