Its normal for a Voodoo to get really warm, though I never had mine just shut down before.

Its a good idea to add at least a passive heatsink to any Voodoo card.

it didnt shut down - just the monitor as the sound was still going

what size of heatsink is needed and would i use thermal paste to put it on

would pci extractor fan also help aswell to help with airflow

would these work with them
http://www.ebay.co.uk/itm/5pcs-28mm-Aluminium … =item19e8d12672

https://www.amazon.co.uk/Evercool-SB-F1-slot- … t/dp/B004ZSC0XS

Depends on the airflow in the case. It would be good if the PCI/ISA slot on the chips side of V1 card is free. Air extractor might be pretty useful as even passive heatsinks need some airflow to do the cooling.

the v1 card has nothing below it on chip side

would it be worth to get both items in links above

Those heatainks and extractor seem like they would do a good job.

You can also get some airflow going by fixing a fan in the hard drive bay area to blow air horizontally. This would help cool any other components thear the voodoo card as well.

would be worth it for long term use

would a any fan work for puting uder hdd bay as i only have the one slot which the hdd is in already

I used double-sided sticky pads to hold a 90mm fan in my case so hard drives getting in the way werent much of a problem.
It all depends in how the case is designed, though.

there is space below the hhd bay to botton of case with the pc speaker at the bottom of case

Got a couple of V1 era cards myself and it doesn't take much to keep them cool, simple passive coolers with a fan nearby will be more than enough to keep it happy. Voodoo 2 is the same though one doesn't need to go to extremes unlike some have gone to.

I currently use a PCI slot exhaust fan directed at the V1 card, still considering heatsinkgs for it. There is also a intake fan at the front of my case (currently mounted to extended ISA card holder)
My V2 SLI setup is a bigger challenge, I 3D printed a special 80 MM fan mount which fits between the PCB of the 2 cards and added a fan, also added a 80 mm intake fan like with the V1 build, also considering heatsinks for the V2 but thats a little more work for what I planned with those.

I have extra cooling on my sli setup and also on voodoo3 cards but i never cooled a v1. Never had a problem but ofcourse cooling it will always be better.

Some of my v1 cards came standard with heatsinks on both chips.

Pairing a v1 with a very fast cpu can make them run a bit hotter.

Kl thanks and I have ordered the passive heatsinks and pci extractor fan and will see if I can easily find a case fan with molex power instead the smaller pin ones