I got one of these a year or so ago off ebay to cool a Asrock 775i65G/E6700 system in a little Silverstone case. it was to do with a Win98 build but didnt get it up and running past the initial install of Win98.
The Zip100 boot disk was a pain and I put the project on hold for a while. But the cooler worked well.

https://www.tomshardware.com/reviews/scythe-k … ooler,3971.html

I have the fan blowing sideways into the fan, and the cooler fan blowing up through the fins into the PSU fan intake.

Or a CHENBRO 66H080000-046 might work better, but it depends on if your case has an opening or vent in the case at the point above the cooler.