Alice Averlong🏳️‍⚧️Jan 22, 2023
it probably doesn't help that my CPU fan died.
it's for a pentium 1, so it's slightly old
Show threadAlice Averlong🏳️‍⚧️Jan 22, 2023
OH MAYBE THIS IS WHY
this is not how 3 pin fan connectors work! This is going to try to undervolt your fan backwards while putting +12v down the tach-out pin
Show threadKevin Karhan Jan 22, 2023

@foone wow... Either this board says "Get f**ked!" or it literally predates 3- & 4-pin fan connector standards....

Tho this means you can - theoretically - adapt a 5V Noctua to it or undervolt a massive cooler...

Show threadTorazChryxJan 22, 2023
@kkarhan @foone Any pentium 1 should run passively with any remotely modern tower heatsink on it I'd have thought? 200Mhz non-MMX or 233Mhz MMX Pentium both have a TDP that's sub 20w IIRC? (of course there's the issue of attaching a modern cooler with appropriate mounting pressure but still though.)
Show threadKevin Karhan Jan 22, 2023

@Torazchryx @foone that's why I'd look at the original mounting hardware and find some off-the-shelf heatsinks and cut that to size and get modern thermal paste on it.

AFAIK the original Pentium does have a ceramic body like the Motorola 68040 and thus it doesn't have like an exposed die that could crack or short out.

Show threadKevin Karhan Jan 22, 2023
@Torazchryx @foone
But in the end you're correct: Even the shitty #LGA775 / #LGA1155 Intel Boxed Coolers with plastic push pins will likely even have enough surface to work "semi-passive" if the case is some ATX-style with somewhat airflow of the power-supply exhausting the warm air to the rear.
Show threadKevin Karhan 

@Torazchryx @foone it's ~ 17W TDP according to both INtel and CPU World...

https://ark.intel.com/content/www/us/en/ark/products/49967/intel-pentium-processor-with-mmx-technology-233-mhz-66-mhz-fsb.html
https://www.cpu-world.com/CPUs/Pentium/Intel-Pentium%20MMX%20233%20-%20BP80503233.html

Product Specifications

quick reference guide including specifications, features, pricing, compatibility, design documentation, ordering codes, spec codes and more.

Jan 22, 2023 at 4:04amWeb