I don't think you'll find a name or brand for them. A lot of those type of heatsinks are just custom machined from larger sections, probably by a company that got an order for "5000 of the 60mm x 60mm extruded type". Your best bet is to probably try and track down some generic finned heatsinks (not specifically for computer use) and cut to size.

Hi, Try passive heatsink on eBay. For example "socket 7 passive heatsink".

rochadb wrote on 2021-01-30, 22:06:

Hi, Try passive heatsink on eBay. For example "socket 7 passive heatsink".

Nothing 🙁

I have an IBM 300GL that has this heat sink "https://www.ebay.es/itm/Dissipateur-Processeu … u0AAOSwbJJe19J0".
Bigger than the one in your photo but fairly similar.

Hoping wrote on 2021-01-31, 11:31:

I have an IBM 300GL that has this heat sink "https://www.ebay.es/itm/Dissipateur-Processeu … u0AAOSwbJJe19J0".
Bigger than the one in your photo but fairly similar.

it’s similar but not the exact one . My old one is taller, and you can’t tell easily but it was as much black as it was dark purple

Thanks though :p

Sphere478 wrote on 2021-01-31, 12:23:

Hoping wrote on 2021-01-31, 11:31:

I have an IBM 300GL that has this heat sink "https://www.ebay.es/itm/Dissipateur-Processeu … u0AAOSwbJJe19J0".
Bigger than the one in your photo but fairly similar.

it’s similar but not the exact one . My old one is taller, and you can’t tell easily but it was as much black as it was dark purple

Thanks though :p

These heatsinks were quite commonly used by OEMs (and perhaps sometimes some of the 1 man PC builder shops) and would often be accompanied by either generous amounts of TIM (sometimes even with the heatsink being mounted without a clip and just the TIM holding the heatsink in place) or a metallic pad which was supposed to conduct heat from these otherwise already pretty cool running CPUs (usually Intel Pentiums).

I've around a box of these passive heatsinks, I never ever seen these being sold retail or boxed like ever.

They usually have a relatively thin base, so I wouldn't expect them to be great at conducting heat from the CPU even though they might look impressive.
Their tall fins do make them (as I would imagine at least) somewhat more effective at cooling when passively cooled by a case fan or PSU fan.

These anodized aluminium heatsinks seemed to be relatively cheaply made (though still fairly large compared to contemporary CPU heatsinks), but they did come in a lot of pretty colors including the black-like deep purple color you mentioned earlier, but also in green and in blue.

I doubt anyone would even see a market for these heatsinks, but if you really want such a CPU HSF, you could try and keep an eye out for a search tearm something like "anodized heatsink" or "anodized aluminium heat sink" etc.