Alphacool 17426 GPU RAM Copper Heatsinks 10x10mm - 10pcs Air Cooling Passive Coolers

Used these for VRMs on Vega 56 after removing blower fan and putting an aftermarket aircooler on it. I had to shave / cut some down because the air cooler mounting legs, but they still cooled the VRMs pretty good.They were about 4.8 grams each vs mid 2 grams for the aluminum. Copper is almost twice as thermally conductive, plus these fins were a lot thinner, so heat transfer is a lot better. Was able to get a good OC on my Vega because of it plus super quiet compared to old cooler.I attached my post install picture. I know it's not pretty, but thermal are dramatically better on the GPU. Since the entire blower assembly directly absorbed the heat from VRMs via thermal pad, the VRM thermals aren't as good, but always under 70 degrees, usually high 40s, low 50s during gaming (this is overclocked with extra power running through them too!).

No self-adhesive, just bare copper bases, but I prefer to do my own adhesive anyway and it saves me having to clean it off first.The heatsinks are great. If I had to complain about something, it would be that as usual Amazon Warehouse Deals didn't check that all the heatsinks were present in the open box package I ordered (or didn't mention it in the listing), and sent me 9 out of 10. I can't rate Amazon Warehouse Deals as a seller, though. On the plus side, I saved enough that it was still worthwhile.

I soldered one 10mm copper heatsink on top of the copper plated thermal via holes on the TMC2209 stepstick.I tinned the via holes added fluz and used a butane torch and tweezers. The fins can be fanned out by inserting a knife blade and bending the fins outward. I did tack the IC in place with some silicon to prevent the chip from dropping off the pcb by accident lol

I bought it to install on my Raspberry Pi 4. Although I knew about its dimensions (10x10) I hoped it would have a good height. You can see the real sizes on the photo.Moreover, it has no sticky surface.100% isn't worth its $15.

Did the job

First impression is that they are packaged very well. All machined very precisely. These are the first I reach for when the size is appropriate.

These fit gddr6 perfectly. Keep in mind gddr6 chips are upside down so their efficiency looks flawed in this application but they do help.

It does what it's supposed to. I used them for a low end motherboard that didn't have a heat sink over the mosfet's and had an issue with thermal throttling. it helps but results will vary depending on mobo quality, air flow and voltage settings used.