Easycargo 4pcs 40mm Copper Pad Shim Thermal Kit, Cooler Copper Pad heatsink for Cooling Sony Playstation 3 PS3, 3D Printer, TEC1-12706 Thermoelectric Peltier Module CPU GPU Laptop 40mmx40mmx0.5mm

So I got it today, it came in a box for other thermal kits so I was confused until I opened it. It also doesn't look like in the picture. They are actually perfectly square(sharp corners), thin and look cut by some cheap metal cutter(some edges imperfect). Being thin was actually good for me as I needed thin pieces to place in the gap in the backplate of my RTX 5080 GPU, sandwiched by two pieces of thermal pads and then a thin heatsink with fans on top. Lowered my GPU temperatures by another 2c by adding the copper piece in between the thermal pads(stacking too many thermal pads directly on top of each other will transfer less heat). Fit perfectly and I only needed 1 piece to level it with the GPU backplate before I attached the extra heatsink with fans. Now my GPU stays at 59-62c under full load with an aggressive overclock.

I thought I'd get fake, aluminium/steel... But tis the real deal. Cut a piece in two, weighed exactly what it should and measurements fairly precise . "Oxygen free" Thanks for selling and being honest. A rare find now a days

Good product that I used for a heatsink on a mini PC CPU. I grinded to the size I needed and used ARTIC MX-5 Thermal Paste. A bit expensive but would recommend.

Ordered to use between my CPU and cooler to increase the tension of the cooler to the CPU to improve cooling.. Two of the four received have creases in them meaning they are not flat. The shipping container nor the item package show any damage. This means the material the manufacturer used had the creases in them when made. Not a good thing when they intended to be used as cooling enhancers.

they spread the cpu heat evenly

These are fairly small sheets of copper but that means you probably won't have to cut them down to size when using them as a CPU heatsink. 4 came in the package and I used 1 of them for its intended purpose. The other 3, I use as shims in my disk cutter in order to balance and level the 2 disks when making my punches.

Enough said.

This is being used as a project I'm working on. I'm modding my Steam Deck and using this to put under the heat shield. It fits exactly how I wanted. Dunno if it improves or hurts performance, but it is exactly what I needed. Overall, I'm happy with it.