Aluminum Heat Sink 150mmx93mmx15mm/ 5.9x3.66x0.59 inch High Power Large Heatsink Module Cooler Fin for PCB Board LED Motherboard Cooling GPU Backplate Radiator Routers RTX 3090 3080 Black

Great quality, especially for the price. Well-designed for heat dissipation. Works well for its intended purpose.

I have a speed controller with 16 MOSFETs that I use for a trolling motor that pulls 55A. This heatsink combined with a fan keeps the mosfets at 28C, which is perfect. I was able to easily cut it to size with an oscillating multitool.

Two of these were the perfect size for my Mac Mini. It does not seem at first to do much but give it a few days. I downloaded an app that measures the heat index of the computer and it did seem to go down once this was applied

You have to buy thermal pad to use this heatsink, it definitely bring my 3090 card temp down. Machine cut with precision, squarely and flat

Worked great for cooling external USB 3.x hard drives during large multi-hour, multi TeraByte, data transfers. When backing up many TeraBytes, it can take half a day or more per drive - sometimes as much as 24 hours. This is because without cooling, many/most drives back off on their data rates as the internal temperature goes up: self preservation.With no cooling at all they were getting very warm and the transfer rates would go down from over 100 MBytes/sec to less than 10 MBytes/sec when the drives got hot.We sandwiched the drives (variously 4 TB and 5 TB) between pairs of these heatsinks back to back using large plastic spring clips. Even just on their edge & convection cooling it worked well. With a small fan they barely get warm. Sustained high data transfer rates were achieved with LaCie (the most temperature sensitive), Seagate, and Western Digital.

Mainly for junction memory heating concerns, altho it reduced the gpu overall heat by a few Celsius on my RTX 3090 Tuf. I used thermal paste and a fan sitting and blowing directly on top of it. With that setup, it reduced my junction memory temp by 14c and gpu temp by 4c. Also, this gpu sat right on top of another RTX 3090 Tuf, and it managed to bring down the vram temp to the same if not cooler than the bottom gpu. Cool little heat sink!Some people are saying it isnt flat, but test it on a flat surface first. I noticed that the metal backplate of my gpu isn't truly flat. But the heatsink I got was definitely flat. It did come with slight cosmetic imperfection, but it wasn't a huge deal tbh. You won't notice it if you orient it away from your sight.

I am using this on an Aims Power LiFePO4 70 amp @12V battery charger. Helps dissipate heat from the metal case and should prolog the life of the charger. Excellent cost to benefit value.

For the price I expected to have a peice of aluminum that wasn't scuffed up. I tried to sand it down gently and it appears that the underside is also extremely unleveled. I will be smoothing it out myself to make it 100% flat so it transfers heat efficiency. Im sure once i level out the surface it will work great but if you dont have the tools or skills to make it extremely flat i don't recommend this unless you use something to fill in those air gaps. I will be using this for a 1080ti graphics card backplate so having perfect contact is important.