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

I wouldn’t exactly call these large, but they get the job done. I placed one on top of a docking station that didn’t have the best heat dissipation. I know this after an hour or two that the docking station was lower in heat, which made it less vulnerable for overheating and malfunctioning. I placed another on top of a external hard drive. Because the drive is made from plastic, I have yet to know the difference, though I’m sure the aluminum is absorbing something. I like how they’re slim and they can be combined together if needed.

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.

The packaging was perfectly intact, so damage to this heatsink was not from shipping. Not worth my time to return, but disappointing. Edit: the seller reached out to me and offered refund or replacement. I agreed on replacement and they sent a new undamaged heatsink right away. Good customer service.

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

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.

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.

Worked well for my usage, put it on a switch that was heating too much and it seems to help cooling it.