Aluminum Heat Sink Heatsink Module Cooler Fin for High Power Transistor Semiconductor Devices with 26 Pieces Fins 150mmx 80mm x 27mm

NVidia 3090 FE has pretty bad cooling design. While it works great for GPU, NVidia totally forgot that memory chips also tend to heat up and they heat up real bad if you mine ETH. So, I ended up replacing stock radiator with Corsair waterblock and added this radiator to the backplate. The memory and GPU are much cooler now and the overclocking capabilities for memory are much much better while staying cooler than before.Do not forget to put 92mm fan on top of this radiator as passive cooling is still not enough.

Decent heat sink.