Thanks for this!
I stumbled into a weird gap in the market, last year. I took advantage of the SSD price crash and snapped up a Samsung PM9A3 M.2 drive, which seems to be one of the last M.2 form factor server-grade drives on the market. In fact, even Samsung seems to have discontinued the M.2 version, which is no longer listed on the product page.
PM9A3 with PCIe® Gen4 features fast speeds and supports E1.S, U.2, and M.2 form factors. View the new generation of performance for powerful data centers.
semiconductor.samsung.com
Anyway, it's a double-sided 110 mm drive I wanted to mount in a motherboard with a 110 mm slot and
no integrated M.2 heatsink. Worse yet, that drive runs a bit hot. This is a server board (AM4 socket), but I don't have (nor do I want) a high-airflow server case for it. So, I sought a double-sided heatsink that would provide some cooling across the entire 110 mm area. The only cooler I found was on ebay, direct shipped from China:
As I hoped, it does indeed contact all the chips on both sides. The bottom being rather thin, I do wish it were made of copper, but I'm sure it's better than nothing and I don't use it for anything data-intensive, anyhow. It's admittedly overkill for an OS drive, but I'm hoping it proves to be reliable.
I did see a couple other 110 mm heatsinks on the market. However, upon close examination, they didn't have full coverage of the backside (I'd guess for compatibility with 80 mm drives). If anyone is aware of other 110 mm options
with full coverage on both sides, please let us know!