Chiming in to say that you don't need an SSD heatsink in the PS5.
First point, All SSD are designed to throttle, to keep them from heat damage. Because of this, you can't really damage an SSD from heat, in typical usage. And most of them manage throttling in such a way that the performance is still good. There aren't a lot of drives which practically come to a halt, while throttling. There are some, but not many.
With SSDs,
writing data heats up the drive much more than reading, does. And the vast majority of your PS5 usage, is
reading data.
Toms hardware found that in a PS5: Western Digital Black SN850, and a Samsung 980 Pro, with 1TB capacity-----they didn't run into any tangible throttling or performance issues while
writing data, even with no heatsink and the PS5's SSD port cover installed (with the cover installed, there is little or no airflow).
And even if the drives would ever throttle in this configuration, it would only ever be during a long, sustained write. Which you wont be doing very often. But it may not even be possible to have a long enough write in a PS5, for it to really matter. As copying the entire internal PS5 drive, to one of these secondary drives, wouldn't take more than a couple of minutes on a top speed drive. and maybe 5 minutes on a mid-speed drive. And likewise, "installing" a game (if it even needs to be completely downloaded and then explicitly "installed") would only take a couple of minutes. Its hardly long enough for throttling to happen during a
write. And if it did, you most likely wouldn't even notice.
The majority of PS5 usage, is
reading data from the drives. This generally does not heat up the drives enough to even be close to throttling. And in that sense, even the worst case scenario of the drives being run with no heatsink, with the cover installed, would never lead to performance issues while gaming.
and if you simply use the drives without the PS5's port cover for the NVME expansion port----you get airflow from the CPU fan and the drives run well within thermal specs, even while doing heavy writes.
Its a good article:
https://www.tomshardware.com/features/ps5-ssd-upgrade-temperature-testing
For another recently popular drive due to price, S70 blade, Techpowerup found that while the drive runs hot and does throttle (in a PC with no airflow) during heavy sustained writes,
even with the official heatsink: its not enough to matter, as it behaves well while throttling and manages its performance in a way which you wouldn't generally notice. And to be clear, the S70 with no airflow, throttles with its official heatsink and without it. the performance difference between the two, while throttling, was found to be negligeble.
And airflow from a fan fixes the throttling, with or without heatsink.
https://www.techpowerup.com/review/adata-xpg-gammix-s70-blade-2-tb/7.html
The new
ADATA XPG Atom 50 basically never throttles without a heatsink. and performs just shy of the top end drives.
In my own PS5, I use this SSD, with no heatsink:
With the Spatium Series, MSI is entering the highly competitive SSD market. The Spatium M470 uses a Phison E16 controller paired with 96-layer TLC flash from Toshiba, which makes it one of the fastest drives we ever tested, also thanks to support for the PCI-Express 4.0 interface.
www.techpowerup.com
Indeed, some SSD don't behave well while throttling and come to an effective halt when they throttle. Buuuut, I've scarcely seen one which throttles with airflow. Leave the port cover off in the PS5 and you have airflow. And most of the time, you'll be
reading, anyway. So even a poorly behaved drive shouldn't be in danger of throttling, the majority of the time, if ever. If you leave off the port cover.
So, kind of the through line here is
A. you don't really need an SSD heatsink in the PS5
B. heatsinks cost extra and its often enough to eat up what would otherwise be a good discount on an SSD. $10 - $30. Sometimes the official heatsinks for a particular SSD model can command even more of a premium than that.
C. Running an SSD without a heatsink for general use, is absolutely ok. Especially if you have airflow. The only situation which would really command a heatsink on an SSD, is someone whom is frequently doing long writes or long combination read/write off the same drive. So, someone whom is doing a lot of video work or just generally moving around large volumes of files, constantly.