Originally posted by ChrisRamseyer
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GPU flat backplane and the CPU air coolers flat wall can be both sides of the M.2 slot so creating a low airflow tunnel. AIO can be worse because they have no fan and the wall of the AIO block can also create a no airflow tunnel.. Most cases like test bench don't have any fan lined up with the tunnel that the first M.2 is in. Yes adding intake fans does not fix problem when the air of the intake fan is either been sucked away by the GPU or sucked away by the CPU so not making it to where the M.2 is.
From what you wrote if I am reading this right we can expect the PCIe 4.0 to be throttled as well in many setups due to lack of airflow so end users not getting the performance they really paid for. Yes one of your team did note in 2022 that he thought active cooling for PCIe 5.0 would be required due to the faster ramp up. I think he is absolutely correct.
I think ChrisRamseyer with M.2 SSD we might have cross the same point GPU crossed a long time ago where they went from being passively cooled to active cooling. Of course current M.2 SSD don't have any means to directly control fan speed.
To be real in the specifications with this SSD there is no min airflow or thermal heat removal statement for best performance same problem exists with the PCIe 4.0 SSD amd before. So how was reviewers to know they should have been checking airflow.
Also have another problem if you start throttling the PCIe 5.0 ssd in the controller how much before the result is going to be no different to the user installing a cheaper PCIe 4.0 SSD in the same poor cooling location.
2LFM might seam to you as not a lot. Inside PC computer cases at the first M.2 slot location this is a massive amount due to the amount of airflow obstructions that can be in the way of airflow. Yes to the point of requiring either ducting or fan intentionally pointed in that direction to get 2LFM at the first M.2 because of the obstructions.
Tech-power up setup and the test bench setups are absolutely not the worst. Some ITX motherboards have the first M.2 mounted on the underside motherboard getting 0.2 LFM(yes 1/10) there would be doing well and depending on location in ITX case thermal pad to the motherboard tray may not help either. I think this kind of explains why some IPX builds have been PCIe 3.0 ssd.
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