NVMe SSDs based on the M.2 form factor today come in several different lengths. These sizes range from 30mm to 110mm, although 30mm drives are rare and 110mm drives have until now been reserved for the server industry. They all have something in common the width of 22mm.
If they are not equal in width, problems could arise to fit the cases and motherboards, especially in laptops that need to optimize every last millimeter for space and cooling issues. It is therefore worth noting that PCI-SIG introduced a wider option for NVMe M.2 SSDs.
Soon there may be space issues with NVMe M.2 SSDs if they are PCie 5.0
This is a 25mm option, for M.2 SSDs, and that option has started to be available since the end of 2020. It turns out that the PCI-SIG has not mentioned it to anyone until now. The only reason anyone noticed this is because Gigabyte stated that their upcoming X670 and X670E motherboards were compatible with 25110 SSDs. Normally they would be compatible with 2280 or 22110 drives.
The first two numbers of the NVMe M.2 SSD format indicate the thickness, while the other two indicate the length. This is why this 3mm increase in thickness has been discovered.
3mm more width might not sound like much, but many M.2 drives look like they're going to have limited space, especially when it comes to passive components and power regulation. This would also be a preparation for PCIe 5.0 NVMe drives, where the host controller is expected to run hotter.
It looks like motherboard manufacturers are making room for this slightly larger M.2 form factor. They would also be looking for suitable cooling solutions for it. A big problem would be the most casual users, who could inadvertently purchase an M2 NVMe SSD that won't fit on the motherboard of their laptop or computer. PS5.
No SSD has been reported yet with that size increase. to do it, should have many warnings for users warning them that it may not fit into your motherboard.
Source: Tech Power Up
