Quote from: A on August 07, 2024, 21:07:44Because in real world, even PCI-E 4.0 for ssds is borderline useless.
Complete technical nonsense. They provide acceleration, but only where the system is balanced in terms of performance. Those. just in the latest Zen5, where the memory controller is capable of delivering 90-100GB/s - pci-e 4.0 x4 times are very profitable and just no more than 1/10 of the system memory bandwidth (and the lower the % of bandwidth, the better).
The problem is that there are STILL no energy-efficient mass-produced 4.0 SSDs on 3D TLC with a low-consumption DRAM buffer, and what's even worse is that in most laptop models, 2-sided SSDs will be used (if they even fit into the M.2 slot) in extremely unpleasant temperature conditions for NAND chips, especially taking into account the monstrous heating of current generation SSD controllers.
In fact, only Samsung on the market sells 2-4TB single-sided SSDs, but even they consume a monstrous 7-10W, which is unacceptable for laptops.
SSD consumption in a laptop should not exceed 2-3W at PEAK load.
In fact, today there are NO such controllers for mass production series 2-8TB with 3D TLC and DRAM buffer. And bufferless ones behave extremely poorly (especially the terrible models with QLC) as system disks, especially in a heavy mixed load of simultaneous read/write, which is typical for a system disk, which is also busy with other work besides the system load)
In fact, manufacturers of controllers and NAND chips are only now approaching energy efficiency that is acceptable for laptops in the pcie 4.0 x4 class with a dram buffer and on 3d tlc without the requirements of a radiator - the reason for this is the gradual slowdown of the "exhaust" from modern technical processes. The performance curve per 1W of consumption is becoming flatter and the cost of factories is rising exponentially due to the obvious failure in fundamental research around the world.