PCIe gen 5 m2 drives but no true gen 5 sockets ?

[digitaldreams]

Just noticed several gen5 m2 drives on sale now so looked at my motherboard, good old gen4.

Looking at the latest Z790 Asus motherboards on sale at OC and the most expensive is gen4 too, needing a 'Rog Hyper m2' card to achieve gen5 speeds !? (yet it is plugged into a pcie4 slot ???). And to top it all OC only sell the old pcie 3.0 card ??

Am I missing something here ?

 

[Tetras]

Am I missing something here ?

Intel 12th and 13th gen don't have any spare PCI-E 5.0 lanes, they can only support the graphics card with 16 lanes, so if they have PCI-E 5.0 SSD they have to steal 8 lanes (because the CPU can only split the lanes into 8 and 8, not 12 and 4).

Ryzen 7000 CPUs have 4 lanes for the M.2 and 4 general purpose which can be used for a second M.2, so there are Ryzen boards which support 2x PCI-E 5.0 M.2 slots and no impact on the graphics card.

 

[Mcnumpty2323]

For what it's worth
Running your gpu at x8
Barely notice the difference anyway
Got 5 x m2 drives
So the bifurcation makes gpu x8
I don't notice any difference from x16
Probably a couple of %
Maybe measurable in benchmarks
But in real life use I can't tell any difference

 

[digitaldreams]

For what it's worth
Running your gpu at x8
Barely notice the difference anyway
Got 5 x m2 drives
So the bifurcation makes gpu x8
I don't notice any difference from x16
Probably a couple of %
Maybe measurable in benchmarks
But in real life use I can't tell any difference

Yes doubtful the difference would be noticed in most real world cases.... Strangely noticed a moderate increase of my current m2 read/write speed by upgrading from a 12900ks to 13900kf though !