Question LGA1851 with 2 x PCIe5.0 SSD support, without affecting GPU lanes.

[MnsoonMally]

I'm currently speccing-up a new build PC, both for Gaming, and for Production work.

I'm looking at all 3 ranges of technology, i9, Core Ultra, and AMD.

For Core Ultra, I'm looking to clarify identification of motherboards (if any) that fully support 2 x PCIe5.0 SSD's, WITHOUT, taking anything away from the GPU.

I've made an Excel spreadsheet with around the top dozen or so Motherboards currently available - but the clarity of which supports what SSD's without affecting the GPU is still somewhat unclear, even using the manuals.

I'm aware that 'you won't be able to tell the difference' between PCIe5.0 and PCIe4.0; but that's not my question - I'm looking specifically for Motherboards that support 2 x PCIe5.0 SSD's, without taking lanes from the GPU.....if any exist.

 

[faalin]

It would be more helpful if you listed the boards you are looking at. But from the three i looked at

MSI z890 tomahawk from CPu runs a PCIe 5.0 and 4.0
ROG Maximus z890 Extreme has to PCIe 5.0 slots, but if ether M.2_3 or M.2_4 are populated the PCIex16_1 will drop to 8x.
Asrock z890 Taichi Aqua same thing if second M.2 5.0 is installed the PCIex16 slot drops to 8x


I would have to say if those two $900+ boards Asus and Asrock cant do it then none of them will.

 

[MnsoonMally]

Only definitive answers, (if any), please.

If:

'I'm looking to clarify identification of motherboards (if any) that fully support 2 x PCIe5.0 SSD's, WITHOUT, taking anything away from the GPU.'

Isn't clear enough - then just don't reply.

 

[bill001g]

I am not so sure the motherboard is the issue. You have to look at the total PCIE lanes the CPU chip itself supports. If you really care about the speed you do not want to consider PCIE lanes provided by the chipset rather than the CPU itself.

So the new intel chips have 4 extra pcie 5 lanes. I have not seen if the chip supports splitting the these extra 4 into 2x2 or if it only as a single pcie5 x4. The previous generation intel chips had all 16 pcie5 lanes for the video card with the option to split it into 2x8 but no other options. So you had to give up 1/2 your pcie lanes to get any on a SSD slot.

AMD has more pcie5 lanes but I never bothered to see if it has the same limitation as intel but I suspect it does.