Nvme 4.0 in 5.0 slot?

[KrzysiuM]

Will installing NVME 4. 0 in a 5. 0 slot slow pci express x16 to x8? I have an MSI X670E Tomahawk motherboard. I have an NVME drive installed like this, and will it affect the speed of the graphics card connector?

[r.linder]

Those SSDs only run up to x4 bandwidth, it'll just run as 4.0 x4

[Cathulhu]

It will not affect the videocard.
And as been said, the NVME slot will go to PCIe 4.0 instead.

[KrzysiuM]

Okay, cuz i’ve heard the rumour and was like… ummm rly?

[N4K]

PCEX.. it will always recognize the Video Card first. your NvmE hard drive.. it will never work on the pci express slot except with a PCXE adapter. The settings become automatic in the BIOS

[Cathulhu]

It's nonsense. They run completely separate, so they can also utilize different PCIe levels.
It's not like all your USB ports turn into USB 2.0 ports just because you connected one old USB device to it.

[Rumpelcrutchskin]

Waste of money buying those 5.0 NVME anyway, way too expensive for what you get compared to 4.0.

[N4K]

Any connection to PCIE NVEM can only be made via PCEX slot adapter .
An NVMe hard drive will never be connected directly to the PCIe controller slot. This will only be done through the corresponding adapter

[_I_]

each will run at its own limitations
pci-e 1.0 gpu will work and nvme 1.0 will work, not limiting each others lanes or pci-e rev

[Crashed]

Originally posted by Cathulhu:

It will not affect the videocard.
And as been said, the NVME slot will go to PCIe 4.0 instead.

From what it looks like, assuming you install a Ryzen 7000 series processor, there are 24 usable lanes of PCIe 5.0, so a motherboard may be able to provide both full bandwidth GPU and NVMe. Definitely check your motherboard specs however.

[Bad 💀 Motha]

Originally posted by Crashed:

Originally posted by Cathulhu:

It will not affect the videocard.
And as been said, the NVME slot will go to PCIe 4.0 instead.

From what it looks like, assuming you install a Ryzen 7000 series processor, there are 24 usable lanes of PCIe 5.0, so a motherboard may be able to provide both full bandwidth GPU and NVMe. Definitely check your motherboard specs however.

I'm so tired of going over this.

CPU is for GPU Lanes
Chipset is for everything else.

[Cathulhu]

And the NVME slow is not necessarily connected to the chipset. I have two on mine and the first is directly connected to the CPU, only the second is connected to the chipset. Still, neither would impact the videocard in any way if used in any way.

[Phénomènes Mystiques]

The beauty of PCIe is that it is backwards compatible.

[Bad 💀 Motha]

Yes usually only the first one would be supplied by the CPU.

Your Motherboard manual can explain better I would think for that particular board.

Anyways we've been over this many times on this very forum going all the way back to when NVME first came out and especially when boards/chipsets allowed for multiple NVME capable M2 slots. Having 2 or even 3 NVME SSDs doesn't take anything away from GPU Lanes. Especially since we aren't using SLI anymore.

[Phénomènes Mystiques]

I am awake now so let's take a peek at this motherboard manual:

Please be advised - If your M.2 SSD equips its own heatsink, please remove the M.2 plates or rubber cubes in the M.2 slots before installing M.2 SSD. Do not re-install the heatsinks supplied with your motherboard.

M2_1 [From CPU]

M2_2, M2_3, M2_4 slot (From X670 chipset)

PCI_E4 & M2_4 share the bandwidth. M2_4 will run at x2 speed when installing a device in the PCI_E4 slot.

[De Hollandse Ezel]

all m.2 slots are interchangable.

you can stick a PCIex5 card in

PCIex5 x 4
PCIex4 x 4
PCIex3 x 4
and even if they run at x2 or x1 speed and even if just runing at sata3 speed..

it will still work.
the only factor to see if it will fit is if the connector type (B, M or B+M)
and it's lenght.

it if fits.. it works.
the only dowside is it might run a bit slower that it's maximum speed.. as it can only run at the max speed of that moderboards connection to that m.2 slot.

PCIe 4 runs at 3000 Mbit per lane so x4 will run at 12000Mbit tops.. some sata 5 cards have a higher speed than that and thus will slow down a little to match it.

if you turn it around and stick an PCIe3 or Pcie4 card in an PCIe5 slot nothing happens.
those will already have speeds well below the maximum speed of that m.2 PCIe5x4 slot.