Question do I have enough PCIe lanes?

[sspeed]

I am using an Asrock B660M-ITX/ac motherboard.

I have 4 SATA SSDs, 1 NVMe SSD. Nic is Intel(R) 82599 10 Gigabit Dual Port. Also has an onboard Intel I219-V nic. It's a homelab esxi.

From my understanding. the 82559 nic takes 8 chipset PCIe lanes. What gen though? Each SATA takes 1. But what gen? NVMe has 4 to the CPU. I assume the 82559 takes gen3 lanes and the SATA as well?

Either way, I seem to be limited by the B660 with 6 PCIe 4.0 ports and 8 PCIe 3.0 ports? Between the 4 SATA SSDs and 82559 nic I am using 12 Gen3 PCIe lanes? Just wondering if I should look for a used H670 or Z690 board? Or do the 6 PCIe 4.0 lanes function as 3.0 when nothing else is on them?

 

[SkyNetRising]

From my understanding. the 82559 nic takes 8 chipset PCIe lanes. What gen though?

82559 nic works in PCIE 2.0 mode.

Each SATA takes 1. But what gen?

No. Sata goes through chipset.

NVMe has 4 to the CPU.

Yes.

I assume the 82559 takes gen3 lanes and the SATA as well?

No. PCIE slot is connected to cpu PCIE lanes. But 82559 works in PCIE 2.0 mode.

Either way, I seem to be limited by the B660 with 6 PCIe 4.0 ports and 8 PCIe 3.0 ports?

What? Please elaborate.

 

[sspeed]

Apologies, excuse my ignorance. I was going by this and trying to make heads or tails.

https://www.tomshardware.com/news/intel-h670-b660-h610-motherboard-roundup

It shows 6 PCIe 4.0 lanes and 8 PCIe 3.0 lanes. I don't see any PCIe 2.0? Those lanes are just for the chipset? And 82559 goes to the CPU, so chipset lanes shouldn't matter? i7-12700 if that matters.

 

[SkyNetRising]

It shows 6 PCIe 4.0 lanes and 8 PCIe 3.0 lanes. I don't see any PCIe 2.0? Those lanes are just for the chipset? And 82559 goes to the CPU, so chipset lanes shouldn't matter?

I don't understand your concern.
What is not working for you?

Intel(R) 82599 is PCIE 2.0 device in PCIE 4.0 slot. It works in backwards compatible PCIE 2.0 mode.

 

[sspeed]

I added a Gen4 NVMe, expecting it to be snappier. ESXi backups to a Synology 1817+ are actually taking longer than when the VMs were on a SATA SSD. Can't figure out why, so wondering if ran out of lanes.

 

[SkyNetRising]

I added a Gen4 NVMe, expecting it to be snappier.

What model M.2 drive?

 

[sspeed]

WD Black SN850X. CrystalDiskMark is showing expected performance, but backups over the 10gbit wire are definitely slower, about 20 min slower on a 2.5hr backup.

 

[SkyNetRising]

At what data rate are backups happening?

You'll be limited either to sata speed or network speed.