I think it will run at pcie 2.0 x1Well it's not fully clear. Actually : a 1 port 10gb nic card running pcie2.0 x4 , if i plug into a pcie3.0 x1 : Will this work at about 5gb speed ? But work without error, just a bit slower.. ?
thanks
I think it will run at pcie 2.0 x1Well it's not fully clear. Actually : a 1 port 10gb nic card running pcie2.0 x4 , if i plug into a pcie3.0 x1 : Will this work at about 5gb speed ? But work without error, just a bit slower.. ?
thanks
A ConnectX-2 card runs at pcie 2.0 and will not run at pcie 3.0 even if you put it in a 3.0 slot. It will also run at x1 only if the slot is x1 electrical. So putting a pcie 2.0 x4 or x8 card in a pcie 3.0 x1 slot will run at pcie 2.0 x1. Severely limiting the bandwidth to just 500 MB/s. Someone correct me if I'm wrongI guess a Mellanox 2 dual nic into a pcie3.0 x1 will most likely run at 4gb each. But those mellanox are pcie2x8 card... so anyone had tested ??
A pci2x4 into a pci3x1 should give 8gb on 1 port.
That's correct.A ConnectX-2 card runs at pcie 2.0 and will not run at pcie 3.0 even if you put it in a 3.0 slot. It will also run at x1 only if the slot is x1 electrical. So putting a pcie 2.0 x4 or x8 card in a pcie 3.0 x1 slot will run at pcie 2.0 x1. Severely limiting the bandwidth to just 500 MB/s. Someone correct me if I'm wrong
When your workload can saturate 2x 10gbit links, then yes.Will the slot become a bottleneck?
Is anyone able to confirm whether the Solarflare SFN6122F will work in a pcie 2.0 x4 (physical x8)? I have read the thread and am pretty certain it should, but the sfuserguide v4.12.0 is throwing me off with the following: "8 lanes Gen2 (5.0GT/s), x8 edge connector (usable in x8 and x16 slots), 127 SR‐IOV virtual functions per port."
Is the "usable" here electric or physical?
MY guess: 10GBE SFP+ based cards share the design with QSFP+ based cards, while 10GBaseT doesn't have faster variants that require a different pcb design.I was wondering too why there would be T2 (10G RJ45) cards available in PCIe gen3 x4 available and none as DA2 (SFP+)
Now however, both Mellanox ConnectX-3 and Intel X710-DA2 are available as PCIe gen3 8x.
Thanks for the hint Tommy Blom, however we were discussing any potential dual port cards.Have à look at Mellanox ConnectX-3 MCX311A-XCAT EN 10G Ethernet SFP+
1 port pcie 3.0 x4.