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Qlogic 8Gb adapter speed question

Trusted Contributor

Qlogic 8Gb adapter speed question

Bart had an adapter question:




A customer did send us a question regarding the speed of his Qlogic adapters in the BL460 gen 8 servers.

The Qlogic 2572 card is in mezz 1. This is a PCI-E –II (500MB/s per lane) (x4) Type A card. The Mezz slots in a BL460 Gen 8 are PCI-3 X16.

If you look at the picture you can see that the negociated PCI width is X4 with a negociated speed of only 5Gbits/s, the actual data rate is however 8Gbps.

How can we explain that the card runs at its highest speed and can deliver 2 x 8Gb/s FC traffic?

Or do we have a missmatch of Gb or GB? Or is the 5Gbit/s shown per PCI-E lane?






The answer from Cristoph:




What you see is the StarPower Feature from Qlogic:






Some Bios Versions had problems and used only one lane if you did not force the PCIE subsystem to Version 2.




But in your case you are ok.




Other comments or help?