http://insidehpc.com/2009/09/21/mellanox-releases-40-gigabit-converged-network-adapter/ HPC News Without the Noise for Supercomputing Professionals | insideHPC Sun, 19 May 2013 10:46:54 +0000 hourly 1 http://wordpress.org/?v=3.1.1 http://insidehpc.com/2009/09/21/mellanox-releases-40-gigabit-converged-network-adapter/#comment-191137 Latest gigabit network news – GigaBit network is slow – Spiceworks Community | Ann Arbor Computer Mon, 09 Nov 2009 07:40:51 +0000 http://insidehpc.com/?p=7174#comment-191137 [...] Mellanox Releases 40 Gigabit Converged Network Adapter | insideHPC.com [...] [...] Mellanox Releases 40 Gigabit Converged Network Adapter | insideHPC.com [...]

]]> http://insidehpc.com/2009/09/21/mellanox-releases-40-gigabit-converged-network-adapter/#comment-183950 John Leidel Tue, 22 Sep 2009 01:36:18 +0000 http://insidehpc.com/?p=7174#comment-183950 Patrick, you are indeed correct. In a previous life, I did quite a bit of testing with 10GbE when it was in a similar state. Even after garnering a machine with a bus capable of supporting the full bandwidth, we could only see ~96% of the performance [which at the time was wicked cool]. I think Mellanox has actually done the right thing by releasing early. Allow the community [especially OFED] to digest the new cards and work out any driver issues. Once the standards come up to speed, they'll be out of the gate running hard. Patrick, you are indeed correct. In a previous life, I did quite a bit of testing with 10GbE when it was in a similar state. Even after garnering a machine with a bus capable of supporting the full bandwidth, we could only see ~96% of the performance [which at the time was wicked cool]. I think Mellanox has actually done the right thing by releasing early. Allow the community [especially OFED] to digest the new cards and work out any driver issues. Once the standards come up to speed, they’ll be out of the gate running hard.

]]> http://insidehpc.com/2009/09/21/mellanox-releases-40-gigabit-converged-network-adapter/#comment-183796 Patrick Mon, 21 Sep 2009 15:19:59 +0000 http://insidehpc.com/?p=7174#comment-183796 Beyond the fact that the 40 Gb/s Ethernet spec is not finished yet (scheduled for June 2010), how do you run 40 Gb/s through a PCIe Gen2 x8 slot ? That's 32 Gb/s theoretical bandwidth, 26 Gb/s effective with 64 Bytes completions. So, it can't do 40 Gb/s but it's not like marketing cares about details like that... Beyond the fact that the 40 Gb/s Ethernet spec is not finished yet (scheduled for June 2010), how do you run 40 Gb/s through a PCIe Gen2 x8 slot ? That’s 32 Gb/s theoretical bandwidth, 26 Gb/s effective with 64 Bytes completions. So, it can’t do 40 Gb/s but it’s not like marketing cares about details like that…

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