how Infiniband speed is related to processor speed

Posted by user223231 on Server Fault See other posts from Server Fault or by user223231
Published on 2014-06-01T08:40:25Z Indexed on 2014/06/01 21:34 UTC
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hpc

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infiniband

I have two exactly the same servers and very curious how to make Infiniband interconnection between them? Both servers' basic specs are:

CPU: 32GHz = 2x Intel Xeon X5650, 6 core, 2.66GHz and RAM: 24GB per server (edited)

How determine what speed of Infiniband will be enough for perfect interconnection? SDR, DDR, QDR or FDR?

My logic is 32Ghz = 32Gb/s and 40Gb one is enough, am I right or it is not that simple?

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