On Wednesday 09 May 2012 10.20.47 Jeff Squyres wrote: ... > I don't have any QDR or FDR equipment -- what's the typical active_width for > QDR and FDR? > > QDR is 32000, so is that active_speed of 4 and active_width of 4? (8000 * 4 > = 32000)? > > FDR is 56000 (right?
Pretty much all IB is 4x to host. 4x QDR is 40 Gbps at link level => 8 Gbps data per link (8/10 coding) 4x FDR10 is 40 Gbps at link level => ~9.7 Gbps data per link (64/66 coding) 4x FDR is 56 Gbps at link level => ~13.5 Gbps data per link (64/66 coding) /Peter > I haven't kept up with IB specs since Cisco killed > IB...), so what are its active_speed and active_width values? -- -= Peter Kjellström -= National Supercomputer Centre
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