Hi, Andrea, We used a dual port CX-4 Intel NIC for the previous PAPER correlator X engines:
http://www.intel.com/content/dam/doc/product-brief/10-gigabit-cx4-dual-port-server-adapter-brief.pdf That NIC's PCIe interface only ran at 2.5 GT/s and x8 width, which works out to an 8/10B encoded data rate of 20 Gbps. This gives an unencoded (i.e. user) data rate of 16 Gbps, which is less than the 2 x 10 GbE ports could theoretically handle. Fortunately, we only needed 12.8 Gbps per card (6.4 Gbps per interface) so this limitation was not an issue for us and the card (and Linux driver) performed fine for our application. The E10G81GT2CX4 card you mention is also 2.5 GT/s x8 width, but the PCIe bus speed will not be a bottleneck since it has only a single 10 GbE port. Hope this helps, Dave On Oct 2, 2013, at 4:33 AM, Andrea Mattana wrote: > Hi Casperites, > > Does anybody have experience with this Intel card??? > > I would like to buy a new one but the two listed in the CASPER Wiki > (https://casper.berkeley.edu/wiki/Recommended_10_GbE_Hardware) are not > available > on local sellers. > > Do you have tested any other cards? > > Thanks to all. > > Andrea > > > -- > Andrea Mattana > > I.N.A.F. - Istituto di Radioastronomia > Radiotelescopi di Medicina > Via Fiorentina, 3513 - 40059 Medicina (Bo) > Tel. 051/6965834 Fax. 051/6965810 >
