Dear Barney,
PCIe cards are 1x because the chips are all wired for
1x. Intel has a marketing plan. Its not to use low-end
chips for high-end operations. Intel is just going to
cannibalized their own business by putting out higher
performance low-end chips.
really?
the 1 port server chip use only 1 lane
the 2 port server chip use only
sorry, forgotten to finish this part:
The 1 and 2 port intel server gbit chipset have a 4x lanes pci-e
conection.
The 1 port card only use 1x lane.
The 2 port card use 4x lanes.
The 4 port card use 4x lanes.
pci-e bus speeds:
http://www.s-t-e.de/index.html?http%3A//www.s-t-e.de/content/Articles/Articles_08b.html
(sorry, only in german)
http://www.s-t-e.de/content/Articles/images/Articles_08/PCIe_EffVSPay_f24_sml.gif
there you see the efficency with different payloads.
minimal ethernet packet size of 64 byte has a efficency of 0.4
with small packets you will be able to achieve 800mbits, whats not bad.
perhaps with the 2 port-cards it would be better, but I think, the system
io of the processor will start limiting.
Kind regards,
Ingo Flaschberger
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