I226-V相比I225-V有什么改进么

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Intel Ethernet Controller I226 Enhancements

The I226 retains the same board design compatibility of the I225, as well as utilizing the same driver code base. But the I226 adds some enhancements, most notably:

Improved Bit Error Rate (BER)
Better packet performance; especially at the longest cable
lengths.

Reduced Active Power
Better packet performance; especially at the longest cable
lengths