On Tue, 2010-02-16 at 14:17 -0700, YES NOPE9 wrote:
> I read an article about PCI 3.0.... i did not see a definition of GT/ 
> sec.
> What does it mean ?

First off I think you mean the PCIE 3.0 spec, not PCI.

Second, GT/s is "giga transfers for second". The reason for the
distinction is marketing.

PCIE Gen1 is 2.5GHz. Due to the use of 8/10b encoding the effective rate
is 2GT/s.

PCIE Gen2 is 5.0GHz. Due to the use of 8/10b encoding the effective rate
is 4GT/s.

PCIE Gen3 is 8.0GHz. Due to the use of 128/130b encoding the effective
rate is 8GT/s.

Essentially they want to emphasis that although the signally frequency
hasn't doubled over PCIE Gen2, the data transfer rate has.

TTYL

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