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First Bluetooth, then USB and now PCI Express. It's clearly the era of
version 3.0, and given that the PCI Express specification has been
humming along at 2.0 speeds for over two years now, we'd say an update
was definitely due. Thankfully, the PCI-SIG has announced the
availability of the PCIe Base 3.0 specification to its members today,
and the highlights are certainly notable. There's a new 128b/130b
encoding scheme and a data rate of 8 gigatransfers per second (GT/s),
doubling the interconnect bandwidth over the PCIe 2.0 specification.
And since we're sure you're fretting it, we'll go ahead and affirm
that it maintains backward compatibility with previous PCIe
architectures. We're also told that based on this data rate expansion,
"it is possible for products designed to the PCIe 3.0 architecture to
achieve bandwidth near 1 gigabyte per second (GB/s) in one direction
on a single-lane (x1) configuration and scale to an aggregate
approaching 32 GB/s on a sixteen-lane (x16) configuration." A lot of
technobabble, sure, but one thing's for sure: your next graphics card
is bound to murder your current one if paired with a PCIe 3.0
motherboard.
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