THERE IS NO SUCH THING AS 32x
It's PCIE 2.0 x16 and PCIE 1.0/1.1 (x16).
PCIE 2.0 lanes (16 lanes) carry UP TO twice as much data, that us why it's "2x faster".
And what CAGG just stated above is the key reason why PCI-E 2.0 is backwords compatible with PCI-E 16x, they use the same amount of lanes, the only major difference (Greatly simplified, of course, and not the only difference, per-say) is the bandwidth provided by the increase of the lane's speeds...
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