GT200 board CAD model leaked, possibly from the HSF manufacturer (cough
Coolermaster cough...):
http://forums.vr-zone.com/showthread.php?t=274391

Doesn't look too far fetched from the G80/G92 boards, though the die size is
considerably larger (or nVidia finally put a heatspreader on the chip
package). The offset memory chip locations on the front and back of the card
supposedly indicate a 512-bit memory interface.

If you have a solid modeling program like SolidWorks or Pro/E, here's the
STEP file:
http://www.mediafire.com/?gem3dcyjd9y

--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."