Nvidia's GTX 200 series has been around for 5 months. The GT200 core that powers the GTX 200 series cards is a beast of a core, the largest core produced by TMSC weighing at 575 mm^2 with 1.4 billion transistors. The
GTX 280 uses a fully functional core with 10 of 10 SIMT (single instruction, multi-threaded) units while the original GTX 260 used a GT200 core with 8 of 10 SIMT cores enabled. On September 16th, 2008
Nvidia released a new GTX 260 with 9 of 10 SIMT cores enabled, providing a theoretical 12% performance boost.
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