不同的架构。一般来说，新架构比以前的架构运行CUDA程序和图形更快。但请注意，上一代中的高端卡可能比后代中的低端卡快。

从CUDA C编程指南（v6。 0）：

What does compute capability 2.0 add over 1.3, 2.1 over 2.0, and 3.0 over 2.1?

The Compute Capabilities designate different architectures. In general, newer architectures run both CUDA programs and graphics faster than previous architectures. Note, though, that a high end card in a previous generation may be faster than a lower end card in the generation after.

From the CUDA C Programming Guide (v6.0):