What is the meaning of the SP unit of the graphics card?

Also known as the stream processor unit, which directly affects the performance of the display core, such as 9600GSO G92 core stream processor number of 96, 9600GT only 64, so the latter can only rely on the increase in specifications, 512M memory and 256-bit width can be in the performance of the former suppression. The difference between the different display cores lies in the number of stream processors, texture units, transistor counts, and manufacturing processes.