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The processor core itself operates at a frequency of 575 MHz for the GeForce 8800GTX and 500 MHz on GeForce 8800GTS. While the rest of the core runs at 575 MHz (or 500 MHz), the shader core has its own independent clock generator. GeForce 8800GTX runs at 1,350 MHz and the 8800GTS' clock speed is 1,200 MHz.
"Streaming Processor" is the term given to each shader core unit. The GeForce 8800GTX has 16 sets of eight streaming processors in a block. A total of 16 blocks makes up the entire number of 128 SPs. Like ATI's design in R580 and R580+ with its Pixel Shader units, Nvidia stated that more units can be added to future designs and some can be taken away. This can be seen in the implementation of 96 streaming processors in GeForce 8800GTS.