HP Kayak XU 04xx HP Kayak XU PC Workstation Technical Reference Manual Hardwar - Page 25

2 System Board Devices on the Processor-Local Bus Processor Frequency1 Switch Number 1 233 MHz UP2 266 MHz UP 300 MHz UP 333 MHz UP 366 MHz UP 2 DOWN DOWN DOWN DOWN DOWN 3 DOWN UP UP UP UP 4 UP DOWN DOWN UP UP 5 UP DOWN UP DOWN UP 1.The PCI bus frequency is 33 MHz and the ISA bus frequency is 8.33 MHz. 2.UP=OFF, DOWN=ON The computer may execute erratically, if at all, or may overheat, if it is configured to operate at a higher processor speed than the processor is capable of supporting. This can cause damage to the computer. Setting the switches to operate at a slower speed than the processor is capable of supporting can still cause erratic behavior in some cases, and would reduce the instruction throughput in others. Cache Memory There are two types of integrated circuits sealed within a single Pentium II package. One of these constitutes the Level-2 (L2) cache memory; the other is the processor, which itself includes two banks of Level-1 (L1) cache memory. The L1 cache memory has a total capacity of 32KB (16 KB data, 16 KB instruction). The L2 cache memory has a capacity 512 KB, and is composed of four-way set-associative static RAM. Data is stored in lines of 32-bytes (256 bits). Thus two consecutive 128-bit transfers with the main memory are involved for each transaction. The amount of cache memory is set by Intel at the time of manufacture, so cannot be changed. 17