CSCE101 – 4.2, 4.3 October 17, 2006

Power Supply Surge Protector –protects from power spikes which ruin hardware. Voltage Regulator – protects from insufficient power which ruins data. UPS – uninterruptible power supply.

Motherboard (cont.) Expansion vs. upgrading Moore’s Law – number of transistors that can be packed onto a chip doubles every 18 months

More on CPUs Chipset Intel chips – Pentium series, Celeron, Xeon, Itanium AMD – Athlon, K6 series Apple changeover from Motorola to Intel Multicore processors

More on CPUs Hertz, MIPS, flops Intel Pentium EE 840 Dual Core – 3.2 GHZ (each core), 230 million transistors Motorola PowerPC 7400 (G4) – MHZ, 10.5 million

More on CPU Control Unit, ALU, Registers, Buses Logic - >, =, Word Size Instruction Cycle – –Fetch –Decode –Execute –Store Pipelining

Other Methods of Speeding up Processing Interleaving – producing a continuous flow of data from multiple memory banks Bursting – plays on probabilities… retrieval of a block of data or a block of instructions into the cache. Superscalar Architecture – Multicore processors, hyperthreading