IBM pSeries 610 model 6C1 Technical Overview And Introduction

Also see for 60: Technical reference User guide Introduction and planning guide

10 pSeries 610 Models 6C1 and 6E1 Technical Overview and Introduction2.1 Processor and cacheThe IBM® ^ ™ pSeries™ 610 Models 6C1 and 6E1 have two processor card slotsand can accommodate three different processor cards, a 1-way 333 MHz, a 1-way 375 MHz,or a 1-way 450 MHz. Note that slot 1 must have a processor card installed for normaloperation.If your system unit uses two processor cards, both processor cards must be of the sameclock speed.2.1.1 L1 and L2 cacheModels 6C1 and 6E1 use a 64 KB data and a 32 KB instruction 128-way set associative L1cache. The size of both data and instruction cache reduces the number of cache misses,results in more cache hits, and maximizes performance. Both data and instruction cache areparity protected.The L1 cache is effectively supplemented by a 4 MB 4-way set associative L2 cache, which islocated on the 333 MHz and 375 MHz processor cards (8 MB for the 450 MHz processorcard). The speed of the L2 cache is dependent upon the processor speed. The POWER3-IIuses a private 32-byte L2 cache bus, operated at 166.5 MHz with the 333 MHz processor (1:2ratio) 250 MHz with the 375 MHz processor card (2:3 ratio), and 225 MHz with the 450 MHzprocessor card (1:2 ratio). Both the enhanced clock speed and 4-way set associative L2cache improve cache efficiency. The L2 controller uses a least recently used (LRU) algorithmto avoid replacing recently used cache data and a set prediction mechanism that helpsreduce L2 cache misses.The L2 cache uses a direct mapped cache methodology. There is a dedicated externalinterface to the L2 cache not shared with the 6XX bus. This allows concurrent access to boththe L2 cache and the 6XX bus.2.1.2 POWER3-II architectureThe POWER3-II processor offers technical leadership for floating point applications andhigh-performance numeric intensive computing (NIC) workstations by integrating twofloating-point, three fixed-point, and two load/store execution units in a single 64-bit POWER3implementation. Table 2-1 lists some of the technical features of the POWER3-II processors.Table 2-1 Technical features of POWER3-IINote: Installing a processor card into your system unit may require updating the firmware.A diskette or CD-ROM is included with your new processor card if that is required. Checkalso the following Web page for the latest available firmware:http://www.rs6000.ibm.com/support/micro/Description POWER3-IIChip Die Size 163 mm 2Transistors 23 millionPower Avg/Max 23W/31W@333 MHz,26W/33W@375 MHz,31W/42W@450 MHzCMOS Technology 7S, 6 layers metal, copper interconnectLithography 0.22 μm