Number o f IFP 1 1 1 1 1 Standard spare  PUs 2 2 2 2 2 Enabled Memory  sizes GB 512 - 7936 512 - 16128 512 - 24320 512 - 32512 512 - 40704 Flexible memory  sizes GB N/A 512 - 7936 512 - 16128 512 - 24320 512 - 32512 L1 cache per PU  (I/D) 128/128 KB 128/128 KB 128/128 KB 128/128 KB 128/128 KB L2 cache per PU 48/48 MB  (I/D) 48/48 MB  (I/D) 48/48 MB  (I/D) 48/48 MB  (I/D) 48/48 MB  (I/D) L3 shared cache  per PU chip 256 MB 256 MB 256 MB 256 MB 256 MB L4 shared cache  per drawer 960 MB 960 MB 960 MB 960 MB 960 MB Cycle time (ns) 0.192 0.192 0.192 0.192 0.192 Clock frequency 5.2 GHz 5.2 GHz 5.2 GHz 5.2 GHz 5.2 GHz Maximum number  of PCIe fanouts 12 24 36 48 60 PCIe Bandwidth 16 GBps 16 GBps 16 GBps 16 GBps 16 GBps Number of support  elements 2 2 2 2 2 External AC power 3-phase 3-phase 3-phase 3-phase 3-phase Internal Battery  Feature BPA only Optional Optional Optional Optional Optional Description Max34 Max71 Max108 Max145 Max190 Chapter 2. Central processor complex hardware components  87