Chapter 2. IBM eX5 technology 33Table 2-2 through Table 2-4 show the memory capacity and bandwidth increases that arepossible with MAX5 for the HX5, x3690 X5, and x3850 X5.Table 2-2 HX5 compared to HX5 with MAX5Table 2-3 x3690 X5 compared to x3690 X5 with MAX5Table 2-4 x3850 X5 compared to x3850 X5 with MAX5For more information about system-specific MAX5 installation options, see the followingsections: IBM System x3850 X5: “MAX5 memory” on page 79 IBM System x3690 X5: 4.8.3, “MAX5 memory” on page 136 IBM BladeCenter HX5: “MAX5 memory population order” on page 1982.5 ScalabilityThe architecture of the eX5 servers permits system scaling of up to two nodes on HX5 andx3850 X5. The architecture also supports memory scaling. Figure 2-12 shows these types ofscaling.Figure 2-12 Types of scaling with eX5 systemsThe x3850 X5 and HX5 both support 2-node system scaling or memory scaling. Thex3690 X5 supports memory scaling only.HX5 HX5 with MAX5Memory bandwidth 16 DDR3 channels at 978 MHz 16 DDR3 channels at 978 MHz+ 12 DDR3 channels at 1066 MHzMemory capacity 128 GB using 8 GB DIMMs 320 GB using 8 GB DIMMsx3690 X5 x3690 with MAX5Memory bandwidth 32 DDR3 channels at 1066 MHz aa. Must install optional mezzanine board64 DDR3 channels at 1066 MHzMemory capacity 512 GB using 16 GB DIMMs 1 TB using 16 GB DIMMsx3850 X5 x3850 X5 with MAX5Memory bandwidth 32 DDR3 channels at 1066 MHz 48 DDR3 channels at 1066 MHzMemory capacity 1 TB using 16 GB DIMMs 1.5 TB using 16 GB DIMMsMemory scaling System scalingServerMAX5QPI ScalingServerQPI ScalingServer
