Comparing The X3850 X5 To The X3850 M2 - IBM System x3850 X5 Implementation Manual

Power-on
LED
Locate
LED
System
error
LED
Figure 3-5 MAX5 connectors and LEDs
Figure 3-6 shows the internals of the MAX5 including the IBM EXA chip, which acts as the
interface to the QPI links from the x3850 X5.
IBM EXA chip
Power supply
connectors
Figure 3-6 MAX5 memory expansion unit internals
For an in-depth look at the MAX5 offering, see 3.5, "MAX5" on page 68.

3.1.4 Comparing the x3850 X5 to the x3850 M2

Table 3-1 on page 62 shows a high-level comparison between the eX4-based x3850 M2 and
the eX5-based x3850 X5.
EXA EXA EXA QPI
port 1 port 2 port 3 port 1
EXA port 1
link LED
EXA port 2
link LED
EXA port 3
link LED
Intel Scalable
Memory buffers
QPI QPI QPI
port 2 port 3 port 4
32 DIMM sockets
Chapter 3. IBM System x3850 X5 and x3950 X5
Power
connectors
AC LED (green)
DC LED (green)
Power supply
fault (error) LED
Five hot-swap
fans
MAX5 slides
out from the
front
61