Memory Bandwidth - IBM Power 720 Overview

P1-C15-C1
P1-C15-C2
P1-C15-C3
P1-C1-C4
Memory Card #4 – P1-C15
P1-C15-C7
P1-C15-C8
P1-C15-C9
P1-C15-C10
POWER7+
P1-C10
P1-C16-C1
P1-C16-C2
P1-C16-C3
P1-C16-C4
Memory Card #3 – P1-C16
P1-C16-C7
P1-C16-C8
P1-C16-C9
P1-C16-C10
Figure 2-14 Memory DIMM installation sequence for two processors with four riser cards

2.3.3 Memory bandwidth

The POWER7+ processor has exceptional cache, memory, and interconnect bandwidths.
Table 2-7 shows the maximum bandwidth estimates for the Power 720 and Power 740
systems.
Table 2-7 Power 720 and Power 740 processor and memory bandwidth estimates
Memory
L1 (data) cache
L2 cache
L3 cache
System memory
Pair 4
Pair 12
Pair 4
Pair 12
Pair 16
Pair 8
Pair 16
Pair 8
POWER7+
P1-C11
Pair 2
Pair 10
Pair 2
Pair 10
Pair 14
Pair 6
Pair 14
Pair 6
Power 720
3.612 GHz processor card
173.376 GBps
173.376 GBps
115.584 GBps
68.224 GBps
Chapter 2. Architecture and technical overview
P1-C17-C1 Pair 3
P1-C17-C2 Pair 11
P1-C17-C3 Pair 3
P1-C17-C4
Pair 11
Memory Card #2 – P1-C17
P1-C17-C7 Pair 15
P1-C17-C8 Pair 7
P1-C17-C9 Pair 15
P1-C17-C10 Pair 7
P1-C18-C1
Pair 1
P1-C18-C2 Pair 9
P1-C18-C3 Pair 1
P1-C18-C4 Pair 9
Memory Card #1 – P1-C18
Pair 13
P1-C18-C7
P1-C18-C8 Pair 5
P1-C18-C9 Pair 13
P1-C18-C10 Pair 5
Power 740
4.284 GHz processor card
205.632 GBps
205.632 GBps
137.088 GBps
68.224 GBps (one socket)
136.448 GBps (dual sockets)
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