Technologies for HP ProLiant 100-series G5 (Generation 5) servers, 2nd edition

AMD Opteron™ processors
AMD Opteron multi-core processors include Direct Connect™ and HyperTransport™ technology. Their
method of parallel, point-to-point interconnectivity provides scalable bandwidth among the processor,
I/O subsystem, and chipset.
2
Opteron processors have an integrated memory controller that directly
supports PC2-6400 (DDR2-800) DIMMs. The AMD architecture replaces the FSB with direct
communication links between each CPU, between CPU and I/O, and between CPU and memory.
Select HP ProLiant 100-series servers support AMD Opteron quad-core processors.
The dual-core AMD Opteron 1000 and 2200 series processors include a dedicated 1-MB L2 cache
per core (Figure 3A). Second-generation Opteron 2200-series processors run at up to 3.0 GHz. The
quad-core AMD Opteron 2300 processor (Figure 3B) includes a dedicated 512-KB L2 cache for each
core and a 2-MB L3 cache shared by all cores. The quad-core AMD Opteron also uses Dual Dynamic
Power Management™ architecture, a design that separates the core and memory power planes.
Figure 3. Block diagrams of dual-core and quad-core AMD Opteron processors
A
. Dual-Core architecture
B. Qu
ad-Core architecture
CPU0
512
K
B
L2 Cache
2 MB L3 Cache
System Request I/F
Crossbar Switch
DDR2 Memor
y
Cntlr
Hypertransport I/F
72-bit
72-bit
Link 1
Link 2
Link 3
CPU1
512
K
B
L2 Cache
CPU2
512
K
B
L2 Cache
CPU3
512
K
B
L2 Cache
CPU0
System Request I/F
Crossbar Switch
DDR2
Memory Cntlr
Hypertransport
I/F
72-bit
72-bit
Link 1
Link 2 Link 3
1 MB
L2 Cache
CPU1
1 MB
L2 Cache
ProLiant 1
00-series G5 servers that support the Opteron processor use a split-plane motherboard that
separates the voltage feeds to the CPU core and the DDR2 memory controller. This split-plane design
allows granular power management of the Opteron processor to reduce energy consumption while
increasing performance.
2
For additional information about AMD processors, see the HP technology brief titled “AMD Opteron™ and
Intel® Xeon® x86 processors in industry-standard servers” at
http://
h20000.www2.hp.com/bc/docs/support/SupportManual/C02731435/C02731435.pdf
4