HP Workstation i2000 hp workstation i2000 owner's guide (a6037-90003) - Page 36

Memory Overview, DIMM installation sequence

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hp workstation i2000 owner's guide 2.1.2 Memory Overview Main memory resides on two- (2) add-in boards called Memory Expansion Cards (MECs). Each MEC contains sites for eight- (8) DIMMs and two- (2) power connectors for DC-DC converters. Each MEC is attached to the baseboard through a 300-pin connector. The memory controller supports PC100 registered SDRAM DIMMs. The memory sub-system can operate in two- (2) different modes. • Interleaved Mode: (two- [2] MECs installed). This configuration offers the highest performance by dividing the total system RAM across two- (2) MECs. This reduces the probability of wait states, thus increasing speed on sequential accesses. To operate in interleaved mode, BOTH MECs MUST BE USED WITH AT LEAST THE TOP FOUR- (4) DIMM SITES POPULATED ON EACH MEC. • Single-port Mode: (one- [1] MEC installed). The single MEC responds to all memory addresses. 2.1.3 DIMM installation sequence The DIMMs must be installed within groups of four- (4). Each board has eight- (8) DIMM sites. The top four- (4) DIMM sites form the top, or right, stack while the bottom four- (4) DIMM sites form the bottom, or left, stack (on each of the two- [2] boards). Refer to Figure 5. Installing i2000 RAM Accessory DIMMs Number of DIMMs Installed Memory Expansion Card A Memory Expansion Card B (4) DIMMs (8) DIMMs (12) DIMMs (16) DIMMs Figure 5. Memory Board Stacks 36

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hp workstation i2000 owner’s guide
36
2.1.2
Memory Overview
Main memory resides on two- (2) add-in boards called Memory Expansion Cards
(MECs).
Each MEC contains sites for eight- (8) DIMMs and two- (2) power connectors
for DC-DC converters.
Each MEC is attached to the baseboard through a 300-pin
connector.
The memory controller supports PC100 registered SDRAM DIMMs.
The
memory sub-system can operate in two- (2) different modes.
•
Interleaved Mode:
(two- [2] MECs installed).
This configuration offers the
highest performance by dividing the total system RAM across two- (2) MECs.
This reduces the probability of wait states, thus increasing speed on sequential
accesses.
To operate in interleaved mode,
BOTH MECs MUST BE USED WITH
AT LEAST THE TOP FOUR- (4) DIMM SITES POPULATED ON EACH MEC
.
•
Single-port Mode:
(one- [1] MEC installed).
The single MEC responds to all
memory addresses.
2.1.3
DIMM installation sequence
The DIMMs must be installed within groups of four- (4).
Each board has eight- (8) DIMM
sites.
The top four- (4) DIMM sites form the top, or right, stack while the bottom four- (4)
DIMM sites form the bottom, or left, stack (on each of the two- [2] boards).
Refer to
Figure 5.
Installing i2000 RAM Accessory DIMMs
(4) DIMMs
(12) DIMMs
(16) DIMMs
Memory Expansion
Card A
(8) DIMMs
Memory Expansion
Card B
Number of DIMMs
Installed
Figure 5.
Memory Board Stacks