hp workstation i2000 owner’s guide
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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
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