HP DC7800 - Manual (Page 178)

Memory
The computer comes with double data rate 2 synchronous dynamic random access memory (DDR2-
SDRAM) small outline dual inline memory modules (SODIMMs).
SODIMMs
The memory sockets on the system board can be populated with up to two industry-standard SODIMMs.
These memory sockets are populated with at least one preinstalled SODIMM. To achieve the maximum
memory support, you can populate the system board with up to 4 GB of memory.
DDR2-SDRAM SODIMMs
For proper system operation, the SODIMMs must be:
● industry-standard 200-pin
● unbuffered PC2-5300 667 MHz-compliant or PC2-6400 800 MHz-compliant
● 1.8 volt DDR2-SDRAM SODIMMs
The DDR2-SDRAM SODIMMs must also:
● support CAS latency 5 DDR2 667 MHz (5-5-5 timing) and CAS latency 6 DDR2 800 MHz (6-6-6
timing)
● contain the mandatory Joint Electronic Device Engineering Council (JEDEC) specification
In addition, the computer supports:
● 512Mbit and 1Gbit non-ECC memory technologies
● single-sided and double-sided SODIMMs
● SODIMMs constructed with x8 and x16 devices; SODIMMs constructed with x4 SDRAM are not
supported
NOTE: The system will not operate properly if you install unsupported SODIMMs.
Refer to the Computer Setup (F10) Utility Guide for information on how to determine the processor bus
frequency of a specific computer.
166 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis