HP dx7300 non-ECC, DIMMs only, memory incompatible, These systems are shipped with

Processor/Memory Subsystem

These systems support DIMMs with the following parameters:

■Unbuffered, compatible with SPD rev. 1.0

■256-Mb, 512-Mb, and 1-Gb memory technologies for x8 and x16 devices

■CAS latency (CL) of 5 or 6 (depending on memory speed)

■Single or double-sided

■Non-ECC memory only

The SPD format supported by these systems complies with the JEDEC specification for 128-byte EEPROMs. This system also provides support for 256-byte EEPROMs to include additional HP-added features such as part number and serial number. The SPD format as supported in this system (SPD rev. 1) is shown in Table 3-1.

If BIOS detects an unsupported DIMM, a “memory incompatible” message will be displayed and the system will halt. These systems are shipped with non-ECC DIMMs only. Refer to chapter 8 for a description of the BIOS procedure of interrogating DIMMs.

An installed mix of DIMM types is acceptable but operation will be constrained to the level of the DIMM with the lowest (slowest) performance specification.

If an incompatible DIMM is detected the NUM LOCK will blink for a short period of time during POST and an error message may or may not be displayed before the system hangs.

Technical Reference Guide www.hp.com 3-5