Dell PowerEdge T310 Hardware Owner's Manual - Page 109

• Memory modules of different sizes can be mixed in A1-A3 or B1-B3 (for example, 2-GB and 4-GB), but all populated channels must have identical configurations. • The memory speed of each channel depends on the memory configuration: - For single- or dual-rank memory modules: • One memory module per channel supports up to 1333 MHz. • Two memory modules per channel support up to 1333 MHz. • Three memory modules per channel support up to 800 MHz. - For quad-rank memory modules: • One memory module per channel supports up to 1067 MHz. • Two memory modules per channel are limited to 800 MHz, regardless of memory module speed. • If quad-rank memory modules are mixed with single- or dual-rank modules, the quad-rank modules must be installed in the sockets with the white release levers. • If memory modules with different speeds are installed, they will operate at the speed of the slowest installed memory module(s). Mode-Specific Guidelines There are two memory channels with each channel supporting a maximum of three RDIMMs and two UDIMMs. Table 3-1 and Table 3-2 show sample memory configurations that follow the appropriate memory guidelines stated in this section. The samples show identical memory-module configurations and the physical and available memory totals. The tables do not show mixed or quad-rank memory-module configurations, nor do they address the memory speed considerations of any configuration. Installing System Components 109