HP Dc7100 Hardware Reference Guide -- HP Compaq Business Desktops dc7100 Conve - Page 26

Hardware Upgrades The following processor bus frequencies are required for the system to run at the supported memory frequencies. Memory Frequency 333 MHz 400 MHz Required Processor Bus Frequency 533 MHz or 800 MHz 800 MHz If a memory frequency is paired with an unsupported processor bus frequency, the system will run at the highest supported memory speed. For example, if a 400 MHz DIMM is paired with a 533 MHz processor bus, the system will run at 400 MHz, the highest supported memory speed. ✎ The system will not start if you install unsupported DIMMs. Refer to the Computer Setup (F10) Utility Guide on the Documentation CD for information on how to determine the processor bus frequency of a specific computer. Populating DIMM Sockets The system will automatically operate in single channel mode, dual channel Asymmetric mode, or a higher-performing dual channel Interleaved mode, depending on how the DIMMs are installed. ■ The system will operate in single channel mode if the DIMM sockets are populated in one channel only. ■ The system will operate in dual channel Asymmetric mode if the total memory capacity of the DIMMs in Channel A is not equal to the total memory capacity of the DIMMs in Channel B. ■ The system will operate in a higher-performing dual channel Interleaved mode if the total memory capacity of the DIMMs in Channel A is equal to the total memory capacity of the DIMMs in Channel B. However, the technology and device width can vary between the channels. For example, if Channel A is populated with two 256MB DIMMS and Channel B is populated with one 512MB DIMM, the system will operate in Interleaved mode. 2-10 www.hp.com Hardware Reference Guide