Dell PowerEdge M420 Hardware Owner's Manual - Page 130

Option F1/F2 Prompt on Error (Enables default) Description Enables the system to halt on errors during POST, which allows the user to observe events that may scroll by unnoticed during normal POST. You can select to continue or to enter the System Setup program. CAUTION: When setting this option to Disabled, the system does not halt if an error occurs during POST. Any critical errors will be displayed and logged in the system event log. Memory Settings Screen Option Description System Memory Size Displays the amount of system memory. System Memory Type Displays the type of system memory. System Memory Speed Displays the system memory speed. System Memory Voltage (PowerEdge M710HD) Displays the current operating voltage of the system memory. Video Memory Displays the amount of video memory. System Memory Testing Specifies whether system memory tests are run at system (Enabled default) boot. Options are Enabled and Disabled. Memory Operating Mode (PowerEdge M710, M710HD, M610, and M610x) This field displays the type of memory operation if a valid memory configuration is installed. When set to Optimizer Mode, the two memory controllers run in parallel 64-bit mode for improved memory performance. When set to Mirror Mode, memory mirroring is enabled. When set to Advanced ECC Mode, the controllers are joined in 128-bit mode running multi-bit advanced ECC. Memory Optimizer (Enabled default) (PowerEdge M905, M805, and M605) If set to Disabled, the two DRAM controllers operate in 128-bit mode, and memory reliability is enhanced. If set to Enabled, the memory controllers operate independently in 64-bit mode, and memory performance is optimized. 130 Using the System Setup Program and UEFI Boot Manager