Dell OptiPlex 390 Technical Guide - Page 11

DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL MEMORY NOTE: Memory modules should be installed in pairs of matched memory size, speed, and technology. If the memory modules are not installed in matched pairs, the computer will continue to operate, but with a slight reduction in performance. The entire 8GB memory range is available to 64-bit operating systems. Type: DDR3 Synch DRAM Non-ECC Memory DIMM Slots DIMM Capacities Minimum Memory Maximum System Memory MT 2 Up to 4GB 1GB 8GB1 DT 1333MHz 2 Up to 4GB 1GB 8GB1 SFF 2 Up to 4GB 1GB 8GB1 Memory configurations 8GB1 DDR3, 1333MHz, (2 DIMM) 4GB1 DDR3, 1333MHz, (1 DIMM) X X X X X X 3GB DDR3, 1333MHz, (2 DIMM) 2GB DDR3, 1333MHz, (1 DIMM) 1GB DDR3, 1333MHz, (1 DIMM) X X X X X X X X X 1 The total amount of available memory will be less than 4GB. The amount less depends on the actual system configuration. To fully utilize 4GB or more of memory requires a 64-bit enabled processor and 64-bit operating system. 11