Memory typesLearn more about your memory choices to better match our solutions to your needs. For our latest servers, we offer double-data rate type 3 (DDR3) digital RAM solutions that support larger capacities, higher frequencies, greater bandwidth, lower latency and lower operating voltages than previous-generation DDR2 memory. Your DDR3 options include:
Standard Voltage (SV) DDR3 operates at 1.5 volts, which is currently required for 1866 million transfers per second (MT/s).
Low Voltage (LV) DDR3 operates at 1.35 volts or 1.5 volts. At 1.35 volts the memory can consume less power and reduce heat, but can still be boosted to 1.5V when the memory channel requires additional voltage to help maintain maximum speed.
DIMMsChoose from three different dual in-line memory modules (DIMM) architectures — UDIMM, RDIMM and LRDIMM.
UDIMM is an unbuffered, low-density, low-latency DIMM that doesn’t include a register or a buffer chip. UDIMMs are generally used in applications requiring the lowest possible latency.
RDIMM is a registered DIMM that provides high signal integrity — performing parity checking to detect improper addresses or commands — and increased performance for heavy workloads. RDIMMs experience slightly increased latency and power consumption over UDIMMs due to the onboard register.
LRDIMM uses a buffer to reduce memory loading to a single load on all DDR signals, allowing for greater density.