The next generation of DDR3 has arrived. New chipsets and processors from AMD® and Intel® now support memory operating at 1866MT/s (aka 1866MHz). DDR3-1866 memory has a module classification of PC3-14900, which effectively means the peak data rate of the module is 14.9GB/s (see table). That’s approximately a 14-percent improvement on memory bandwidth over DDR3-1600.
||Module Peak Bandwidth
||6400 MB/sec. or
|8500 MB/sec. or
|10600 MB/sec. or
|12800 MB/sec. or
||14900 MB/sec. or
In servers, the processor model number affects how fast the memory can operate. Higher model numbers support 1866MT/s but may be limited by the number of DIMMs per Channel that are installed or by the type of server/workstation motherboard.
Step 1 — Know Your System
Only the latest generation of chipsets and processors support DDR3-1866 memory.
Quad Channel Memory Architecture
- Intel Xeon™ E5 v2
- C600 Series Chipset
- AMD Opteron™ 6300 Series
Available capacities at 1866MT/s are:
- 2GB, 4GB, 8GB ECC DIMMs (Workstation/Server)
- 4GB, 8GB, 16GB Registered ECC DIMMs (Server)
Step 2 — Maximize Server Memory Performance
New Xeon E5 v2 and AMD Opteron 6300 servers support up to 1 DIMM per Channel (see table).
|Xeon E5 v2 / AMD Opteron 6300
|1 DIMM per
Channel (1 DPC)
|2 DIMMs per
Channel (2 DPC)
Step 3 — Determine the memory bandwidth for your applications
- DDR3-1866 effectively increases bandwidth over DDR3-1600 by approximately 14 percent.
- Quad Channel architecture such as those supported on Xeon E5 “v2” and Opteron 6300 platforms increases memory bandwidth by up to 35% over previous Triple Channel architecture.
- Some applications may require the maximum memory bandwidth available, such as 3D applications, CG, CAD and mechanical/industrial design, technical and scientific computing, digital content creation and video games.