Memory
SSD
USB Drives
Flash Cards
Wireless
Support
MEMORY SEARCH

Best Practices

Why 1866?

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 that the peak data rate of the module is 14.9GB/s (see table). That’s approximately a 14 per cent improvement on memory bandwidth over DDR3-1600.

Technology MHz Speed
(Data Rate)
Module Classification Module Peak Bandwidth
DDR3 (1.5V)
DDR3L (1.35V)
DDR3U (1.25V)
800 (DDR3-800) PC3-6400 6400 MB/sec. or
6.4 GB/sec.
1066 (DDR3-1066) PC3-8500
PC3L-8500
8500 MB/sec. or
8.5 GB/sec.
1333 (DDR3-1333) PC3-10600
PC3L-10600
10600 MB/sec. or
10.6 GB/sec.
1600 (DDR3-1600) PC3-12800
PC3L-12800
12800 MB/sec. or
12.8 GB/sec.
1866 (DDR3-1866) PC3-14900 14900 MB/sec. or
14.9 GB/sec.

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 – Maximise 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 1.5V
Module Type Module Ranks
SR/DR=Single/Dual
1 DIMM per
Channel
1 DPC
2 DIMMs per
Channel
2 DPC
Registered
DIMM (RDIMM)
SR/DR 1866 1600

Step 3 – Determine the memory bandwidth for your applications

  • DDR3-1866 effectively increases bandwidth over DDR3-1600 by approximately 14 per cent.
  • Quad-channel architectures such as those supported on Xeon E5 “v2” and Opteron 6300 platforms increase 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.

Conclusion

Find the Kingston memory you need. Contact your Kingston representative or Ask a Kingston Expert.