| Type |
CPU / Microprocessor |
| Market segment |
Server |
| Family |
Intel Xeon E3-1200 v3 |
| Model number |
E3-1281 v3 |
| CPU part numbers |
CM8064601575329 / CM8064601575381 is an OEM/tray CPU |
| Spec codes |
SR1R2 / SR21F |
| Frequency |
3700 MHz |
| Turbo frequency |
4100 MHz (1 core) |
| |
3900 MHz (all cores) |
| Bus speed |
5 GT/s DMI |
| Clock multiplier |
37 |
| Package |
1150-land Flip-Chip Land Grid Array |
| Socket |
Socket 1150 / H3 / LGA1150 |
| |
|
| Microarchitecture |
Haswell |
| Platform |
Denlow |
| Processor core |
Haswell LGA1150 |
| Core stepping |
C0 (QFFJ, SR1R2, SR21F) |
| Manufacturing process |
0.022 micron |
| Data width |
64 bit |
| The number of CPU cores |
4 |
| The number of threads |
8 |
| Floating Point Unit |
Integrated |
| Level 1 cache size |
4 x 32 KB |
| Level 2 cache size |
4 x 256 KB |
| Level 3 cache size |
8 MB |
| Physical memory |
32 GB |
| Multiprocessing |
Uniprocessor |
| |
|
| Integrated graphics |
None |
| Memory controller |
The number of controllers: 1 |
| |
Memory channels: 2 |
| |
Supported memory: DDR3-1333, DDR3-1600 |
| |
DIMMs per channel: up to 2 |
| |
Maximum memory bandwidth (GB/s): 25.6 |
| |
ECC supported: Yes |
| Other peripherals |
Direct Media Interface 2.0 |
| |
PCI Express 3.0 interface |
| Thermal Design Power |
82 Watt |
