Intel® Virtualization Technology for Directed I/O (VT-d) continues from the existing support for IA-32 (VT-x) and Itanium® processor (VT-i) virtualization adding new support for I/O-device virtualization. Intel VT-d can help end users improve security and reliability of the systems and also improve performance of I/O devices in virtualized environments.
Intel® VT-x with Extended Page Tables (EPT), also known as Second Level Address Translation (SLAT), provides acceleration for memory intensive virtualized applications. Extended Page Tables in Intel® Virtualization Technology platforms reduces the memory and power overhead costs and increases battery life through hardware optimization of page table management.
Intel® Turbo Boost Technology dynamically increases the processor's frequency as needed by taking advantage of thermal and power headroom to give you a burst of speed when you need it, and increased energy efficiency when you don’t.
Products specifications
| Attribute name |
Attribute value |
|
Processor family
|
Intel® Xeon Phi™ |
|
Processor model
|
7255 |
|
Processor boost frequency
|
1.20 GHz |
|
Processor cores
|
68 |
|
Processor cache
|
34816 KB |
|
Processor base frequency
|
1.10 GHz |
|
VID Voltage Range
|
0.55 - 1.2 V |
|
Maximum internal memory
|
393216 MB |
|
Tcase
|
DDR4-SDRAM, DDR3-SDRAM |
|
Supported instruction sets
|
AVX-512 |
|
Memory clock speeds supported by processor
|
2400 MHz |
|
Processor manufacturer
|
Intel |
|
Processor cache type
|
L2 |
|
Status
|
Launched |
|
On-board graphics card
|
No |
|
Intel Software Guard Extensions (Intel SGX)
|
No |
|
Cooler included
|
No |
|
Box
|
No |
|
Market segment
|
Server |
|
Intel® Memory Protection Extensions (Intel® MPX)
|
No |
|
Product type
|
1 |
|
Memory channels
|
Hexa-channel |
|
Component for
|
Server/workstation |
|
ECC
|
Yes |
|
Processor ARK ID
|
128693 |
|
Processor codename
|
Knights Mill |
|
Thermal Design Power (TDP)
|
215 W |
|
Memory bandwidth supported by processor (max)
|
115.2 GB/s |
|
Maximum internal memory supported by processor
|
384 GB |
|
PCI Express slots version
|
3.0 |
|
Processor lithography
|
14 nm |
|
Processor operating modes
|
64-bit |
|
Processor socket
|
LGA 3647 (Socket P) |
|
PCI Express configurations
|
1x16, 1x4, 1x8 |
|
Conflict-Free processor
|
Yes |
|
Maximum number of PCI Express lanes
|
36 |
|
Intel® Turbo Boost Technology
|
2.0 |
|
Memory types supported by processor
|
DDR4-SDRAM |
|
Embedded options available
|
No |
|
Execute Disable Bit
|
Yes |
|
Idle States
|
Yes |
|
Intel 64
|
Yes |
|
Intel Enhanced Halt State
|
Yes |
|
Intel Trusted Execution Technology
|
No |
|
Intel Virtualization Technology (VT-x)
|
Yes |
|
Intel VT-x with Extended Page Tables (EPT)
|
Yes |
|
Intel® AES New Instructions (Intel® AES-NI)
|
Yes |
|
Thermal Monitoring Technologies
|
Yes |
