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Xeon Phi 7285 - Intel
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Xeon Phi 7285
xeon phi knights mill (front).png
General Info
Model Number7285
Part NumberHJ8068303823800
MarketWorkstation, Server, Supercomputer
IntroductionDecember 18, 2017 (announced)
December 18, 2017 (launched)
End-of-lifeAugust 9, 2019 (last order)
July 31, 2020 (last shipment)
General Specs
FamilyXeon Phi
Frequency1,300 MHz
Turbo Frequency1,400 MHz (1 core)
Clock multiplier15
ISAx86-64 (x86)
MicroarchitectureKnights Mill
Core SteppingA0
Process14 nm
Word Size64 bit
Max Memory384 GiB
Max SMP1-Way (Uniprocessor)
Vcore0.55 V-1.2 V
TDP250 W
Tcase5 °C – 72 °C
TDTS5 °C – 84 °C
PackageFCLGA-3647 (FCLGA)
Dimension76.16 mm × 56.6 mm
Pitch0.8585 mm × 0.9906 mm
SocketSocket P, LGA-3647

Xeon Phi 7285 is a 68-core x86 many-core microprocessor introduced by Intel in late 2017 specifically designed to accelerate artificial intelligence workloads. This processor, which is fabricated on their own 14 nm process based on the Knights Mill microarchitecture, operates at a frequency of 1.3 GHz with a TDP of 250 W and a turbo of 1.4 GHz.

DIL16 Blank.svg Preliminary Data! Information presented in this article deal with a microprocessor or chip that was recently announced or leaked, thus missing information regarding its features and exact specification. Information may be incomplete and can change by final release.


Main article: Knights Mill § Cache

[Edit/Modify Cache Info]

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Cache Organization
Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory.

The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC.

Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies.

Note: All units are in kibibytes and mebibytes.
L1$4.25 MiB
4,352 KiB
4,456,448 B
L1I$2.125 MiB
2,176 KiB
2,228,224 B
68x32 KiB8-way set associative 
L1D$2.125 MiB
2,176 KiB
2,228,224 B
68x32 KiB8-way set associative 

L2$34 MiB
34,816 KiB
35,651,584 B
0.0332 GiB
  34x1 MiB16-way set associative 

Memory controller[edit]

[Edit/Modify Memory Info]

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Integrated Memory Controller
Max TypeDDR4-2400
Supports ECCYes
Max Mem384 GiB
Max Bandwidth107.3 GiB/s
109,875.2 MiB/s
115.212 GB/s
115,212.498 MB/s
0.105 TiB/s
0.115 TB/s
Single 17.88 GiB/s
Double 35.76 GiB/s
Quad 71.53 GiB/s
Hexa 107.3 GiB/s


[Edit/Modify Expansions Info]

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Expansion Options
PCIeRevision: 3.0
Max Lanes: 36
Configuration: x16, x8, x4, x2, x1


[Edit/Modify Supported Features]

Supported x86 Extensions & Processor Features
MMXMMX Extension
EMMXExtended MMX Extension
SSEStreaming SIMD Extensions
SSE2Streaming SIMD Extensions 2
SSE3Streaming SIMD Extensions 3
SSSE3Supplemental SSE3
SSE4.1Streaming SIMD Extensions 4.1
SSE4.2Streaming SIMD Extensions 4.2
AVXAdvanced Vector Extensions
AVX2Advanced Vector Extensions 2
AVX-512Advanced Vector 512-bit
AVX512FAVX-512 Foundation
AVX512CDAVX-512 Conflict Detection
AVX512ERAVX-512 Exponential and Reciprocal
AVX512PFAVX-512 Prefetch
AVX512_4FMAPSAVX-512 Fused Multiply-Accumulate Packed Single Precision
AVX512_4VNNIWAVX-512 Vector Neural Network Instructions Word Variable Precision
AVX512_VPOPCNTDQAVX-512 Vector Population Count Doubleword and Quadword
ABMAdvanced Bit Manipulation
BMI1Bit Manipulation Instruction Set 1
BMI2Bit Manipulation Instruction Set 2
FMA33-Operand Fused-Multiply-Add
AESAES Encryption Instructions
RdRandHardware RNG
CLMULCarry-less Multiplication Extension
F16C16-bit Floating Point Conversion
x86-1616-bit x86
x86-3232-bit x86
x86-6464-bit x86
RealReal Mode
ProtectedProtected Mode
SMMSystem Management Mode
FPUIntegrated x87 FPU
TBT 2.0Turbo Boost Technology 2.0
VT-xVT-x (Virtualization)
VT-dVT-d (I/O MMU virtualization)
EPTExtended Page Tables (SLAT)
Facts about "Xeon Phi 7285 - Intel"
Has subobject
"Has subobject" is a predefined property representing a container construct and is provided by Semantic MediaWiki.
Xeon Phi 7285 - Intel#pcie +
base frequency1,300 MHz (1.3 GHz, 1,300,000 kHz) +
clock multiplier15 +
core count68 +
core steppingA0 +
core voltage (max)1.2 V (12 dV, 120 cV, 1,200 mV) +
core voltage (min)0.55 V (5.5 dV, 55 cV, 550 mV) +
designerIntel +
familyXeon Phi +
first announcedDecember 18, 2017 +
first launchedDecember 18, 2017 +
full page nameintel/xeon phi/7285 +
has advanced vector extensionstrue +
has advanced vector extensions 2true +
has advanced vector extensions 512true +
has ecc memory supporttrue +
has extended page tables supporttrue +
has featureAdvanced Vector Extensions +, Advanced Vector Extensions 2 +, Advanced Vector Extensions 512 +, Advanced Encryption Standard Instruction Set Extension +, Hyper-Threading Technology +, Turbo Boost Technology 2.0 +, Intel VT-x +, Intel VT-d + and Extended Page Tables +
has intel turbo boost technology 2 0true +
has intel vt-d technologytrue +
has intel vt-x technologytrue +
has locked clock multipliertrue +
has second level address translation supporttrue +
has simultaneous multithreadingtrue +
has x86 advanced encryption standard instruction set extensiontrue +
instance ofmicroprocessor +
isax86-64 +
isa familyx86 +
l1$ size4,352 KiB (4,456,448 B, 4.25 MiB) +
l1d$ description8-way set associative +
l1d$ size2,176 KiB (2,228,224 B, 2.125 MiB) +
l1i$ description8-way set associative +
l1i$ size2,176 KiB (2,228,224 B, 2.125 MiB) +
l2$ description16-way set associative +
l2$ size34 MiB (34,816 KiB, 35,651,584 B, 0.0332 GiB) +
last orderAugust 9, 2019 +
last shipmentJuly 31, 2020 +
ldateDecember 18, 2017 +
main imageFile:xeon phi knights mill (front).png +
manufacturerIntel +
market segmentWorkstation +, Server + and Supercomputer +
max case temperature345.15 K (72 °C, 161.6 °F, 621.27 °R) +
max cpu count1 +
max dts temperature84 °C +
max memory393,216 MiB (402,653,184 KiB, 412,316,860,416 B, 384 GiB, 0.375 TiB) +
max memory bandwidth107.3 GiB/s (109,875.2 MiB/s, 115.212 GB/s, 115,212.498 MB/s, 0.105 TiB/s, 0.115 TB/s) +
max memory channels6 +
microarchitectureKnights Mill +
min case temperature278.15 K (5 °C, 41 °F, 500.67 °R) +
min dts temperature5 °C +
model number7285 +
nameXeon Phi 7285 +
packageFCLGA-3647 +
part numberHJ8068303823800 +
process14 nm (0.014 μm, 1.4e-5 mm) +
s-specSR3VE +
seriesx205 +
smp max ways1 +
socketSocket P + and LGA-3647 +
supported memory typeDDR4-2400 +
tdp250 W (250,000 mW, 0.335 hp, 0.25 kW) +
technologyCMOS +
thread count272 +
turbo frequency (1 core)1,400 MHz (1.4 GHz, 1,400,000 kHz) +
word size64 bit (8 octets, 16 nibbles) +