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EPYC Embedded 3401 - AMD
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EPYC Embedded 3401
General Info
Model Number3401
MarketServer, Embedded
IntroductionFebruary 21, 2018 (announced)
February 21, 2018 (launched)
General Specs
FamilyEPYC Embedded
Frequency1,850 MHz
Turbo Frequency3,000 MHz (1 core),
2,250 MHz (16 cores)
Clock multiplier18.5
ISAx86-64 (x86)
Core NameSnowy Owl
Process14 nm
Die213 mm²
MCPYes (2 dies)
Word Size64 bit
Max CPUs1 (Uniprocessor)
Max Memory1 TiB
Tjunction0 °C – 105 °C
PackageSP4 (BGA)

EPYC Embedded 3401 is a 64-bit hexadeca-core x86 embedded microprocessor introduced by AMD in early 2018 for dense servers and edge devices. Fabricated on a 14 nm process based on the Zen microarchitecture, this chip operates at 1.85 GHz with a TDP of 85 W and a turbo frequency of up to 3 GHz. The 3401 supports up to 1 TiB of quad-channel DDR4-2666 ECC memory.

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: Zen § Cache

[Edit/Modify Cache Info]

hierarchy icon.svg
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$1.5 MiB
1,536 KiB
1,572,864 B
0.00146 GiB
L1I$1 MiB
1,024 KiB
1,048,576 B
9.765625e-4 GiB
16x64 KiB4-way set associative 
L1D$512 KiB
0.5 MiB
524,288 B
4.882812e-4 GiB
16x32 KiB8-way set associativewrite-back

L2$8 MiB
8,192 KiB
8,388,608 B
0.00781 GiB
  16x512 KiB8-way set associativewrite-back

L3$32 MiB
32,768 KiB
33,554,432 B
0.0313 GiB
  4x8 MiB16-way set associativewrite-back

Memory controller[edit]

[Edit/Modify Memory Info]

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Integrated Memory Controller
Max TypeDDR4-2666
Supports ECCYes
Max Mem1 TiB
Max Bandwidth79.47 GiB/s
Single 19.87 GiB/s
Double 39.74 GiB/s
Quad 79.47 GiB/s
[Edit] Memory Configurations
Quad Channel Single Rank 1 DIMM DDR4-2666
2 DIMMs DDR4-2133
Double Rank 1 DIMM DDR4-2400
2 DIMMs DDR4-1866


The EPYC Embedded 3401 has 64 PCIe lanes that are MUX'ed with a number of other ports and can be reconfigured as either SATA ports (up to 16 such ports), or as GbE ports (up to 10 such ports), or any mixed configuration of those options.

[Edit/Modify Expansions Info]

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Expansion Options
PCIeRevision: 3.0
Max Lanes: 64
Configuration: x16, x8, x4, x2
SATARevision: 3.0
Max Ports: 16

[Edit/Modify Network Info]

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10GbEYes (Ports: 10)


[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
SSE4aStreaming SIMD Extensions 4a
AVXAdvanced Vector Extensions
AVX2Advanced Vector Extensions 2
ABMAdvanced Bit Manipulation
BMI1Bit Manipulation Instruction Set 1
BMI2Bit Manipulation Instruction Set 2
FMA33-Operand Fused-Multiply-Add
AESAES Encryption Instructions
RdRandHardware RNG
SHASHA Extensions
ADXMulti-Precision Add-Carry
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
SMTSimultaneous Multithreading
AMD-ViAMD-Vi (I/O MMU virtualization)
AMD-VAMD Virtualization
SMESecure Memory Encryption
TSMETransparent SME
SEVSecure Encrypted Virtualization
SenseMISenseMI Technology
Has subobject
"Has subobject" is a predefined property representing a container construct and is provided by Semantic MediaWiki.
EPYC Embedded 3401 - AMD#pcie +
base frequency1,850 MHz (1.85 GHz, 1,850,000 kHz) +
clock multiplier18.5 +
core count16 +
core nameSnowy Owl +
designerAMD +
die area213 mm² (0.33 in², 2.13 cm², 213,000,000 µm²) +
die count2 +
familyEPYC Embedded +
first announcedFebruary 21, 2018 +
first launchedFebruary 21, 2018 +
full page nameamd/epyc embedded/3401 +
has advanced vector extensionstrue +
has advanced vector extensions 2true +
has amd amd-v technologytrue +
has amd amd-vi technologytrue +
has amd secure encrypted virtualization technologytrue +
has amd secure memory encryption technologytrue +
has amd sensemi technologytrue +
has amd transparent secure memory encryption technologytrue +
has ecc memory supporttrue +
has featureAdvanced Vector Extensions +, Advanced Vector Extensions 2 +, Advanced Encryption Standard Instruction Set Extension + and SenseMI Technology +
has simultaneous multithreadingtrue +
has x86 advanced encryption standard instruction set extensiontrue +
instance ofmicroprocessor +
is multi-chip packagetrue +
isax86-64 +
isa familyx86 +
l1$ size1.5 MiB (1,536 KiB, 1,572,864 B, 0.00146 GiB) +
l1d$ description8-way set associative +
l1d$ size0.5 MiB (512 KiB, 524,288 B, 4.882812e-4 GiB) +
l1i$ description4-way set associative +
l1i$ size1 MiB (1,024 KiB, 1,048,576 B, 9.765625e-4 GiB) +
l2$ description8-way set associative +
l2$ size8 MiB (8,192 KiB, 8,388,608 B, 0.00781 GiB) +
l3$ description16-way set associative +
l3$ size32 MiB (32,768 KiB, 33,554,432 B, 0.0313 GiB) +
ldateFebruary 21, 2018 +
manufacturerGlobalFoundries +
market segmentServer + and Embedded +
max cpu count1 +
max junction temperature378.15 K (105 °C, 221 °F, 680.67 °R) +
max memory1,048,576 MiB (1,073,741,824 KiB, 1,099,511,627,776 B, 1,024 GiB, 1 TiB) +
max sata ports16 +
microarchitectureZen +
min junction temperature273.15 K (0 °C, 32 °F, 491.67 °R) +
model number3401 +
nameEPYC Embedded 3401 +
process14 nm (0.014 μm, 1.4e-5 mm) +
series3000 +
supported memory typeDDR4-2666 +
tdp85 W (85,000 mW, 0.114 hp, 0.085 kW) +
technologyCMOS +
thread count16 +
transistor count9,600,000,000 +
turbo frequency (16 cores)2,250 MHz (2.25 GHz, 2,250,000 kHz) +
turbo frequency (1 core)3,000 MHz (3 GHz, 3,000,000 kHz) +
word size64 bit (8 octets, 16 nibbles) +