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EPYC Embedded 3255 - AMD
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EPYC Embedded 3255
General Info
DesignerAMD
ManufacturerGlobalFoundries
Model Number3255
Part NumberPE3255BGR88AF
MarketServer, Embedded
ShopAmazon
General Specs
FamilyEPYC Embedded
Series3000
Frequency2,500 MHz
Turbo Frequency,
3,100 MHz (8 cores)
Clock multiplier25
Microarchitecture
ISAx86-64 (x86)
MicroarchitectureZen
Core NameSnowy Owl
Core Family23
Core Model1
Process14 nm
Transistors9,600,000,000
TechnologyCMOS
Die213 mm²
Word Size64 bit
Cores8
Threads16
Max Memory512 GiB
Multiprocessing
Max SMP1-Way (Uniprocessor)
Electrical
TDP55 W
cTDP down30 W
Tjunction-40 °C – 105 °C
Packaging
PackageSP4r2 (BGA)

EPYC Embedded 3255 is a 64-bit octa-core x86 embedded microprocessor for dense servers and edge devices. Fabricated on a 14 nm process based on the Zen microarchitecture, this chip operates at 2.5 GHz with a TDP of 55 W and a turbo frequency of up to 3.1 GHz. This model supports a configurable TDP-down of 30 W and is distinguished from other EPYC Embedded 3000 Series processors by an industrial temperature range of -40 to 105 °C. The 3255 supports up to 512 GiB of dual-channel DDR4-2666 memory.

Cache[edit]

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$768 KiB
0.75 MiB
786,432 B
7.324219e-4 GiB
L1I$512 KiB
0.5 MiB
524,288 B
4.882812e-4 GiB
8 × 64 KiB4-way set associative 
L1D$256 KiB
0.25 MiB
262,144 B
2.441406e-4 GiB
8 × 32 KiB8-way set associativewrite-back

L2$4 MiB
4,096 KiB
4,194,304 B
0.00391 GiB
  8 × 512 KiB8-way set associativewrite-back

L3$16 MiB
16,384 KiB
16,777,216 B
0.0156 GiB
  2 × 8 MiB  

Memory controller[edit]

[Edit/Modify Memory Info]

ram icons.svg
Integrated Memory Controller
Max TypeDDR4-2666
Supports ECCYes
Max Mem512 GiB
Controllers2
Channels2
Max Bandwidth39.74 GiB/s
69.148 GB/s
40,693.76 MiB/s
0.0388 TiB/s
0.0427 TB/s
Bandwidth
Single 19.87 GiB/s
Double 39.74 GiB/s
[Edit] Official AMD Supported Memory Configurations
Quad Channel Single Rank 1 DIMM per channel 4 of 8 DDR4-2666
2 DIMMs per channel 8 of 8 DDR4-2133
Dual Rank 1 DIMM per channel 4 of 8 DDR4-2400
2 DIMMs per channel 8 of 8 DDR4-1866

Expansions[edit]

The EPYC Embedded 3255 supports up to 32 PCIe Gen 3 (8 GT/s) lanes. Some of these lanes can be configured as SATA 3 (6 Gb/s) and 10 Gigabit Ethernet ports. Up to 8 SATA ports and 4 GbE ports are available on this model, as well as four USB 3.1 Gen 1 (5 Gb/s) ports, and the following low speed interfaces: EMMC, eSPI, GPIO, I2C, LPC, SMBus, SPI, UART.

[Edit/Modify Expansions Info]

ide icon.svg
Expansion Options
PCIeRevision: 3.0
Max Lanes: 32
Configuration: x16, x8, x4, x2
USBRevision: 3.1
Max Ports: 4
SATARevision: 3.0
Max Ports: 8

[Edit/Modify Network Info]

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Networking
Ethernet
10GbEYes (Ports: 4)

Features[edit]

[Edit/Modify Supported Features]

Cog-icon-grey.svg
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
NXNo-eXecute
SMTSimultaneous Multithreading
AMD-ViAMD-Vi (I/O MMU virtualization)
AMD-VAMD Virtualization
SMESecure Memory Encryption
TSMETransparent SME
SEVSecure Encrypted Virtualization
SenseMISenseMI Technology

References[edit]

Has subobject
"Has subobject" is a predefined property representing a container construct and is provided by Semantic MediaWiki.
EPYC Embedded 3255 - AMD#pcie +
base frequency2,500 MHz (2.5 GHz, 2,500,000 kHz) +
clock multiplier25 +
core count8 +
core family23 +
core model1 +
core nameSnowy Owl +
designerAMD +
die area213 mm² (0.33 in², 2.13 cm², 213,000,000 µm²) +
familyEPYC Embedded +
full page nameamd/epyc embedded/3255 +
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 featureindustrial temperature range +, Advanced 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 +
isax86-64 +
isa familyx86 +
l1$ size0.75 MiB (768 KiB, 786,432 B, 7.324219e-4 GiB) +
l1d$ description8-way set associative +
l1d$ size0.25 MiB (256 KiB, 262,144 B, 2.441406e-4 GiB) +
l1i$ description4-way set associative +
l1i$ size0.5 MiB (512 KiB, 524,288 B, 4.882812e-4 GiB) +
l2$ description8-way set associative +
l2$ size4 MiB (4,096 KiB, 4,194,304 B, 0.00391 GiB) +
l3$ size16 MiB (16,384 KiB, 16,777,216 B, 0.0156 GiB) +
ldate1900 +
manufacturerGlobalFoundries +
market segmentServer + and Embedded +
max cpu count1 +
max junction temperature378.15 K (105 °C, 221 °F, 680.67 °R) +
max memory524,288 MiB (536,870,912 KiB, 549,755,813,888 B, 512 GiB, 0.5 TiB) +
max memory bandwidth39.74 GiB/s (69.148 GB/s, 40,693.76 MiB/s, 0.0388 TiB/s, 0.0427 TB/s) +
max memory channels2 +
max sata ports8 +
max usb ports4 +
microarchitectureZen +
min junction temperature233.15 K (-40 °C, -40 °F, 419.67 °R) +
model number3255 +
nameEPYC Embedded 3255 +
part numberPE3255BGR88AF +
process14 nm (0.014 μm, 1.4e-5 mm) +
series3000 +
smp max ways1 +
supported memory typeDDR4-2666 +
tdp55 W (55,000 mW, 0.0738 hp, 0.055 kW) +
tdp down30 W (30,000 mW, 0.0402 hp, 0.03 kW) +
technologyCMOS +
thread count16 +
transistor count9,600,000,000 +
turbo frequency (8 cores)3,100 MHz (3.1 GHz, 3,100,000 kHz) +
word size64 bit (8 octets, 16 nibbles) +