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Xeon D-1557
General Info
Designer	Intel
Manufacturer	Intel
Model Number	D-1557
Part Number	GG8067402570702
S-Spec	SR2M4
Market	Server, Embedded
Introduction	February 24, 2016 (announced) February 24, 2016 (launched)
Release Price	$694.00 (tray)
Shop	Amazon
General Specs
Family	Xeon D
Series	D-1500
Locked	Yes
Frequency	1,500 MHz
Turbo Frequency	2,100 MHz (1 core)
Bus type	DMI 2.0
Clock multiplier	15
Microarchitecture
ISA	x86-64 (x86)
Microarchitecture	Broadwell
Platform	Grangeville
Core Name	Broadwell DE
Core Family	6
Core Model	6
Core Stepping	Y0
Process	14 nm
Transistors	4,700,000,000
Technology	CMOS
Die	306.18 mm²
Word Size	64 bit
Cores	12
Threads	24
Max Memory	128 GiB
Multiprocessing
Max SMP	1-Way (Uniprocessor)
Electrical
TDP	45 W
OP Temperature	0 °C – 108 °C
Packaging
Package	FCBGA-1667 (FCBGA)
Dimension	37.5 mm × 37.5 mm × 3.557 mm
Pitch	0.7 mm
Contacts	1667

Xeon D-1557 is a 64-bit dodeca-core x86 microserver SoC introduced by Intel in early 2016. The D-1557 is based on the Broadwell microarchitecture and is fabricated on their 14 nm process. It operates at 1.5 GHz with a TDP of 45 W and a turbo frequency of 2.1 GHz. This processor supports up to 128 GiB of dual-channel DDR4-2133 memory.

Cache

Main article: Broadwell § Cache

[Edit/Modify Cache Info]

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 786,432 B 0.75 MiB L1I$ 384 KiB 393,216 B 0.375 MiB 12x32 KiB 8-way set associative   L1D$ 384 KiB 393,216 B 0.375 MiB 12x32 KiB 8-way set associative write-back L2$ 3 MiB 3,072 KiB 3,145,728 B 0.00293 GiB     12x256 KiB 8-way set associative write-back L3$ 18 MiB 18,432 KiB 18,874,368 B 0.0176 GiB     12x1.5 MiB 16-way set associative write-back

Graphics

This SoC has no integrated graphics processing unit.

Memory controller

[Edit/Modify Memory Info]

	Integrated Memory Controller
	Max Type DDR4-2133 Supports ECC Yes Max Mem 128 GiB Controllers 1 Channels 2 Max Bandwidth 31.78 GiB/s 32,542.72 MiB/s 34.124 GB/s 34,123.515 MB/s 0.031 TiB/s 0.0341 TB/s Bandwidth Single 15.89 GiB/s Double 31.78 GiB/s

Expansions

[Edit/Modify Expansions Info]

	Expansion Options
	PCIe Revision 2.0 Max Lanes 8 Configs x4, x16 USB Revision 2.0, 3.0 Ports 8 UART Integrated LAN Yes

Networking

Networking
SFI interface	Yes
KR interface	Yes
KR4 interface	No
KX interface	Yes
KX4 interface	No
10Base-T	No
100Base-T	No
1000Base-T	Yes
10GBase-T	Yes

Features

[Edit/Modify Supported Features]

Supported x86 Extensions & Processor Features

MMX MMX Extension SSE Streaming SIMD Extensions SSE2 Streaming SIMD Extensions 2 SSE3 Streaming SIMD Extensions 3 SSSE3 Supplemental SSE3 AVX Advanced Vector Extensions AVX2 Advanced Vector Extensions 2 BMI1 Bit Manipulation Instruction Set 1 BMI2 Bit Manipulation Instruction Set 2 FMA3 3-Operand Fused-Multiply-Add AES AES Encryption Instructions F16C 16-bit Floating Point Conversion NX No-eXecute HT Hyper-Threading TBT 2.0 Turbo Boost Technology 2.0 EIST Enhanced SpeedStep Technology TXT Trusted Execution Technology (SMX) TSX Transactional Synchronization Extensions