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A1
General Info
Designer	Ampere Computing
Manufacturer	TSMC
Model Number	A1
Market	Server
Introduction	February 5, 2018 (announced)
Release Price	$950
General Specs
Turbo Frequency	3,300 MHz
Microarchitecture
ISA	ARMv8 (ARM)
Process	16 nm
Technology	CMOS
Word Size	64 bit
Cores	32
Threads	32
Max Memory	1 TiB
Multiprocessing
Max SMP	1-Way (Uniprocessor)
Electrical
Vcore	0.85 V
VI/O	1.8, 3.3
TDP	125 W
Tjunction	0 °C – 90 °C
Packaging
Package FCBGA-3211 (BGA) Dimension 50 mm x 50 mm Contacts 3,211

A1 is a 64-bit 32-core ARM server microprocessor introduced by Ampere in 2018. Fabricated on TSMC's 16FF+ based on the Skylark microarchitecture, this processor operates at 3 GHz with a turbo frequency of up to 3.3 GHz and 125 W TDP. This processor supports up to 8 channels of DDR4-2666 ECC memory.

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.

Cache

Main article: Skylark § 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$ 2 MiB 2,048 KiB 2,097,152 B L1I$ 1 MiB 1,024 KiB 1,048,576 B 32x32 KiB     L1D$ 1 MiB 1,024 KiB 1,048,576 B 32x32 KiB   write-through L2$ 4 MiB 4,096 KiB 4,194,304 B 0.00391 GiB     16x256 KiB     L3$ 32 MiB 32,768 KiB 33,554,432 B 0.0313 GiB     1x32 MiB

Memory controller

[Edit/Modify Memory Info]

	Integrated Memory Controller
	Max Type DDR4-2666, DDR4-2400 Supports ECC Yes Max Mem 1 TiB Controllers 8 Channels 8 Max Bandwidth 158.95 GiB/s 162,764.8 MiB/s 170.671 GB/s 170,671.263 MB/s 0.155 TiB/s 0.171 TB/s Bandwidth Single 19.89 GiB/s Double 39.72 GiB/s Quad 79.47 GiB/s Hexa 119.21 GiB/s Octa 158.95 GiB/s

Expansions

[Edit/Modify Expansions Info]

	Expansion Options
PCIe Revision: 3.0 Max Lanes: 42 Configuration: x16, x8, x4 USB Revision: 2.0 Max Ports: 2 SATA Revision: 3 Max Ports: 4

Features

[Edit/Modify Supported Features]

	Supported ARM Extensions & Processor Features
	NEON Advanced SIMD extension TrustZone TrustZone Security Extensions Crypto Cryptographic Extension FP Floating-point Extension

Block Diagram