Apple S4 vs Apple S5 Full Specs - HMC

2 Cores 2 Threads 1.59GHz	2 Cores 2 Threads 1.59GHz
TDP 2W	TDP 2W
Bandwidth 12.8GB/s LPDDR4	Bandwidth 12.8GB/s LPDDR4
iGPU S4	iGPU S5
·· 71.94 GFLOPSFP16	·· 71.94 GFLOPSFP16

S412.8GB/s

x1

S512.8GB/s

x1

2 Cores	2 Cores
2 Threads	2 Threads

Base Clock 1.59GHz	Base Clock 1.59GHz
Overclocking Locked	Overclocking Locked

L1i 32KB	L1i 32KB
L1d 32KB	L1d 32KB
L2 2MB shared	L2 2MB shared
SLC Cache 1MB	SLC Cache 1MB

Type LPDDR4	Type LPDDR4
Max Memory 1GB	Max Memory 1GB
ECC No	ECC No
Channels 1	Channels 1
Bus Width 32-bit	Bus Width 32-bit
Speed 3200MT/s	Speed 3200MT/s
Bandwidth 12.8GB/s	Bandwidth 12.8GB/s
Bandwidth Calculator Channels Transfer Rate Calculated Bandwidth 12.8GB/s	Bandwidth Calculator Channels Transfer Rate Calculated Bandwidth 12.8GB/s

TDP

2W

TDP

2W

iGPU S4	iGPU S5
Shaders 64	Shaders 64
Boost Clock 562MHz	Boost Clock 562MHz
·· 71.94 GFLOPSFP16	·· 71.94 GFLOPSFP16

NPU Model H11 Mercury	NPU Model H11 Mercury
NPU Cores 2	NPU Cores 2
Performance 1.3 TOPSFP16	Performance 1.3 TOPSFP16

Manufacturer Apple	Manufacturer Apple
ISA AArch64	ISA AArch64
Architecture Apple Silicon 8ARMv8.3-A	Architecture Apple Silicon 8ARMv8.3-A
Family S Series	Family S Series
Branding	Branding
Codename TempestP-Core	Codename TempestP-Core
Market Segment Smartwatch	Market Segment Smartwatch
Release Date Sep 21, 2018	Release Date Sep 25, 2019

Foundry TSMC	Foundry TSMC
Fabrication Node N7	Fabrication Node N7
Die Size 38mm²	Die Size 38mm²

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