Apple S5 vs Apple S8 Full Specs - HMC

2 Cores 2 Threads 1.59GHz	2 Cores 2 Threads 1.73GHz
TDP 2W	TDP 2W
Bandwidth 12.8GB/s LPDDR4	Bandwidth 12.8GB/s LPDDR4
iGPU S5	iGPU S8
·· 71.94 GFLOPSFP16	·· 86.4 GFLOPSFP16

S512.8GB/s

x1

S812.8GB/s

x1

2 Cores	2 Cores
2 Threads	2 Threads

Base Clock 1.59GHz	Base Clock 1.73GHz
Overclocking Locked	Overclocking Locked

L1i 32KB	L1i 96KB
L1d 32KB	L1d 48KB
L2 2MB shared	L2 4MB shared
SLC Cache 1MB	SLC Cache 1MB

Type LPDDR4	Type LPDDR4
Max Memory 1GB	Max Memory 1.5GB
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 S5	iGPU S8
Shaders 64	Shaders 64
Boost Clock 562MHz	Boost Clock 675MHz
·· 71.94 GFLOPSFP16	·· 86.4 GFLOPSFP16

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

Manufacturer Apple	Manufacturer Apple
ISA AArch64	ISA AArch64
Architecture Apple Silicon 8ARMv8.3-A	Architecture Apple Silicon 9ARMv8.4-A
Family S Series	Family S Series
Branding	Branding
Codename - TempestP-Core	Codename Turks ThunderP-Core
Market Segment Smartwatch	Market Segment Smartwatch
Release Date Sep 25, 2019	Release Date Sep 16, 2022

Foundry TSMC	Foundry TSMC
Fabrication Node N7	Fabrication Node N7P
Die Size 38mm²	Die Size 40mm²
Transistor Count -	Transistor Count 3.5 Billion
Transistor Density -	Transistor Density 88 MTr/mm²

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Smartwatches

Apple Watch Series 5(40mm)Apple Watch Series 5(44mm)Apple Watch Series 5 SS(40mm)

Smartwatches

Apple Watch Series 8(41mm)Apple Watch Series 8(45mm)Apple Watch Series 8 SS(41mm)