AMD A8-3870K vs AMD Phenom II X4 820

Comparative analysis of AMD A8-3870K and AMD Phenom II X4 820 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core, CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s), GFXBench 4.0 - Car Chase Offscreen (Frames), GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - Car Chase Offscreen (Fps), GFXBench 4.0 - Manhattan (Fps).

AMD A8-3870K

AMD Phenom II X4 820

Differences

Reasons to consider the AMD A8-3870K

CPU is newer: launch date 2 year(s) 2 month(s) later
Processor is unlocked, an unlocked multiplier allows for easier overclocking
Around 7% higher clock speed: 3 GHz vs 2.8 GHz
A newer manufacturing process allows for a more powerful, yet cooler running processor: 32 nm vs 45 nm
2x more L2 cache, more data can be stored in the L2 cache for quick access later
Around 8% better performance in PassMark - Single thread mark: 1207 vs 1119
Around 10% better performance in PassMark - CPU mark: 2302 vs 2086
Around 2% better performance in Geekbench 4 - Single Core: 373 vs 364
Around 7% better performance in Geekbench 4 - Multi-Core: 1172 vs 1098

Specifications (specs)
Launch date	December 2011 vs September 2009
Unlocked	Unlocked vs Locked
Maximum frequency	3 GHz vs 2.8 GHz
Manufacturing process technology	32 nm vs 45 nm
L2 cache	1024 KB (per core) vs 512 KB (per core)
Benchmarks
PassMark - Single thread mark	1207 vs 1119
PassMark - CPU mark	2302 vs 2086
Geekbench 4 - Single Core	373 vs 364
Geekbench 4 - Multi-Core	1172 vs 1098

Reasons to consider the AMD Phenom II X4 820

Around 5% lower typical power consumption: 95 Watt vs 100 Watt

Thermal Design Power (TDP)	95 Watt vs 100 Watt

Compare benchmarks

CPU 1: AMD A8-3870K
CPU 2: AMD Phenom II X4 820

PassMark - Single thread mark

CPU 1

CPU 2

1207

1119

PassMark - CPU mark

CPU 1

CPU 2

2302

2086

Geekbench 4 - Single Core

CPU 1

CPU 2

373

364

Geekbench 4 - Multi-Core

CPU 1

CPU 2

1172

1098

Name	AMD A8-3870K	AMD Phenom II X4 820
PassMark - Single thread mark	1207	1119
PassMark - CPU mark	2302	2086
Geekbench 4 - Single Core	373	364
Geekbench 4 - Multi-Core	1172	1098
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	2.914
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	9.482
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.191
CompuBench 1.5 Desktop - Video Composition (Frames/s)	0.4
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	3.344
GFXBench 4.0 - Car Chase Offscreen (Frames)	762
GFXBench 4.0 - Manhattan (Frames)	1721
GFXBench 4.0 - Car Chase Offscreen (Fps)	762
GFXBench 4.0 - Manhattan (Fps)	1721

Compare specifications (specs)

	AMD A8-3870K	AMD Phenom II X4 820
Essentials
Architecture codename	Llano	Deneb
Launch date	December 2011	September 2009
Place in performance rating	2466	2469
Vertical segment	Desktop	Desktop
Launch price (MSRP)		$90
Price now		$74.95
Value for money (0-100)		13.36
Performance
64 bit support
Die size	228 mm	258 mm
L1 cache	128 KB (per core)	128 KB (per core)
L2 cache	1024 KB (per core)	512 KB (per core)
Manufacturing process technology	32 nm	45 nm
Maximum frequency	3 GHz	2.8 GHz
Number of cores	4	4
Transistor count	1178 million	758 million
Unlocked
L3 cache		4096 KB (shared)
Memory
Supported memory types	DDR3	DDR3
Compatibility
Max number of CPUs in a configuration	1	1
Sockets supported	FM1	AM3
Thermal Design Power (TDP)	100 Watt	95 Watt
Virtualization
AMD Virtualization (AMD-V™)