AMD Athlon II X4 640 vs AMD Phenom II X2 555 BE

Comparative analysis of AMD Athlon II X4 640 and AMD Phenom II X2 555 BE processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core, 3DMark Fire Strike - Physics Score, 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 - Bitcoin Mining (mHash/s), CompuBench 1.5 Desktop - Video Composition (Frames/s).

AMD Athlon II X4 640

AMD Phenom II X2 555 BE

Differences

Reasons to consider the AMD Athlon II X4 640

CPU is newer: launch date 3 month(s) later
2 more cores, run more applications at once: 4 vs 2
2x more L1 cache, more data can be stored in the L1 cache for quick access later
2x more L2 cache, more data can be stored in the L2 cache for quick access later
Around 73% better performance in PassMark - CPU mark: 2245 vs 1296
Around 56% better performance in Geekbench 4 - Multi-Core: 1191 vs 762
Around 23% better performance in CompuBench 1.5 Desktop - Face Detection (mPixels/s): 2.776 vs 2.25
Around 31% better performance in CompuBench 1.5 Desktop - T-Rex (Frames/s): 0.17 vs 0.13
Around 76% better performance in CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s): 4.052 vs 2.308

Specifications (specs)
Launch date	May 2010 vs January 2010
Number of cores	4 vs 2
L1 cache	128 KB (per core) vs 128 KB (per core)
L2 cache	512 KB (per core) vs 512 KB (per core)
Benchmarks
PassMark - CPU mark	2245 vs 1296
Geekbench 4 - Multi-Core	1191 vs 762
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	2.776 vs 2.25
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.17 vs 0.13
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	4.052 vs 2.308

Reasons to consider the AMD Phenom II X2 555 BE

Processor is unlocked, an unlocked multiplier allows for easier overclocking
Around 7% higher clock speed: 3.2 GHz vs 3 GHz
Around 19% lower typical power consumption: 80 Watt vs 95 Watt
Around 8% better performance in PassMark - Single thread mark: 1307 vs 1211
Around 15% better performance in Geekbench 4 - Single Core: 411 vs 358
Around 27% better performance in CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s): 9.709 vs 7.618

Specifications (specs)
Unlocked	Unlocked vs Locked
Maximum frequency	3.2 GHz vs 3 GHz
Thermal Design Power (TDP)	80 Watt vs 95 Watt
Benchmarks
PassMark - Single thread mark	1307 vs 1211
Geekbench 4 - Single Core	411 vs 358
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	9.709 vs 7.618

Compare benchmarks

CPU 1: AMD Athlon II X4 640
CPU 2: AMD Phenom II X2 555 BE

PassMark - Single thread mark

CPU 1

CPU 2

1211

1307

PassMark - CPU mark

CPU 1

CPU 2

2245

1296

Geekbench 4 - Single Core

CPU 1

CPU 2

358

411

Geekbench 4 - Multi-Core

CPU 1

CPU 2

1191

762

CompuBench 1.5 Desktop - Face Detection (mPixels/s)

CPU 1

CPU 2

2.776

2.25

CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)

CPU 1

CPU 2

7.618

9.709

CompuBench 1.5 Desktop - T-Rex (Frames/s)

CPU 1

CPU 2

0.17

0.13

CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)

CPU 1

CPU 2

4.052

2.308

Name	AMD Athlon II X4 640	AMD Phenom II X2 555 BE
PassMark - Single thread mark	1211	1307
PassMark - CPU mark	2245	1296
Geekbench 4 - Single Core	358	411
Geekbench 4 - Multi-Core	1191	762
3DMark Fire Strike - Physics Score	0
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	2.776	2.25
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	7.618	9.709
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.17	0.13
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	4.052	2.308
CompuBench 1.5 Desktop - Video Composition (Frames/s)		0.213

Compare specifications (specs)

	AMD Athlon II X4 640	AMD Phenom II X2 555 BE
Essentials
Architecture codename	Propus	Callisto
Launch date	May 2010	January 2010
Launch price (MSRP)	$80
Place in performance rating	3023	3036
Price now	$239.95
Value for money (0-100)	4.07
Vertical segment	Desktop	Desktop
Performance
64 bit support
Die size	169 mm	258 mm
L1 cache	128 KB (per core)	128 KB (per core)
L2 cache	512 KB (per core)	512 KB (per core)
Manufacturing process technology	45 nm	45 nm
Maximum frequency	3 GHz	3.2 GHz
Number of cores	4	2
Transistor count	300 million	758 million
L3 cache		6144 KB (shared)
Unlocked
Memory
Supported memory types	DDR3	DDR3
Compatibility
Max number of CPUs in a configuration	1	1
Sockets supported	AM3	AM3
Thermal Design Power (TDP)	95 Watt	80 Watt