AMD Phenom X4 B99 vs AMD Athlon 64 X2 6400+ BE

Comparative analysis of AMD Phenom X4 B99 and AMD Athlon 64 X2 6400+ BE processors for all known characteristics in the following categories: Essentials, Performance, Compatibility. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core.

AMD Phenom X4 B99

AMD Athlon 64 X2 6400+ BE

Differences

Reasons to consider the AMD Phenom X4 B99

2 more cores, run more applications at once: 4 vs 2
2x more L2 cache, more data can be stored in the L2 cache for quick access later
Around 32% lower typical power consumption: 95 Watt vs 125 Watt
Around 21% better performance in PassMark - Single thread mark: 1377 vs 1141
2.5x better performance in PassMark - CPU mark: 2536 vs 998

Specifications (specs)
Number of cores	4 vs 2
L2 cache	2 MB vs 1024 KB
Thermal Design Power (TDP)	95 Watt vs 125 Watt
Benchmarks
PassMark - Single thread mark	1377 vs 1141
PassMark - CPU mark	2536 vs 998

Compare benchmarks

CPU 1: AMD Phenom X4 B99
CPU 2: AMD Athlon 64 X2 6400+ BE

PassMark - Single thread mark

CPU 1

CPU 2

1377

1141

PassMark - CPU mark

CPU 1

CPU 2

2536

998

Name	AMD Phenom X4 B99	AMD Athlon 64 X2 6400+ BE
PassMark - Single thread mark	1377	1141
PassMark - CPU mark	2536	998
Geekbench 4 - Single Core		1531
Geekbench 4 - Multi-Core		2453

Compare specifications (specs)

	AMD Phenom X4 B99	AMD Athlon 64 X2 6400+ BE
Essentials
Family	AMD Phenom
OPN Tray	HDXB99WFK4DGM
Place in performance rating	1823	1837
Series	AMD Business Class - AMD Phenom X4 Quad-Core
Vertical segment	Desktop	Desktop
Architecture codename		Windsor
Launch date		August 2007
Performance
Base frequency	3.3 GHz
L2 cache	2 MB	1024 KB
Number of cores	4	2
Number of threads	4
Unlocked
64 bit support
Die size		230 mm
L1 cache		256 KB
Manufacturing process technology		90 nm
Maximum frequency		3.2 GHz
Transistor count		227 million
Compatibility
Sockets supported	AM3	AM2
Thermal Design Power (TDP)	95 Watt	125 Watt
Max number of CPUs in a configuration		1