AMD Athlon X4 845 vs AMD Phenom II X4 975 BE

Comparative analysis of AMD Athlon X4 845 and AMD Phenom II X4 975 BE processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals, Advanced Technologies. 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 - Bitcoin Mining (mHash/s).

AMD Athlon X4 845

AMD Phenom II X4 975 BE

Differences

Reasons to consider the AMD Athlon X4 845

Around 6% higher clock speed: 3.8 GHz vs 3.6 GHz
Around 15% higher maximum core temperature: 71.30°C vs 62°C
A newer manufacturing process allows for a more powerful, yet cooler running processor: 28 nm vs 45 nm SOI
Around 24% better performance in PassMark - Single thread mark: 1678 vs 1350
Around 50% better performance in PassMark - CPU mark: 3799 vs 2536
Around 8% better performance in Geekbench 4 - Single Core: 516 vs 477
Around 38% better performance in CompuBench 1.5 Desktop - Face Detection (mPixels/s): 3.853 vs 2.787

Specifications (specs)
Maximum frequency	3.8 GHz vs 3.6 GHz
Maximum core temperature	71.30°C vs 62°C
Manufacturing process technology	28 nm vs 45 nm SOI
Benchmarks
PassMark - Single thread mark	1678 vs 1350
PassMark - CPU mark	3799 vs 2536
Geekbench 4 - Single Core	516 vs 477
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	3.853 vs 2.787

Reasons to consider the AMD Phenom II X4 975 BE

Processor is unlocked, an unlocked multiplier allows for easier overclocking
Around 2% better performance in Geekbench 4 - Multi-Core: 1584 vs 1548
Around 10% better performance in CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s): 13.167 vs 11.946

Specifications (specs)
Unlocked	Unlocked vs Locked
Benchmarks
Geekbench 4 - Multi-Core	1584 vs 1548
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	13.167 vs 11.946

Compare benchmarks

CPU 1: AMD Athlon X4 845
CPU 2: AMD Phenom II X4 975 BE

PassMark - Single thread mark

CPU 1

CPU 2

1678

1350

PassMark - CPU mark

CPU 1

CPU 2

3799

2536

Geekbench 4 - Single Core

CPU 1

CPU 2

516

477

Geekbench 4 - Multi-Core

CPU 1

CPU 2

1548

1584

CompuBench 1.5 Desktop - Face Detection (mPixels/s)

CPU 1

CPU 2

3.853

2.787

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

CPU 1

CPU 2

11.946

13.167

Name	AMD Athlon X4 845	AMD Phenom II X4 975 BE
PassMark - Single thread mark	1678	1350
PassMark - CPU mark	3799	2536
Geekbench 4 - Single Core	516	477
Geekbench 4 - Multi-Core	1548	1584
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	3.853	2.787
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	11.946	13.167
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.244
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	4.237

Compare specifications (specs)

	AMD Athlon X4 845	AMD Phenom II X4 975 BE
Essentials
Family	AMD Athlon Processors	AMD Phenom
OPN PIB	AD845XACKASBX	HDZ975FBGMBOX
Place in performance rating	2631	2635
Series	AMD Athlon X4	AMD Phenom II X4 Black
Vertical segment	Desktop	Desktop
Architecture codename		Deneb
Launch date		January 2011
OPN Tray		HDZ975FBK4DGM
Performance
Base frequency	3.5 GHz	3.6 GHz
L2 cache	2 MB	2 MB
Manufacturing process technology	28 nm	45 nm SOI
Maximum core temperature	71.30°C	62°C
Maximum frequency	3.8 GHz	3.6 GHz
Number of cores	4	4
Number of threads	4	4
Unlocked
64 bit support
Die size		258 mm
L1 cache		512 KB
L3 cache		6 MB
Transistor count		758 million
Memory
Max memory channels	2
Supported memory frequency	2133 MHz
Supported memory types	DDR3	DDR3
Compatibility
Sockets supported	FM2+	AM3
Thermal Solution	Near Silent 95W
Max number of CPUs in a configuration		1
Thermal Design Power (TDP)		125 Watt
Peripherals
PCI Express revision	3.0
Advanced Technologies
Fused Multiply-Add 4 (FMA4)
Intel® Advanced Vector Extensions (AVX)
Intel® AES New Instructions