AMD Phenom II X4 840 vs AMD Athlon II X4 635

Comparative analysis of AMD Phenom II X4 840 and AMD Athlon II X4 635 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, 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 Phenom II X4 840

AMD Athlon II X4 635

Differences

Reasons to consider the AMD Phenom II X4 840

CPU is newer: launch date 1 year(s) 0 month(s) later
Around 10% higher clock speed: 3.2 GHz vs 2.9 GHz
Around 11% better performance in PassMark - Single thread mark: 1299 vs 1168
Around 8% better performance in PassMark - CPU mark: 2425 vs 2241
Around 10% better performance in Geekbench 4 - Single Core: 391 vs 357
Around 17% better performance in Geekbench 4 - Multi-Core: 1325 vs 1130
Around 2% better performance in CompuBench 1.5 Desktop - Face Detection (mPixels/s): 2.92 vs 2.875

Specifications (specs)
Launch date	January 2011 vs January 2010
Maximum frequency	3.2 GHz vs 2.9 GHz
Benchmarks
PassMark - Single thread mark	1299 vs 1168
PassMark - CPU mark	2425 vs 2241
Geekbench 4 - Single Core	391 vs 357
Geekbench 4 - Multi-Core	1325 vs 1130
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	2.92 vs 2.875

Reasons to consider the AMD Athlon II X4 635

Around 50% better performance in CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s): 13.354 vs 8.884
Around 33% better performance in CompuBench 1.5 Desktop - T-Rex (Frames/s): 0.211 vs 0.159

Benchmarks
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	13.354 vs 8.884
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.211 vs 0.159

Compare benchmarks

CPU 1: AMD Phenom II X4 840
CPU 2: AMD Athlon II X4 635

PassMark - Single thread mark

CPU 1

CPU 2

1299

1168

PassMark - CPU mark

CPU 1

CPU 2

2425

2241

Geekbench 4 - Single Core

CPU 1

CPU 2

391

357

Geekbench 4 - Multi-Core

CPU 1

CPU 2

1325

1130

CompuBench 1.5 Desktop - Face Detection (mPixels/s)

CPU 1

CPU 2

2.92

2.875

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

CPU 1

CPU 2

8.884

13.354

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

CPU 1

CPU 2

0.159

0.211

Name	AMD Phenom II X4 840	AMD Athlon II X4 635
PassMark - Single thread mark	1299	1168
PassMark - CPU mark	2425	2241
Geekbench 4 - Single Core	391	357
Geekbench 4 - Multi-Core	1325	1130
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	2.92	2.875
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	8.884	13.354
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.159	0.211
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	3.91

Compare specifications (specs)

	AMD Phenom II X4 840	AMD Athlon II X4 635
Essentials
Architecture codename	Propus	Propus
Family	AMD Phenom
Launch date	January 2011	January 2010
Launch price (MSRP)	$90	$70
OPN PIB	HDX840WFGMBOX
OPN Tray	HDX840WFK42GM
Place in performance rating	2870	2847
Price now	$89.95	$69.95
Series	AMD Phenom II X4
Value for money (0-100)	11.50	13.66
Vertical segment	Desktop	Desktop
Performance
64 bit support
Base frequency	3.2 GHz
Die size	169 mm	169 mm
L1 cache	512 KB	128 KB (per core)
L2 cache	2 MB	512 KB (per core)
Manufacturing process technology	45 nm	45 nm
Maximum core temperature	71°C
Maximum frequency	3.2 GHz	2.9 GHz
Number of cores	4	4
Number of threads	4
Transistor count	300 million	300 million
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	95 Watt