AMD Athlon II X4 645 vs Intel Core i7-875K

Comparative analysis of AMD Athlon II X4 645 and Intel Core i7-875K processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, 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).

AMD Athlon II X4 645

Intel Core i7-875K

Differences

Reasons to consider the AMD Athlon II X4 645

CPU is newer: launch date 4 month(s) later
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
2.3x better performance in CompuBench 1.5 Desktop - Face Detection (mPixels/s): 2.103 vs 0.925

Specifications (specs)
Launch date	September 2010 vs May 2010
L1 cache	128 KB (per core) vs 64 KB (per core)
L2 cache	512 KB (per core) vs 256 KB (per core)
Benchmarks
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	2.103 vs 0.925

Reasons to consider the Intel Core i7-875K

Processor is unlocked, an unlocked multiplier allows for easier overclocking
Around 16% higher clock speed: 3.60 GHz vs 3.1 GHz
Around 7% better performance in PassMark - Single thread mark: 1351 vs 1259
Around 32% better performance in PassMark - CPU mark: 3124 vs 2373
Around 51% better performance in Geekbench 4 - Single Core: 567 vs 375
Around 78% better performance in Geekbench 4 - Multi-Core: 2163 vs 1215
5.4x better performance in CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s): 51.608 vs 9.496

Specifications (specs)
Unlocked	Unlocked vs Locked
Maximum frequency	3.60 GHz vs 3.1 GHz
Benchmarks
PassMark - Single thread mark	1351 vs 1259
PassMark - CPU mark	3124 vs 2373
Geekbench 4 - Single Core	567 vs 375
Geekbench 4 - Multi-Core	2163 vs 1215
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	51.608 vs 9.496

Compare benchmarks

CPU 1: AMD Athlon II X4 645
CPU 2: Intel Core i7-875K

PassMark - Single thread mark

CPU 1

CPU 2

1259

1351

PassMark - CPU mark

CPU 1

CPU 2

2373

3124

Geekbench 4 - Single Core

CPU 1

CPU 2

375

567

Geekbench 4 - Multi-Core

CPU 1

CPU 2

1215

2163

CompuBench 1.5 Desktop - Face Detection (mPixels/s)

CPU 1

CPU 2

2.103

0.925

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

CPU 1

CPU 2

9.496

51.608

Name	AMD Athlon II X4 645	Intel Core i7-875K
PassMark - Single thread mark	1259	1351
PassMark - CPU mark	2373	3124
Geekbench 4 - Single Core	375	567
Geekbench 4 - Multi-Core	1215	2163
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	2.103	0.925
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	9.496	51.608
CompuBench 1.5 Desktop - T-Rex (Frames/s)		0.35
CompuBench 1.5 Desktop - Video Composition (Frames/s)		1.146
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)		4.459

Compare specifications (specs)

	AMD Athlon II X4 645	Intel Core i7-875K
Essentials
Architecture codename	Propus	Lynnfield
Launch date	September 2010	May 2010
Launch price (MSRP)	$80	$486
Place in performance rating	2786	2724
Price now	$49.99	$485.01
Value for money (0-100)	20.48	3.30
Vertical segment	Desktop	Desktop
Processor Number		i7-875K
Series		Legacy Intel® Core™ Processors
Status		Discontinued
Performance
64 bit support
Die size	169 mm	296 mm2
L1 cache	128 KB (per core)	64 KB (per core)
L2 cache	512 KB (per core)	256 KB (per core)
Manufacturing process technology	45 nm	45 nm
Maximum frequency	3.1 GHz	3.60 GHz
Number of cores	4	4
Transistor count	300 million	774 million
Base frequency		2.93 GHz
Bus Speed		2.5 GT/s DMI
L3 cache		8192 KB (shared)
Maximum core temperature		72.7°C
Number of threads		8
Unlocked
VID voltage range		0.6500V-1.4000V
Memory
Supported memory types	DDR3	DDR3 1066/1333
Max memory channels		2
Maximum memory bandwidth		21 GB/s
Maximum memory size		16 GB
Compatibility
Max number of CPUs in a configuration	1	1
Sockets supported	AM3	LGA1156
Thermal Design Power (TDP)	95 Watt	95 Watt
Low Halogen Options Available
Package Size		37.5mm x 37.5mm
Peripherals
Max number of PCIe lanes		16
PCI Express revision		2.0
PCIe configurations		1x16, 2x8
Security & Reliability
Execute Disable Bit (EDB)
Intel® Trusted Execution technology (TXT)
Advanced Technologies
Enhanced Intel SpeedStep® technology
Idle States
Instruction set extensions		Intel® SSE4.2
Intel 64
Intel® AES New Instructions
Intel® Demand Based Switching
Intel® Hyper-Threading technology
Intel® Turbo Boost technology
Intel® vPro™ Platform Eligibility
Physical Address Extensions (PAE)		36-bit
Thermal Monitoring
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® VT-x with Extended Page Tables (EPT)