AMD Athlon II X4 645 vs Intel Core i7-920

Comparative analysis of AMD Athlon II X4 645 and Intel Core i7-920 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, 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), 3DMark Fire Strike - Physics Score, 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 i7-920

Differences

Reasons to consider the AMD Athlon II X4 645

CPU is newer: launch date 1 year(s) 10 month(s) later
Around 6% higher clock speed: 3.1 GHz vs 2.93 GHz
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 37% lower typical power consumption: 95 Watt vs 130 Watt
Around 4% better performance in PassMark - Single thread mark: 1259 vs 1213
2.4x better performance in CompuBench 1.5 Desktop - Face Detection (mPixels/s): 2.103 vs 0.873

Specifications (specs)
Launch date	September 2010 vs November 2008
Maximum frequency	3.1 GHz vs 2.93 GHz
L1 cache	128 KB (per core) vs 64 KB (per core)
L2 cache	512 KB (per core) vs 256 KB (per core)
Thermal Design Power (TDP)	95 Watt vs 130 Watt
Benchmarks
PassMark - Single thread mark	1259 vs 1213
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	2.103 vs 0.873

Reasons to consider the Intel Core i7-920

Around 20% better performance in PassMark - CPU mark: 2846 vs 2373
Around 25% better performance in Geekbench 4 - Single Core: 469 vs 375
Around 53% better performance in Geekbench 4 - Multi-Core: 1855 vs 1215
5.3x better performance in CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s): 50.388 vs 9.496

Benchmarks
PassMark - CPU mark	2846 vs 2373
Geekbench 4 - Single Core	469 vs 375
Geekbench 4 - Multi-Core	1855 vs 1215
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	50.388 vs 9.496

Compare benchmarks

CPU 1: AMD Athlon II X4 645
CPU 2: Intel Core i7-920

PassMark - Single thread mark

CPU 1

CPU 2

1259

1213

PassMark - CPU mark

CPU 1

CPU 2

2373

2846

Geekbench 4 - Single Core

CPU 1

CPU 2

375

469

Geekbench 4 - Multi-Core

CPU 1

CPU 2

1215

1855

CompuBench 1.5 Desktop - Face Detection (mPixels/s)

CPU 1

CPU 2

2.103

0.873

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

CPU 1

CPU 2

9.496

50.388

Name	AMD Athlon II X4 645	Intel Core i7-920
PassMark - Single thread mark	1259	1213
PassMark - CPU mark	2373	2846
Geekbench 4 - Single Core	375	469
Geekbench 4 - Multi-Core	1215	1855
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	2.103	0.873
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	9.496	50.388
3DMark Fire Strike - Physics Score		2227
CompuBench 1.5 Desktop - T-Rex (Frames/s)		0.3
CompuBench 1.5 Desktop - Video Composition (Frames/s)		1.595
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)		4

Compare specifications (specs)

	AMD Athlon II X4 645	Intel Core i7-920
Essentials
Architecture codename	Propus	Bloomfield
Launch date	September 2010	November 2008
Launch price (MSRP)	$80	$340
Place in performance rating	2786	2773
Price now	$49.99	$174
Value for money (0-100)	20.48	8.34
Vertical segment	Desktop	Desktop
Processor Number		i7-920
Series		Legacy Intel® Core™ Processors
Status		Discontinued
Performance
64 bit support
Die size	169 mm	263 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	2.93 GHz
Number of cores	4	4
Transistor count	300 million	731 million
Base frequency		2.66 GHz
Bus Speed		4.8 GT/s QPI
Front-side bus (FSB)		1333 MHz
L3 cache		8192 KB (shared)
Maximum core temperature		67.9°C
Number of QPI Links		1
Number of threads		8
VID voltage range		0.800V-1.375V
Memory
Supported memory types	DDR3	DDR3 800/1066
Max memory channels		3
Maximum memory bandwidth		25.6 GB/s
Maximum memory size		24 GB
Compatibility
Max number of CPUs in a configuration	1	1
Sockets supported	AM3	FCLGA1366
Thermal Design Power (TDP)	95 Watt	130 Watt
Low Halogen Options Available
Package Size		42.5mm x 45.0mm
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
Physical Address Extensions (PAE)		36-bit
Thermal Monitoring
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® VT-x with Extended Page Tables (EPT)