Intel Pentium G645 vs Intel Core i7-975

Comparative analysis of Intel Pentium G645 and Intel Core i7-975 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Graphics, Graphics interfaces, 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 - Bitcoin Mining (mHash/s), 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).

Intel Pentium G645

Intel Core i7-975

Differences

Reasons to consider the Intel Pentium G645

CPU is newer: launch date 3 year(s) 3 month(s) later
Around 2% higher maximum core temperature: 69.1°C vs 67.9°C
A newer manufacturing process allows for a more powerful, yet cooler running processor: 32 nm vs 45 nm
Around 33% higher maximum memory size: 32 GB vs 24 GB
2x lower typical power consumption: 65 Watt vs 130 Watt

Launch date	September 2012 vs June 2009
Maximum core temperature	69.1°C vs 67.9°C
Manufacturing process technology	32 nm vs 45 nm
Maximum memory size	32 GB vs 24 GB
Thermal Design Power (TDP)	65 Watt vs 130 Watt

Reasons to consider the Intel Core i7-975

Processor is unlocked, an unlocked multiplier allows for easier overclocking
2 more cores, run more applications at once: 4 vs 2
6 more threads: 8 vs 2
Around 24% higher clock speed: 3.60 GHz vs 2.9 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
2.7x more L3 cache, more data can be stored in the L3 cache for quick access later
Around 12% better performance in PassMark - Single thread mark: 1500 vs 1340
2.4x better performance in PassMark - CPU mark: 3494 vs 1428
Around 24% better performance in Geekbench 4 - Single Core: 606 vs 489
2.7x better performance in Geekbench 4 - Multi-Core: 2380 vs 878
2.9x better performance in CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s): 5.196 vs 1.806

Specifications (specs)
Unlocked	Unlocked vs Locked
Number of cores	4 vs 2
Number of threads	8 vs 2
Maximum frequency	3.60 GHz vs 2.9 GHz
L1 cache	64 KB (per core) vs 64 KB (per core)
L2 cache	256 KB (per core) vs 256 KB (per core)
L3 cache	8192 KB (shared) vs 3072 KB (shared)
Benchmarks
PassMark - Single thread mark	1500 vs 1340
PassMark - CPU mark	3494 vs 1428
Geekbench 4 - Single Core	606 vs 489
Geekbench 4 - Multi-Core	2380 vs 878
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	5.196 vs 1.806

Compare benchmarks

CPU 1: Intel Pentium G645
CPU 2: Intel Core i7-975

PassMark - Single thread mark

CPU 1

CPU 2

1340

1500

PassMark - CPU mark

CPU 1

CPU 2

1428

3494

Geekbench 4 - Single Core

CPU 1

CPU 2

489

606

Geekbench 4 - Multi-Core

CPU 1

CPU 2

878

2380

CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)

CPU 1

CPU 2

1.806

5.196

Name	Intel Pentium G645	Intel Core i7-975
PassMark - Single thread mark	1340	1500
PassMark - CPU mark	1428	3494
Geekbench 4 - Single Core	489	606
Geekbench 4 - Multi-Core	878	2380
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	1.806	5.196
CompuBench 1.5 Desktop - Face Detection (mPixels/s)		1.084
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)		63.217
CompuBench 1.5 Desktop - T-Rex (Frames/s)		0.376
CompuBench 1.5 Desktop - Video Composition (Frames/s)		1.858

Compare specifications (specs)

	Intel Pentium G645	Intel Core i7-975
Essentials
Architecture codename	Sandy Bridge	Bloomfield
Launch date	September 2012	June 2009
Launch price (MSRP)	$80	$476
Place in performance rating	2595	2589
Price now	$95	$179.99
Processor Number	G645	i7-975
Series	Legacy Intel® Pentium® Processor	Legacy Intel® Core™ Processors
Status	Discontinued	Discontinued
Value for money (0-100)	8.01	10.04
Vertical segment	Desktop	Desktop
Performance
64 bit support
Base frequency	2.90 GHz	3.33 GHz
Bus Speed	5 GT/s DMI	6.4 GT/s QPI
Die size	131 mm	263 mm2
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	3072 KB (shared)	8192 KB (shared)
Manufacturing process technology	32 nm	45 nm
Maximum core temperature	69.1°C	67.9°C
Maximum frequency	2.9 GHz	3.60 GHz
Number of cores	2	4
Number of threads	2	8
Transistor count	504 million	731 million
Front-side bus (FSB)		1333 MHz
Number of QPI Links		1
Unlocked
VID voltage range		0.800V-1.375V
Memory
Max memory channels	2	3
Maximum memory bandwidth	17 GB/s	25.6 GB/s
Maximum memory size	32 GB	24 GB
Supported memory types	DDR3 1066	DDR3 800/1066
Graphics
Graphics base frequency	850 MHz
Graphics max dynamic frequency	1.10 GHz
Graphics max frequency	1.1 GHz
Intel® Clear Video HD technology
Intel® Flexible Display Interface (Intel® FDI)
Intel® InTru™ 3D technology
Intel® Quick Sync Video
Processor graphics	Intel HD Graphics
Graphics interfaces
Number of displays supported	2
Wireless Display (WiDi) support
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1	1
Package Size	37.5mm x 37.5mm	42.5mm x 45.0mm
Sockets supported	FCLGA1155	FCLGA1366
Thermal Design Power (TDP)	65 Watt	130 Watt
Peripherals
PCI Express revision	2.0
Security & Reliability
Execute Disable Bit (EDB)
Intel® Trusted Execution technology (TXT)
Advanced Technologies
Enhanced Intel SpeedStep® technology
Flexible Display interface (FDI)
Idle States
Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	Intel® SSE4.2
Intel 64
Intel® Advanced Vector Extensions (AVX)
Intel® AES New Instructions
Intel® Fast Memory Access
Intel® Flex Memory Access
Intel® Hyper-Threading technology
Intel® Optane™ Memory Supported
Intel® Turbo Boost technology
Intel® vPro™ Platform Eligibility
Thermal Monitoring
Intel® Demand Based Switching
Physical Address Extensions (PAE)		36-bit
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)