Intel Core i7-820QM vs Intel Core 2 Duo T7800

Comparative analysis of Intel Core i7-820QM and Intel Core 2 Duo T7800 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).

Intel Core i7-820QM

Intel Core 2 Duo T7800

Differences

Reasons to consider the Intel Core i7-820QM

CPU is newer: launch date 2 year(s) 1 month(s) later
2 more cores, run more applications at once: 4 vs 2
6 more threads: 8 vs 2
Around 18% higher clock speed: 3.06 GHz vs 2.6 GHz
A newer manufacturing process allows for a more powerful, yet cooler running processor: 45 nm vs 65 nm
4x more L1 cache, more data can be stored in the L1 cache for quick access later
Around 10% better performance in PassMark - Single thread mark: 1014 vs 918
Around 93% better performance in PassMark - CPU mark: 1775 vs 921
17.8x better performance in CompuBench 1.5 Desktop - Face Detection (mPixels/s): 4.276 vs 0.24
Around 9% better performance in CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s): 20.687 vs 18.982
3.4x better performance in CompuBench 1.5 Desktop - T-Rex (Frames/s): 0.267 vs 0.079

Specifications (specs)
Launch date	23 September 2009 vs 18 August 2007
Number of cores	4 vs 2
Number of threads	8 vs 2
Maximum frequency	3.06 GHz vs 2.6 GHz
Manufacturing process technology	45 nm vs 65 nm
L1 cache	256 KB vs 64 KB
Benchmarks
PassMark - Single thread mark	1014 vs 918
PassMark - CPU mark	1775 vs 921
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	4.276 vs 0.24
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	20.687 vs 18.982
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.267 vs 0.079

Reasons to consider the Intel Core 2 Duo T7800

4x more L2 cache, more data can be stored in the L2 cache for quick access later
Around 29% lower typical power consumption: 35 Watt vs 45 Watt
3.7x better performance in Geekbench 4 - Single Core: 1427 vs 381
Around 86% better performance in Geekbench 4 - Multi-Core: 2203 vs 1185

Specifications (specs)
L2 cache	4 MB vs 1024 KB
Thermal Design Power (TDP)	35 Watt vs 45 Watt
Benchmarks
Geekbench 4 - Single Core	1427 vs 381
Geekbench 4 - Multi-Core	2203 vs 1185

Compare benchmarks

CPU 1: Intel Core i7-820QM
CPU 2: Intel Core 2 Duo T7800

PassMark - Single thread mark

CPU 1

CPU 2

1014

918

PassMark - CPU mark

CPU 1

CPU 2

1775

921

Geekbench 4 - Single Core

CPU 1

CPU 2

381

1427

Geekbench 4 - Multi-Core

CPU 1

CPU 2

1185

2203

CompuBench 1.5 Desktop - Face Detection (mPixels/s)

CPU 1

CPU 2

4.276

0.24

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

CPU 1

CPU 2

20.687

18.982

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

CPU 1

CPU 2

0.267

0.079

Name	Intel Core i7-820QM	Intel Core 2 Duo T7800
PassMark - Single thread mark	1014	918
PassMark - CPU mark	1775	921
Geekbench 4 - Single Core	381	1427
Geekbench 4 - Multi-Core	1185	2203
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	4.276	0.24
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	20.687	18.982
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.267	0.079
CompuBench 1.5 Desktop - Video Composition (Frames/s)		0.408
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)		2.074

Compare specifications (specs)

	Intel Core i7-820QM	Intel Core 2 Duo T7800
Essentials
Architecture codename	Clarksfield	Merom
Launch date	23 September 2009	18 August 2007
Launch price (MSRP)	$546	$515
Place in performance rating	2815	2817
Price now	$139	$607.99
Processor Number	i7-820QM	T7800
Series	Legacy Intel® Core™ Processors	Legacy Intel® Core™ Processors
Status	Discontinued	Discontinued
Value for money (0-100)	6.84	0.78
Vertical segment	Mobile	Mobile
Performance
64 bit support
Base frequency	1.73 GHz	2.60 GHz
Bus Speed	2.5 GT/s DMI	800 MHz FSB
Die size	296 mm2	143 mm2
Front-side bus (FSB)	2500 MHz	800 MHz
L1 cache	256 KB	64 KB
L2 cache	1024 KB	4 MB
L3 cache	8196 KB
Manufacturing process technology	45 nm	65 nm
Maximum core temperature	100°C	100°C
Maximum frequency	3.06 GHz	2.6 GHz
Number of cores	4	2
Number of threads	8	2
Transistor count	774 million	291 million
VID voltage range		1.075V-1.250V
Memory
Max memory channels	2
Maximum memory bandwidth	21 GB/s
Maximum memory size	8 GB
Supported memory types	DDR3 1066/1333
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1	1
Package Size	37.5mm x 37.5mm	35mm x 35mm
Sockets supported	PGA988	PBGA479, PPGA478
Thermal Design Power (TDP)	45 Watt	35 Watt
Peripherals
Max number of PCIe lanes	16
PCI Express revision	2
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® Hyper-Threading technology
Intel® Turbo Boost technology
Intel® vPro™ Platform Eligibility
Physical Address Extensions (PAE)	36-bit
Thermal Monitoring
FSB parity
Intel® Demand Based Switching
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)