Intel Core 2 Quad Q6600 (95W) vs Intel Pentium D 820

Comparative analysis of Intel Core 2 Quad Q6600 (95W) and Intel Pentium D 820 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: 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), Geekbench 4 - Single Core, Geekbench 4 - Multi-Core.

Intel Core 2 Quad Q6600 (95W)

Intel Pentium D 820

Differences

Reasons to consider the Intel Core 2 Quad Q6600 (95W)

CPU is newer: launch date 2 year(s) 2 month(s) later
2 more cores, run more applications at once: 4 vs 2
A newer manufacturing process allows for a more powerful, yet cooler running processor: 65 nm vs 90 nm
9.1x more L1 cache, more data can be stored in the L1 cache for quick access later
4x more L2 cache, more data can be stored in the L2 cache for quick access later

Launch date	July 2007 vs May 2005
Number of cores	4 vs 2
Manufacturing process technology	65 nm vs 90 nm
L1 cache	256 KB vs 28 KB
L2 cache	8192 KB vs 2048 KB

Reasons to consider the Intel Pentium D 820

Around 17% higher clock speed: 2.8 GHz vs 2.4 GHz

Maximum frequency	2.8 GHz vs 2.4 GHz
Max number of CPUs in a configuration	2 vs 1

Compare benchmarks

CPU 1: Intel Core 2 Quad Q6600 (95W)
CPU 2: Intel Pentium D 820

Name	Intel Core 2 Quad Q6600 (95W)	Intel Pentium D 820
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	0.522
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	24.255
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.138
CompuBench 1.5 Desktop - Video Composition (Frames/s)	0.748
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	3.829
Geekbench 4 - Single Core		179
Geekbench 4 - Multi-Core		307

Compare specifications (specs)

	Intel Core 2 Quad Q6600 (95W)	Intel Pentium D 820
Essentials
Architecture codename	Kentsfield	Smithfield
Launch date	July 2007	May 2005
Place in performance rating	3296	3292
Vertical segment	Desktop	Desktop
Processor Number		820
Series		Legacy Intel® Pentium® Processor
Status		Discontinued
Performance
64 bit support
Die size	2x 143 mm	206 mm2
L1 cache	256 KB	28 KB
L2 cache	8192 KB	2048 KB
Manufacturing process technology	65 nm	90 nm
Maximum case temperature (TCase)	62 °C
Maximum frequency	2.4 GHz	2.8 GHz
Number of cores	4	2
Transistor count	582 million	230 million
Base frequency		2.80 GHz
Bus Speed		800 MHz FSB
Front-side bus (FSB)		800 MHz
Maximum core temperature		64.1°C
Number of threads		2
VID voltage range		1.200V-1.400V
Memory
Supported memory types	DDR1, DDR2, DDR3	DDR1, DDR2, DDR3
Compatibility
Max number of CPUs in a configuration	1	2
Sockets supported	775	PLGA775
Thermal Design Power (TDP)	95 Watt	95 Watt
Low Halogen Options Available
Package Size		37.5mm x 37.5mm
Security & Reliability
Execute Disable Bit (EDB)
Intel® Trusted Execution technology (TXT)
Advanced Technologies
Enhanced Intel SpeedStep® technology
FSB parity
Idle States
Intel 64
Intel® AES New Instructions
Intel® Demand Based Switching
Intel® Hyper-Threading technology
Intel® Turbo Boost technology
Physical Address Extensions (PAE)		32-bit
Thermal Monitoring
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)