Intel Core 2 Quad Q8400 vs Intel Pentium D 945

Comparative analysis of Intel Core 2 Quad Q8400 and Intel Pentium D 945 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), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s), CompuBench 1.5 Desktop - T-Rex (Frames/s).

Intel Core 2 Quad Q8400

Intel Pentium D 945

Differences

Reasons to consider the Intel Core 2 Quad Q8400

CPU is newer: launch date 2 year(s) 9 month(s) later
2 more cores, run more applications at once: 4 vs 2
Around 13% higher maximum core temperature: 71.4°C vs 63.4°C
A newer manufacturing process allows for a more powerful, yet cooler running processor: 45 nm vs 65 nm
9.1x more L1 cache, more data can be stored in the L1 cache for quick access later
Around 65% better performance in Geekbench 4 - Single Core: 362 vs 220
2.9x better performance in Geekbench 4 - Multi-Core: 1139 vs 389

Specifications (specs)
Launch date	April 2009 vs July 2006
Number of cores	4 vs 2
Maximum core temperature	71.4°C vs 63.4°C
Manufacturing process technology	45 nm vs 65 nm
L1 cache	256 KB vs 28 KB
Benchmarks
Geekbench 4 - Single Core	362 vs 220
Geekbench 4 - Multi-Core	1139 vs 389

Reasons to consider the Intel Pentium D 945

Around 27% higher clock speed: 3.4 GHz vs 2.67 GHz

Maximum frequency	3.4 GHz vs 2.67 GHz
Max number of CPUs in a configuration	2 vs 1

Compare benchmarks

CPU 1: Intel Core 2 Quad Q8400
CPU 2: Intel Pentium D 945

Geekbench 4 - Single Core

CPU 1

CPU 2

362

220

Geekbench 4 - Multi-Core

CPU 1

CPU 2

1139

389

Name	Intel Core 2 Quad Q8400	Intel Pentium D 945
PassMark - Single thread mark	1141
PassMark - CPU mark	2068
Geekbench 4 - Single Core	362	220
Geekbench 4 - Multi-Core	1139	389
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	0.609
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	20.494
CompuBench 1.5 Desktop - Video Composition (Frames/s)	1.4
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	4.93
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.171

Compare specifications (specs)

	Intel Core 2 Quad Q8400	Intel Pentium D 945
Essentials
Architecture codename	Yorkfield	Presler
Launch date	April 2009	July 2006
Place in performance rating	3019	3281
Price now	$99.50
Processor Number	Q8400	945
Series	Legacy Intel® Core™ Processors	Legacy Intel® Pentium® Processor
Status	Discontinued	Discontinued
Value for money (0-100)	9.38
Vertical segment	Desktop	Desktop
Performance
64 bit support
Base frequency	2.66 GHz	3.40 GHz
Bus Speed	1333 MHz FSB	800 MHz FSB
Die size	164 mm2	162 mm2
L1 cache	256 KB	28 KB
L2 cache	4096 KB	4096 KB
Manufacturing process technology	45 nm	65 nm
Maximum case temperature (TCase)	71 °C
Maximum core temperature	71.4°C	63.4°C
Maximum frequency	2.67 GHz	3.4 GHz
Number of cores	4	2
Transistor count	456 million	376 million
VID voltage range	0.8500V-1.3625V	1.200V-1.3375V
Memory
Supported memory types	DDR1, DDR2, DDR3	DDR1, DDR2, DDR3
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1	2
Package Size	37.5mm x 37.5mm	37.5mm x 37.5mm
Sockets supported	LGA775	PLGA775
Thermal Design Power (TDP)	95 Watt	95 Watt
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
Thermal Monitoring
Physical Address Extensions (PAE)		32-bit
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)