Intel Pentium D 945 vs Intel Pentium III 800

Comparative analysis of Intel Pentium D 945 and Intel Pentium III 800 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: Geekbench 4 - Single Core, Geekbench 4 - Multi-Core, PassMark - Single thread mark, PassMark - CPU mark.

Intel Pentium D 945

Intel Pentium III 800

Differences

Reasons to consider the Intel Pentium D 945

1 more cores, run more applications at once: 2 vs 1
Around 325% higher clock speed: 3.4 GHz vs 0.8 GHz
A newer manufacturing process allows for a more powerful, yet cooler running processor: 65 nm vs 180 nm
3.5x more L1 cache, more data can be stored in the L1 cache for quick access later
16x more L2 cache, more data can be stored in the L2 cache for quick access later

Number of cores	2 vs 1
Maximum frequency	3.4 GHz vs 0.8 GHz
Manufacturing process technology	65 nm vs 180 nm
L1 cache	28 KB vs 8 KB
L2 cache	4096 KB vs 256 KB
Max number of CPUs in a configuration	2 vs 1

Reasons to consider the Intel Pentium III 800

Around 26% higher maximum core temperature: 80°C vs 63.4°C
4.5x lower typical power consumption: 20.8 Watt vs 95 Watt

Maximum core temperature	80°C vs 63.4°C
Thermal Design Power (TDP)	20.8 Watt vs 95 Watt

Compare benchmarks

CPU 1: Intel Pentium D 945
CPU 2: Intel Pentium III 800

Name	Intel Pentium D 945	Intel Pentium III 800
Geekbench 4 - Single Core	220
Geekbench 4 - Multi-Core	389
PassMark - Single thread mark		237
PassMark - CPU mark		182

Compare specifications (specs)

	Intel Pentium D 945	Intel Pentium III 800
Essentials
Architecture codename	Presler	Coppermine T
Launch date	July 2006	n/d
Place in performance rating	3270	3273
Processor Number	945
Series	Legacy Intel® Pentium® Processor	Legacy Intel® Pentium® Processor
Status	Discontinued	Discontinued
Vertical segment	Desktop	Desktop
Performance
64 bit support
Base frequency	3.40 GHz	800 MHz
Bus Speed	800 MHz FSB	133 MHz FSB
Die size	162 mm2	80 mm
L1 cache	28 KB	8 KB
L2 cache	4096 KB	256 KB
Manufacturing process technology	65 nm	180 nm
Maximum core temperature	63.4°C	80°C
Maximum frequency	3.4 GHz	0.8 GHz
Number of cores	2	1
Transistor count	376 million	44 million
VID voltage range	1.200V-1.3375V	1.75V
Maximum case temperature (TCase)		69 °C
Memory
Supported memory types	DDR1, DDR2, DDR3
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	2	1
Package Size	37.5mm x 37.5mm
Sockets supported	PLGA775	PPGA370, SECC2, SECC2495
Thermal Design Power (TDP)	95 Watt	20.8 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
Physical Address Extensions (PAE)	32-bit
Thermal Monitoring
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)