Intel Atom D525 vs Intel Pentium III 866

Comparative analysis of Intel Atom D525 and Intel Pentium III 866 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Graphics, 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.

Intel Atom D525

Intel Pentium III 866

Differences

Reasons to consider the Intel Atom D525

1 more cores, run more applications at once: 2 vs 1
Around 107% higher clock speed: 1.8 GHz vs 0.87 GHz
Around 25% higher maximum core temperature: 100°C vs 80°C
A newer manufacturing process allows for a more powerful, yet cooler running processor: 45 nm vs 180 nm
14x 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
2x lower typical power consumption: 13 Watt vs 26.1 Watt
Around 49% better performance in PassMark - Single thread mark: 301 vs 202
2.6x better performance in PassMark - CPU mark: 398 vs 152

Specifications (specs)
Number of cores	2 vs 1
Maximum frequency	1.8 GHz vs 0.87 GHz
Maximum core temperature	100°C vs 80°C
Manufacturing process technology	45 nm vs 180 nm
L1 cache	112 KB vs 8 KB
L2 cache	1024 KB vs 256 KB
Thermal Design Power (TDP)	13 Watt vs 26.1 Watt
Benchmarks
PassMark - Single thread mark	301 vs 202
PassMark - CPU mark	398 vs 152

Compare benchmarks

CPU 1: Intel Atom D525
CPU 2: Intel Pentium III 866

PassMark - Single thread mark

CPU 1

CPU 2

301

202

PassMark - CPU mark

CPU 1

CPU 2

398

152

Name	Intel Atom D525	Intel Pentium III 866
PassMark - Single thread mark	301	202
PassMark - CPU mark	398	152
Geekbench 4 - Single Core	90
Geekbench 4 - Multi-Core	247

Compare specifications (specs)

	Intel Atom D525	Intel Pentium III 866
Essentials
Architecture codename	Pineview	Coppermine T
Launch date	21 June 2010	Q1'00
Launch price (MSRP)	$63
Place in performance rating	3296	3303
Processor Number	D525
Series	Legacy Intel Atom® Processors	Legacy Intel® Pentium® Processor
Status	Discontinued	Discontinued
Vertical segment	Desktop	Desktop
Performance
64 bit support
Base frequency	1.80 GHz	866 MHz
Bus Speed	2.5 GT/s DMI	133 MHz FSB
Die size	87 mm2	80 mm
L1 cache	112 KB	8 KB
L2 cache	1024 KB	256 KB
Manufacturing process technology	45 nm	180 nm
Maximum core temperature	100°C	80°C
Maximum frequency	1.8 GHz	0.87 GHz
Number of cores	2	1
Number of threads	4
Transistor count	176 million	44 million
VID voltage range	0.800V-1.175V	1.75V
Maximum case temperature (TCase)		69 °C
Memory
Max memory channels	1
Maximum memory bandwidth	6.4 GB/s
Maximum memory size	4 GB
Supported memory types	DDR3 800 (SODIMM only); DDR2 667/800
Graphics
Processor graphics	Integrated
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1	1
Package Size	22mm x 22mm
Sockets supported	FCBGA559	PPGA370, SECC2, SECC2495
Thermal Design Power (TDP)	13 Watt	26.1 Watt
Security & Reliability
Execute Disable Bit (EDB)
Intel® Trusted Execution technology (TXT)
Advanced Technologies
Enhanced Intel SpeedStep® technology
Idle States
Instruction set extensions	Intel® SSE2, Intel® SSE3, Intel® SSSE3
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)