Intel Pentium D 820 vs Intel Pentium D 840

Comparative analysis of Intel Pentium D 820 and Intel Pentium D 840 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.

Intel Pentium D 820

Intel Pentium D 840

Differences

Reasons to consider the Intel Pentium D 820

Around 37% lower typical power consumption: 95 Watt vs 130 Watt

Thermal Design Power (TDP)	95 Watt vs 130 Watt

Reasons to consider the Intel Pentium D 840

Around 14% higher clock speed: 3.2 GHz vs 2.8 GHz
Around 9% higher maximum core temperature: 69.8°C vs 64.1°C
Around 4% better performance in Geekbench 4 - Single Core: 186 vs 179
Around 1% better performance in Geekbench 4 - Multi-Core: 309 vs 307

Specifications (specs)
Maximum frequency	3.2 GHz vs 2.8 GHz
Maximum core temperature	69.8°C vs 64.1°C
Benchmarks
Geekbench 4 - Single Core	186 vs 179
Geekbench 4 - Multi-Core	309 vs 307

Compare benchmarks

CPU 1: Intel Pentium D 820
CPU 2: Intel Pentium D 840

Geekbench 4 - Single Core

CPU 1

CPU 2

179

186

Geekbench 4 - Multi-Core

CPU 1

CPU 2

307

309

Name	Intel Pentium D 820	Intel Pentium D 840
Geekbench 4 - Single Core	179	186
Geekbench 4 - Multi-Core	307	309

Compare specifications (specs)

	Intel Pentium D 820	Intel Pentium D 840
Essentials
Architecture codename	Smithfield	Smithfield
Launch date	May 2005	May 2005
Place in performance rating	3292	3288
Processor Number	820	840
Series	Legacy Intel® Pentium® Processor	Legacy Intel® Pentium® Processor
Status	Discontinued	Discontinued
Vertical segment	Desktop	Desktop
Performance
64 bit support
Base frequency	2.80 GHz	3.20 GHz
Bus Speed	800 MHz FSB	800 MHz FSB
Die size	206 mm2	206 mm2
Front-side bus (FSB)	800 MHz
L1 cache	28 KB	28 KB
L2 cache	2048 KB	2048 KB
Manufacturing process technology	90 nm	90 nm
Maximum core temperature	64.1°C	69.8°C
Maximum frequency	2.8 GHz	3.2 GHz
Number of cores	2	2
Number of threads	2
Transistor count	230 million	230 million
VID voltage range	1.200V-1.400V	1.200V-1.400V
Memory
Supported memory types	DDR1, DDR2, DDR3	DDR1, DDR2, DDR3
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	2	2
Package Size	37.5mm x 37.5mm	37.5mm x 37.5mm
Sockets supported	PLGA775	PLGA775
Thermal Design Power (TDP)	95 Watt	130 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	32-bit
Thermal Monitoring
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)