Ryzen 7 3800X vs Pentium D 820

Primary details

Comparing Pentium D 820 and Ryzen 7 3800X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	3084	487
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	15.87
Market segment	Desktop processor	Desktop processor
Series	Pentium D	AMD Ryzen 7
Power efficiency	0.31	13.13
Architecture codename	Smithfield (2005)	Matisse (2019−2020)
Release date	May 2005 (19 years ago)	7 July 2019 (5 years ago)
Launch price (MSRP)	no data	$399

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Pentium D 820 and Ryzen 7 3800X basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	2 (Dual-core)	8 (Octa-Core)
Threads	2	16
Base clock speed	2.8 GHz	3.9 GHz
Boost clock speed	2.8 GHz	4.5 GHz
Bus rate	800 MHz	no data
L1 cache	28 KB	96K (per core)
L2 cache	2 MB	512K (per core)
L3 cache	0 KB	32 MB
Chip lithography	90 nm	7 nm, 12 nm
Die size	206 mm2	no data
Maximum core temperature	64 °C	no data
Number of transistors	169 million	19,200 million
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+
VID voltage range	1.2V-1.4V	no data

Compatibility

Information on Pentium D 820 and Ryzen 7 3800X compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	2	1 (Uniprocessor)
Socket	PLGA775	AM4
Power consumption (TDP)	95 Watt	105 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium D 820 and Ryzen 7 3800X. You'll probably need this information if you require some particular technology.

AES-NI	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	-	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
Idle States	+	no data
Demand Based Switching	-	no data
PAE	32 Bit	no data
FSB parity	-	no data
Precision Boost 2	no data	+

Security technologies

Pentium D 820 and Ryzen 7 3800X technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium D 820 and Ryzen 7 3800X are enumerated here.

AMD-V	-	+
VT-d	-	no data
VT-x	-	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium D 820 and Ryzen 7 3800X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, DDR3	DDR4 Dual-channel
Maximum memory size	no data	128 GB
Max memory channels	no data	2
Maximum memory bandwidth	no data	51.196 GB/s

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	0.31	14.57
Physical cores	2	8
Threads	2	16
Chip lithography	90 nm	7 nm
Power consumption (TDP)	95 Watt	105 Watt

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Should you still have questions on choice between Pentium D 820 and Ryzen 7 3800X, ask them in Comments section, and we shall answer.

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