Ryzen 9 3900X vs Pentium D 940

Primary details

Comparing Pentium D 940 and Ryzen 9 3900X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	269
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	20.59
Market segment	Desktop processor	Desktop processor
Series	no data	AMD Ryzen 9
Power efficiency	no data	18.51
Architecture codename	Presler (2005−2007)	Matisse (Zen 2) (2019−2020)
Release date	5 January 2006 (18 years ago)	7 July 2019 (5 years ago)
Launch price (MSRP)	$423	$499

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Pentium D 940 and Ryzen 9 3900X 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)	12 (Dodeca-Core)
Threads	2	24
Base clock speed	3.2 GHz	3.8 GHz
Boost clock speed	3.2 GHz	4.6 GHz
L1 cache	16 KB (per core)	768 KB
L2 cache	2 MB (per die)	6 MB
L3 cache	0 KB	64 MB
Chip lithography	65 nm	7 nm, 12 nm
Die size	2x 81 mm2	no data
Maximum core temperature	no data	95 °C
Maximum case temperature (TCase)	69 °C	no data
Number of transistors	376 million	19,200 million
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+
VID voltage range	1.2V-1.3375V	no data

Compatibility

Information on Pentium D 940 and Ryzen 9 3900X 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	1	1 (Uniprocessor)
Socket	LGA775,PLGA775	AM4
Power consumption (TDP)	130 Watt	105 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium D 940 and Ryzen 9 3900X. 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 940 and Ryzen 9 3900X 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 940 and Ryzen 9 3900X 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 940 and Ryzen 9 3900X. 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

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

-

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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Pros & cons summary

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Recency	5 January 2006	7 July 2019
Physical cores	2	12
Threads	2	24
Chip lithography	65 nm	7 nm
Power consumption (TDP)	130 Watt	105 Watt

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Should you still have questions on choice between Pentium D 940 and Ryzen 9 3900X, ask them in Comments section, and we shall answer.

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