i5-9400F vs Pentium D 840

Primary details

Comparing Pentium D 840 and Core i5-9400F processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	1094
Place by popularity	not in top-100	25
Cost-effectiveness evaluation	no data	9.10
Market segment	Desktop processor	Desktop processor
Series	no data	Intel Core i5
Power efficiency	no data	8.68
Architecture codename	Smithfield (2005)	Coffee Lake-R (2018−2019)
Release date	May 2005 (19 years ago)	7 January 2019 (5 years ago)
Launch price (MSRP)	no data	$182

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Pentium D 840 and Core i5-9400F 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)	6 (Hexa-Core)
Threads	2	6
Base clock speed	3.2 GHz	2.9 GHz
Boost clock speed	3.2 GHz	4.1 GHz
Bus type	no data	DMI 3.0
Bus rate	no data	4 × 8 GT/s
Multiplier	no data	29
L1 cache	28 KB	385 KB
L2 cache	2 MB	1.5 MB
L3 cache	0 KB	9 MB (shared)
Chip lithography	90 nm	14 nm
Die size	206 mm2	149 mm2
Maximum core temperature	70 °C	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	169 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
VID voltage range	1.2V-1.4V	no data

Compatibility

Information on Pentium D 840 and Core i5-9400F 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	FCLGA1151
Power consumption (TDP)	130 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium D 840 and Core i5-9400F. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	2.0
Hyper-Threading Technology	-	-
Idle States	+	+
Thermal Monitoring	-	+
Demand Based Switching	-	no data
PAE	32 Bit	no data
FSB parity	-	no data

Security technologies

Pentium D 840 and Core i5-9400F technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	-
EDB	+	+
Secure Key	no data	+
MPX	-	+
Identity Protection	-	+
SGX	no data	Yes with Intel® ME
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium D 840 and Core i5-9400F are enumerated here.

VT-d	-	+
VT-x	-	+
EPT	no data	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium D 840 and Core i5-9400F. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, DDR3	DDR4-2666
Maximum memory size	no data	128 GB
Max memory channels	no data	2
Maximum memory bandwidth	no data	42.671 GB/s

Peripherals

Specifications and connection of peripherals supported by Pentium D 840 and Core i5-9400F.

PCIe version	no data	3.0
PCI Express lanes	no data	16

Pros & cons summary

---

Physical cores	2	6
Threads	2	6
Chip lithography	90 nm	14 nm
Power consumption (TDP)	130 Watt	65 Watt

---

Should you still have questions on choice between Pentium D 840 and Core i5-9400F, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

---