i5-9400F vs Pentium G840

Primary details

Comparing Pentium G840 and Core i5-9400F processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2604	1108
Place by popularity	not in top-100	24
Cost-effectiveness evaluation	4.61	9.41
Market segment	Desktop processor	Desktop processor
Series	no data	Intel Core i5
Power efficiency	1.18	8.67
Architecture codename	Sandy Bridge (2011−2013)	Coffee Lake-R (2018−2019)
Release date	22 May 2011 (13 years ago)	8 January 2019 (5 years ago)
Launch price (MSRP)	$60	$182

Cost-effectiveness evaluation

Performance per price, higher is better.

i5-9400F has 104% better value for money than Pentium G840.

Detailed specifications

Pentium G840 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	2.8 GHz	2.9 GHz
Boost clock speed	2.8 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	64 KB (per core)	64K (per core)
L2 cache	256 KB (per core)	256K (per core)
L3 cache	3 MB (shared)	9 MB (shared)
Chip lithography	32 nm	14 nm
Die size	131 mm2	149 mm2
Maximum core temperature	69 °C	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	504 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+

Compatibility

Information on Pentium G840 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	1	1 (Uniprocessor)
Socket	FCLGA1155	FCLGA1151
Power consumption (TDP)	65 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium G840 and Core i5-9400F. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	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	+	+
Flex Memory Access	+	no data
FDI	+	no data
Fast Memory Access	+	no data

Security technologies

Pentium G840 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 G840 and Core i5-9400F are enumerated here.

VT-d	-	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium G840 and Core i5-9400F. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4-2666
Maximum memory size	32 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	21 GB/s	42.671 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics for 2nd Generation Intel Processors	no data
Graphics max frequency	1.1 GHz	no data

Graphics interfaces

Available interfaces and connections of Pentium G840 and Core i5-9400F integrated GPUs.

Number of displays supported

2

no data

Peripherals

Specifications and connection of peripherals supported by Pentium G840 and Core i5-9400F.

PCIe version	2.0	3.0
PCI Express lanes	no data	16

Synthetic benchmark performance

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

---

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.

---

Pros & cons summary

---

Performance score	0.81	5.96
Recency	22 May 2011	8 January 2019
Physical cores	2	6
Threads	2	6
Chip lithography	32 nm	14 nm

---

Should you still have questions on choice between Pentium G840 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.

---