i9-10940XE vs i5-9400F

Primary details

Comparing Core i5-9400F and Core i9-10940XE processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1108	not rated
Place by popularity	24	not in top-100
Cost-effectiveness evaluation	9.41	no data
Market segment	Desktop processor	Desktop processor
Series	Intel Core i5	no data
Power efficiency	8.68	no data
Architecture codename	Coffee Lake-R (2018−2019)	Cascade Lake-X (2019)
Release date	7 January 2019 (5 years ago)	19 October 2019 (5 years ago)
Launch price (MSRP)	$182	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i5-9400F and Core i9-10940XE 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	6 (Hexa-Core)	14 (Tetradeca-Core)
Threads	6	28
Base clock speed	2.9 GHz	3.3 GHz
Boost clock speed	4.1 GHz	4.8 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
Multiplier	29	no data
L1 cache	385 KB	64K (per core)
L2 cache	1.5 MB	1 MB (per core)
L3 cache	9 MB (shared)	19.25 MB (shared)
Chip lithography	14 nm	14 nm
Die size	149 mm2	no data
Maximum core temperature	100 °C	no data
Maximum case temperature (TCase)	72 °C	no data
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	-	+

Compatibility

Information on Core i5-9400F and Core i9-10940XE 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 (Uniprocessor)	1
Socket	FCLGA1151	2066
Power consumption (TDP)	65 Watt	165 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-9400F and Core i9-10940XE. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	no data
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	-	no data
TSX	-	+
Idle States	+	no data
Thermal Monitoring	+	-

Security technologies

Core i5-9400F and Core i9-10940XE technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-9400F and Core i9-10940XE are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-9400F and Core i9-10940XE. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR4 Quad-channel
Maximum memory size	128 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	42.671 GB/s	no data

Peripherals

Specifications and connection of peripherals supported by Core i5-9400F and Core i9-10940XE.

PCIe version	3.0	3.0
PCI Express lanes	16	no data

Pros & cons summary

---

Recency	7 January 2019	19 October 2019
Physical cores	6	14
Threads	6	28
Power consumption (TDP)	65 Watt	165 Watt

---

Should you still have questions on choice between Core i5-9400F and Core i9-10940XE, 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.

---