EPYC 7643 vs i7-3840QM

Primary details

Comparing Core i7-3840QM and EPYC 7643 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1477	39
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	6.36
Market segment	Laptop	Server
Series	Intel Core i7	AMD EPYC
Power efficiency	7.81	20.13
Architecture codename	Ivy Bridge (2012−2013)	Milan (2021−2023)
Release date	3 September 2012 (12 years ago)	12 January 2021 (3 years ago)
Launch price (MSRP)	$568	$4,995

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-3840QM and EPYC 7643 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	4 (Quad-Core)	48 (Octatetraconta-Core)
Threads	8	96
Base clock speed	2.8 GHz	2.3 GHz
Boost clock speed	3.8 GHz	3.6 GHz
Bus rate	5 GT/s	no data
Multiplier	no data	23
L1 cache	64K (per core)	3 MB
L2 cache	256K (per core)	24 MB
L3 cache	8 MB (shared)	256 MB (shared)
Chip lithography	22 nm	7 nm+
Die size	160 mm2	8x 81 mm2
Maximum core temperature	105 °C	no data
Number of transistors	1,400 million	33,200 million
64 bit support	+	+
Windows 11 compatibility	-	+

Compatibility

Information on Core i7-3840QM and EPYC 7643 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	2
Socket	FCBGA1224,FCPGA988	SP3
Power consumption (TDP)	45 Watt	225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-3840QM and EPYC 7643. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX	no data
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	no data
My WiFi	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Thermal Monitoring	+	-
Flex Memory Access	+	no data
Demand Based Switching	-	no data
FDI	+	no data
Fast Memory Access	+	no data

Security technologies

Core i7-3840QM and EPYC 7643 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data
Secure Key	+	no data
Identity Protection	+	-
Anti-Theft	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-3840QM and EPYC 7643 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-3840QM and EPYC 7643. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4-3200
Maximum memory size	32 GB	4 TiB
Max memory channels	2	no data
Maximum memory bandwidth	25.6 GB/s	204.795 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics 4000	N/A
Quick Sync Video	+	-
Clear Video HD	+	no data
Graphics max frequency	1.3 GHz	no data
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Core i7-3840QM and EPYC 7643 integrated GPUs.

Number of displays supported	3	no data
eDP	+	no data
DisplayPort	+	-
HDMI	+	-
SDVO	+	no data
CRT	+	no data

Peripherals

Specifications and connection of peripherals supported by Core i7-3840QM and EPYC 7643.

PCIe version	3.0	4.0
PCI Express lanes	16	128

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	3.73	48.05
Recency	3 September 2012	12 January 2021
Physical cores	4	48
Threads	8	96
Chip lithography	22 nm	7 nm
Power consumption (TDP)	45 Watt	225 Watt

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Should you still have questions on choice between Core i7-3840QM and EPYC 7643, ask them in Comments section, and we shall answer.

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