EPYC 7643 vs FX-4100

Primary details

Comparing FX-4100 and EPYC 7643 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1960	31
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.24	3.29
Market segment	Desktop processor	Server
Series	no data	AMD EPYC
Architecture codename	Zambezi (2011−2012)	Milan (2021)
Release date	12 October 2011 (12 years ago)	15 March 2021 (3 years ago)
Launch price (MSRP)	no data	$4,995
Current price	$28	$8164 (1.6x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

EPYC 7643 has 1271% better value for money than FX-4100.

Detailed specifications

FX-4100 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	4	96
Base clock speed	3.6 GHz	2.3 GHz
Boost clock speed	3.8 GHz	3.6 GHz
L1 cache	192 KB	64 KB (per core)
L2 cache	4096 KB	512 KB (per core)
L3 cache	8192 KB	256 MB (shared)
Chip lithography	32 nm	7 nm+
Die size	315 mm2	8x 81 mm2
Maximum core temperature	71 °C	no data
Number of transistors	1,200 million	33,200 million
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	Yes	Yes
P0 Vcore voltage	Min: 1.1 V - Max: 1.4125 V	no data

Compatibility

Information on FX-4100 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	AM3+	SP3
Power consumption (TDP)	95 Watt	225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by FX-4100 and EPYC 7643. You'll probably need this information if you require some particular technology.

AES-NI	+	+
FMA	+	no data
AVX	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by FX-4100 and EPYC 7643 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by FX-4100 and EPYC 7643. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4-3200
Maximum memory size	no data	4 TiB
Maximum memory bandwidth	no data	204.795 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Peripherals

Specifications and connection of peripherals supported by FX-4100 and EPYC 7643.

PCIe version	n/a	4.0
PCI Express lanes	no data	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.

EPYC 7643 outperforms FX-4100 by 2819% based on our aggregated benchmark results.

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Pros & cons summary

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Performance score	1.67	48.74
Recency	12 October 2011	15 March 2021
Physical cores	4	48
Threads	4	96
Chip lithography	32 nm	7 nm
Power consumption (TDP)	95 Watt	225 Watt

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Should you still have questions on choice between FX-4100 and EPYC 7643, ask them in Comments section, and we shall answer.

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