FX-8120 vs Ryzen 9 5900

Primary details

Comparing Ryzen 9 5900 and FX-8120 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	212	1303
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	60.51	2.74
Market segment	Desktop processor	Desktop processor
Series	AMD Ryzen 9	no data
Architecture codename	Vermeer (2020−2022)	Zambezi (2011−2012)
Release date	12 January 2021 (3 years ago)	12 October 2011 (12 years ago)
Current price	$303	$68

Cost-effectiveness evaluation

Performance per price, higher is better.

Ryzen 9 5900 has 2108% better value for money than FX-8120.

Detailed specifications

Ryzen 9 5900 and FX-8120 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	12 (Dodeca-Core)	8 (Octa-Core)
Threads	24	8
Base clock speed	3 GHz	3.1 GHz
Boost clock speed	4.7 GHz	4 GHz
L1 cache	64K (per core)	384 KB
L2 cache	512K (per core)	8192 KB
L3 cache	64 MB	8192 KB
Chip lithography	7 nm, 12 nm	32 nm
Die size	81 mm2	315 mm2
Maximum core temperature	no data	61 °C
Maximum case temperature (TCase)	95 °C	no data
Number of transistors	4,150 million	1,200 million
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	Yes	Yes
P0 Vcore voltage	no data	Min: 1.0125 V - Max: 1.4125 V

Compatibility

Information on Ryzen 9 5900 and FX-8120 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
Socket	AM4	AM3+
Power consumption (TDP)	65 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 5900 and FX-8120. 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 Ryzen 9 5900 and FX-8120 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 5900 and FX-8120. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR3
Maximum memory size	128 GB	no data
Maximum memory bandwidth	51.196 GB/s	no data

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 5900 and FX-8120.

PCIe version

4.0

n/a

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.

Ryzen 9 5900 outperforms FX-8120 by 423% based on our aggregate benchmark results.

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Pros & cons summary

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Performance score	22.26	4.26
Recency	12 January 2021	12 October 2011
Physical cores	12	8
Threads	24	8
Chip lithography	7 nm	32 nm
Power consumption (TDP)	65 Watt	125 Watt

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Should you still have questions on choice between Ryzen 9 5900 and FX-8120, ask them in Comments section, and we shall answer.

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