Phenom II X4 850 vs EPYC 7551

Primary details

Comparing EPYC 7551 and Phenom II X4 850 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	450	2021
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	19.19	2.32
Market segment	Server	Desktop processor
Series	AMD EPYC	no data
Architecture codename	Naples (2017−2018)	Propus (2009−2011)
Release date	29 June 2017 (6 years ago)	1 June 2011 (12 years ago)
Launch price (MSRP)	$3,400	$111
Current price	$252 (0.1x MSRP)	$69 (0.6x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

EPYC 7551 has 727% better value for money than Phenom II X4 850.

Detailed specifications

EPYC 7551 and Phenom II X4 850 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	32 (Dotriaconta-Core)	4 (Quad-Core)
Threads	64	4
Base clock speed	2 GHz	3.3 GHz
Boost clock speed	3 GHz	3.3 GHz
L1 cache	96K (per core)	128 KB (per core)
L2 cache	512K (per core)	512 KB (per core)
L3 cache	64 MB (shared)	0 KB
Chip lithography	14 nm	45 nm
Die size	192 mm2	169 mm2
Number of transistors	4,800 million	300 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	Yes	No

Compatibility

Information on EPYC 7551 and Phenom II X4 850 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	2 (Multiprocessor)	1
Socket	TR4	AM3
Power consumption (TDP)	180 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7551 and Phenom II X4 850. You'll probably need this information if you require some particular technology.

AES-NI	+	no data
AVX	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7551 and Phenom II X4 850 are enumerated here.

AMD-V

+

no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7551 and Phenom II X4 850. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Eight-channel	DDR3
Maximum memory size	2 TiB	no data
Max memory channels	8	no data
Maximum memory bandwidth	170.671 GB/s	no data
ECC memory support	+	no data

Peripherals

Specifications and connection of peripherals supported by EPYC 7551 and Phenom II X4 850.

PCIe version	3.0	2.0
PCI Express lanes	128	no data

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 7551 outperforms Phenom II X4 850 by 849% based on our aggregated benchmark results.

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Pros & cons summary

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Performance score	14.52	1.53
Recency	29 June 2017	1 June 2011
Physical cores	32	4
Threads	64	4
Cost	$3400	$111
Chip lithography	14 nm	45 nm
Power consumption (TDP)	180 Watt	95 Watt

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Should you still have questions on choice between EPYC 7551 and Phenom II X4 850, ask them in Comments section, and we shall answer.

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