EPYC 7451 vs Core 2 Quad Q9550

Primary details

Comparing Core 2 Quad Q9550 and EPYC 7451 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	2051	358
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.80	2.08
Market segment	Desktop processor	Server
Series	Core 2 Quad (Desktop)	AMD EPYC
Architecture codename	Yorkfield (2007−2009)	Naples (2017−2018)
Release date	no data	20 June 2017 (7 years ago)
Launch price (MSRP)	no data	$2,400
Current price	$54	$2768 (1.2x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

Core 2 Quad Q9550 has 35% better value for money than EPYC 7451.

Detailed specifications

Core 2 Quad Q9550 and EPYC 7451 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)	24 (Tetracosa-Core)
Threads	4	48
Base clock speed	no data	2.3 GHz
Boost clock speed	2.83 GHz	2.3 GHz
Bus support	1333 MHz	no data
L1 cache	no data	2.25 MB
L2 cache	12288 KB	12 MB
L3 cache	no data	64 MB (shared)
Chip lithography	45 nm	14 nm
Die size	no data	213 mm2
Number of transistors	no data	19200 Million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	Yes

Compatibility

Information on Core 2 Quad Q9550 and EPYC 7451 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	no data	2 (Multiprocessor)
Socket	LGA775	TR4
Power consumption (TDP)	95 Watt	180 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q9550 and EPYC 7451. 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 Core 2 Quad Q9550 and EPYC 7451 are enumerated here.

AMD-V

no data

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q9550 and EPYC 7451. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1,DDR2,DDR3	DDR4 Eight-channel
Maximum memory size	no data	2 TiB
Max memory channels	no data	8
Maximum memory bandwidth	no data	170.671 GB/s
ECC memory support	no data	+

Peripherals

Specifications and connection of peripherals supported by Core 2 Quad Q9550 and EPYC 7451.

PCIe version	no data	3.0
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 7451 outperforms Core 2 Quad Q9550 by 1007% based on our aggregate benchmark results.

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Pros & cons summary

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Performance score	1.51	16.72
Physical cores	4	24
Threads	4	48
Chip lithography	45 nm	14 nm
Power consumption (TDP)	95 Watt	180 Watt

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Should you still have questions on choice between Core 2 Quad Q9550 and EPYC 7451, ask them in Comments section, and we shall answer.

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