EPYC 9645 vs EPYC 9655

Primary details

Comparing EPYC 9655 and EPYC 9645 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Server	Server
Architecture codename	Turin (2024)	Turin (2024)
Release date	10 October 2024 (less than a year ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$11,852	$11,048

Detailed specifications

EPYC 9655 and EPYC 9645 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	96	96
Threads	192	192
Base clock speed	2.6 GHz	2.3 GHz
Boost clock speed	4.5 GHz	3.7 GHz
L1 cache	80 KB (per core)	80 KB (per core)
L2 cache	1 MB (per core)	1 MB (per core)
L3 cache	384 MB (shared)	256 MB (shared)
Chip lithography	4 nm	3 nm
Die size	12x 70.6 mm2	no data
Number of transistors	99,780 million	no data
64 bit support	+	+

Compatibility

Information on EPYC 9655 and EPYC 9645 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	2
Socket	SP5	SP5
Power consumption (TDP)	400 Watt	320 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 9655 and EPYC 9645. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	+	+
Precision Boost 2	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 9655 and EPYC 9645 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 9655 and EPYC 9645. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR5

DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

N/A

Peripherals

Specifications and connection of peripherals supported by EPYC 9655 and EPYC 9645.

PCIe version	5.0	5.0
PCI Express lanes	128	128

Pros & cons summary

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Chip lithography	4 nm	3 nm
Power consumption (TDP)	400 Watt	320 Watt

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Should you still have questions on choice between EPYC 9655 and EPYC 9645, ask them in Comments section, and we shall answer.

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