EPYC 9755 vs EPYC 7643

Primary details

Comparing EPYC 7643 and EPYC 9755 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	39	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	6.37	no data
Market segment	Server	Server
Series	AMD EPYC	no data
Power efficiency	20.14	no data
Architecture codename	Milan (2021−2023)	Turin (2024)
Release date	15 March 2021 (3 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$4,995	$12,984

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

EPYC 7643 and EPYC 9755 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	48 (Octatetraconta-Core)	128
Threads	96	256
Base clock speed	2.3 GHz	2.7 GHz
Boost clock speed	3.6 GHz	4.1 GHz
Multiplier	23	no data
L1 cache	64 KB (per core)	80 KB (per core)
L2 cache	512 KB (per core)	1 MB (per core)
L3 cache	256 MB (shared)	512 MB (shared)
Chip lithography	7 nm+	4 nm
Die size	8x 81 mm2	16x 70.6 mm2
Number of transistors	33,200 million	133,040 million
64 bit support	+	+
Windows 11 compatibility	+	no data

Compatibility

Information on EPYC 7643 and EPYC 9755 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	SP3	SP5
Power consumption (TDP)	225 Watt	500 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7643 and EPYC 9755. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	+	+
Precision Boost 2	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7643 and EPYC 9755 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7643 and EPYC 9755. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR5
Maximum memory size	4 TiB	no data
Maximum memory bandwidth	204.795 GB/s	no data

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 7643 and EPYC 9755.

PCIe version	4.0	5.0
PCI Express lanes	128	128

Pros & cons summary

---

Recency	15 March 2021	10 October 2024
Physical cores	48	128
Threads	96	256
Chip lithography	7 nm	4 nm
Power consumption (TDP)	225 Watt	500 Watt

---

Should you still have questions on choice between EPYC 7643 and EPYC 9755, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

---