EPYC 9845 vs EPYC 7551

Primary details

Comparing EPYC 7551 and EPYC 9845 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	401	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.30	no data
Market segment	Server	Server
Series	AMD EPYC	no data
Power efficiency	8.59	no data
Architecture codename	Naples (2017−2018)	Turin (2024)
Release date	20 June 2017 (7 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$3,400	$13,564

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

EPYC 7551 and EPYC 9845 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)	160
Threads	64	320
Base clock speed	2 GHz	2.1 GHz
Boost clock speed	2 GHz	3.7 GHz
Multiplier	20	no data
L1 cache	3 MB	80 KB (per core)
L2 cache	16 MB	1 MB (per core)
L3 cache	64 MB (shared)	320 MB (shared)
Chip lithography	14 nm	3 nm
Die size	213 mm2	no data
Number of transistors	19200 Million	no data
64 bit support	+	+
Windows 11 compatibility	-	no data
Unlocked multiplier	+	-

Compatibility

Information on EPYC 7551 and EPYC 9845 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)	2
Socket	TR4	SP5
Power consumption (TDP)	180 Watt	390 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7551 and EPYC 9845. 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 7551 and EPYC 9845 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7551 and EPYC 9845. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Eight-channel	DDR5
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	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Peripherals

Specifications and connection of peripherals supported by EPYC 7551 and EPYC 9845.

PCIe version	3.0	5.0
PCI Express lanes	128	128

Pros & cons summary

---

Recency	20 June 2017	10 October 2024
Physical cores	32	160
Threads	64	320
Chip lithography	14 nm	3 nm
Power consumption (TDP)	180 Watt	390 Watt

---

Should you still have questions on choice between EPYC 7551 and EPYC 9845, 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.

---