EPYC 9645 vs Xeon Platinum 8276

Primary details

Comparing Xeon Platinum 8276 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
Series	Intel Xeon Platinum	no data
Architecture codename	Cascade Lake-SP (2018)	Turin (2024)
Release date	11 December 2018 (6 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$8,719	$11,048

Detailed specifications

Xeon Platinum 8276 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	28 (Octacosa-Core)	96
Threads	56	192
Base clock speed	2.2 GHz	2.3 GHz
Boost clock speed	4 GHz	3.7 GHz
Multiplier	22	no data
L1 cache	64 KB (per core)	80 KB (per core)
L2 cache	1 MB (per core)	1 MB (per core)
L3 cache	38.5 MB (shared)	256 MB (shared)
Chip lithography	14 nm	3 nm
Maximum core temperature	89 °C	no data
Number of transistors	8,000 million	no data
64 bit support	+	+
Windows 11 compatibility	+	no data

Compatibility

Information on Xeon Platinum 8276 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	8 (Multiprocessor)	2
Socket	FCLGA3647	SP5
Power consumption (TDP)	165 Watt	320 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon Platinum 8276 and EPYC 9645. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512	no data
AES-NI	+	+
AVX	+	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	no data
Speed Shift	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
TSX	+	-
Turbo Boost Max 3.0	-	no data
Precision Boost 2	no data	+
Deep Learning Boost	+	-

Security technologies

Xeon Platinum 8276 and EPYC 9645 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon Platinum 8276 and EPYC 9645 are enumerated here.

AMD-V	-	+
VT-d	+	no data
VT-x	+	no data
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon Platinum 8276 and EPYC 9645. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2933	DDR5
Maximum memory size	1 TB	no data
Max memory channels	6	no data
Maximum memory bandwidth	140.8 GB/s	no data
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

N/A

Peripherals

Specifications and connection of peripherals supported by Xeon Platinum 8276 and EPYC 9645.

PCIe version	3.0	5.0
PCI Express lanes	48	128

Pros & cons summary

---

Recency	11 December 2018	10 October 2024
Physical cores	28	96
Threads	56	192
Chip lithography	14 nm	3 nm
Power consumption (TDP)	165 Watt	320 Watt

---

Should you still have questions on choice between Xeon Platinum 8276 and EPYC 9645, 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.

---