Xeon 6556P-B vs Platinum 8558

Primary details

Comparing Xeon Platinum 8558 and Xeon 6556P-B 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
Designer	Intel	Intel
Architecture codename	Emerald Rapids (2023)	Granite Rapids (2024−2025)
Release date	14 December 2023 (1 year ago)	24 February 2025 (recently)
Launch price (MSRP)	$4,650	$2,628

Detailed specifications

Xeon Platinum 8558 and Xeon 6556P-B 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)	36
Threads	96	72
Base clock speed	2.1 GHz	2.3 GHz
Boost clock speed	4 GHz	3.5 GHz
L1 cache	80 KB (per core)	112 KB (per core)
L2 cache	2 MB (per core)	2 MB (per core)
L3 cache	260 MB (shared)	144 MB (shared)
Chip lithography	Intel 7 nm	5 nm
Die size	2x 763 mm2	598 mm2
Maximum case temperature (TCase)	78 °C	85 °C
64 bit support	+	+

Compatibility

Information on Xeon Platinum 8558 and Xeon 6556P-B 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	FCLGA4677	Intel BGA 4368
Power consumption (TDP)	330 Watt	215 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon Platinum 8558 and Xeon 6556P-B. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AMX, 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	+	+
Deep Learning Boost	+	-

Security technologies

Xeon Platinum 8558 and Xeon 6556P-B technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	no data
SGX	Yes with Intel® SPS	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon Platinum 8558 and Xeon 6556P-B are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon Platinum 8558 and Xeon 6556P-B. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR5 @ 5200 MT/s (1 DPC)	DDR5
Maximum memory size	4 TB	no data
Max memory channels	8	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 8558 and Xeon 6556P-B.

PCIe version	5.0	5.0
PCI Express lanes	80	32

Pros & cons summary

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Recency	14 December 2023	24 February 2025
Physical cores	48	36
Threads	96	72
Power consumption (TDP)	330 Watt	215 Watt

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