AMD EPYC 7643P vs Xeon 6556P B
We compared two server CPUs: AMD EPYC 7643P with 48 cores 2.3GHz and Xeon 6556P B with 36 cores 2.3GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.
Main Differences
AMD EPYC 7643P 's Advantages
Larger L3 cache size (256MB vs 144MB)
Xeon 6556P B 's Advantages
Released 1 years and 5 months late
Higher specification of memory (6400 vs 3200)
Newer PCIe version (5 vs 4)
More modern manufacturing process (5nm vs 7nm)
Lower TDP (215W vs 225W)
Score
General Parameters
Sep 2023
Release Date
Feb 2025
AMD
Manufacturer
Intel
Server
Type
Server
Milan
Core Architecture
Granite Rapids
AMD Socket SP3
Socket
Intel BGA 4368
N/A
Integrated Graphics
N/A
EPYC (Zen 3 (Milan))
Generation
Xeon 6 (Granite Rapids-D)
Package
33.2 billions
Transistor Count
-
7 nm
Manufacturing Process
5 nm
225 W
Power Consumption
215 W
TSMC
Foundry
Intel
8x81 mm²
Die Size
598 mm²
12 nm
I/O Process Size
10 nm
416 mm²
I/O Die Size
-
CPU Performance
2.3 GHz
Performance Core Base Frequency
2.3 GHz
3.6 GHz
Performance Core Turbo Frequency
3.5 GHz
48
Total Core Count
36
96
Total Thread Count
72
100 MHz
Bus Frequency
100 MHz
23.0
Multiplier
23.0
64 KB per core
L1 Cache
112 KB per core
512 KB per core
L2 Cache
2 MB per core
256 MB shared
L3 Cache
144 MB shared
No
Unlocked Multiplier
No
8
Cores per CCD
-
1
SMP
2
-
AVX-512 FMA Ports
2
Memory Parameters
DDR4-3200
Memory Types
DDR5-6400
-
Max Memory Size
1.13 TB
8
Max Memory Channels
4
Yes
ECC Memory Support
Yes
Miscellaneous
4
PCIe Version
5
128
PCIe Lanes
32
