AMD EPYC 7643 vs AMD EPYC 9645
We compared two server CPUs: AMD EPYC 7643 with 48 cores 2.3GHz and AMD EPYC 9645 with 96 cores 2.3GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.
Main Differences
AMD EPYC 7643 's Advantages
Lower TDP (225W vs 320W)
AMD EPYC 9645 's Advantages
Released 3 years and 7 months late
Higher specification of memory (6000 vs 3200)
Newer PCIe version (5 vs 4)
More modern manufacturing process (3nm vs 7nm)
Score
General Parameters
Mar 2021
Release Date
Oct 2024
AMD
Manufacturer
AMD
Server
Type
Server
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Milan
Core Architecture
Turin
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AMD Socket SP3
Socket
AMD Socket SP5
N/A
Integrated Graphics
N/A
EPYC (Zen 3 (Milan))
Generation
EPYC(Zen 5c (Turin))
Package
33.2 billions
Transistor Count
7 nm
Manufacturing Process
3 nm
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225 W
Power Consumption
320 W
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TSMC
Foundry
TSMC
8x81 mm²
Die Size
mm²
12 nm
I/O Process Size
6 nm
416 mm²
I/O Die Size
mm²
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CPU Performance
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Performance Cores
96
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Performance Core Threads
192
2.3 GHz
Performance Core Base Frequency
2.3 GHz
3.6 GHz
Performance Core Turbo Frequency
3.7 GHz
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48
Total Core Count
96
96
Total Thread Count
192
100 MHz
Bus Frequency
100 MHz
23.0
Multiplier
23.0
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-
64 KB per core
L1 Cache
80 KB per core
512 KB per core
L2 Cache
1 MB per core
256 MB shared
L3 Cache
256 MB shared
No
Unlocked Multiplier
No
CCDs
6
Cores per CCD
-
2
SMP
2
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-
-
-
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-
Memory Parameters
DDR4-3200
Memory Types
DDR5-6000
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Max Memory Size
6 TB
8
Max Memory Channels
12
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Max Memory Bandwidth
576 GB/s
Yes
ECC Memory Support
Yes
Graphics Card Parameters
-
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AI Accelerator
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