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AMD Ryzen 9 7945HX3D vs AMD Ryzen 9 8940HX: Comparison
What is the difference between Ryzen 9 7945HX3D and Ryzen 9 8940HX?
The gap that matters here is l3 cache: Ryzen 9 7945HX3D 128 MB against Ryzen 9 8940HX 64 MB, which puts Ryzen 9 7945HX3D 50% ahead. There is a split on p-core boost clock as well, 5.4 GHz on the Ryzen 9 7945HX3D versus 5.2 GHz on the Ryzen 9 8940HX. P-core base clock is not the same on both, 2.3 GHz on the Ryzen 9 7945HX3D versus 2.9 GHz on the Ryzen 9 8940HX. They differ on socket too, FL1 on the Ryzen 9 7945HX3D versus BGA on the Ryzen 9 8940HX. Release year is not the same on both, 2023 on the Ryzen 9 7945HX3D versus 2025 on the Ryzen 9 8940HX.
Ryzen 9 7945HX3D vs Ryzen 9 8940HX: which one fits your build
The Ryzen 9 7945HX3D suits high-end gaming laptops and mobile workstations, though it is not the pick for thin-and-light laptops and battery-focused ultraportables. Buy the Ryzen 9 8940HX for gaming laptops and mobile content creation, though it is the wrong buy for thin-and-light ultraportables and all-day battery life needs. Our rating of the Ryzen 9 7945HX3D (9.1/10): the AMD Ryzen 9 7945HX3D is the pinnacle of mobile gaming performance, bringing 3D V-Cache and desktop-class core counts to a laptop chassis. Our rating of the Ryzen 9 8940HX (8.5/10): the AMD Ryzen 9 8940HX delivers desktop-class multi-core performance in a laptop form factor, ideal for demanding gaming and creation workloads.
Where the two are identical
Where they agree, they agree completely, total cores, performance cores, efficiency cores, total threads and tdp included, so the decision does not turn on any of those. They match on 7 further specifications as well.
Frequently asked questions
Is the Integrated Graphics the same on the Ryzen 9 7945HX3D and Ryzen 9 8940HX?
It is. Both are listed at Yes, so it is not a reason to pick one over the other.
Specs and benchmarks
Form Factor
- AMD Ryzen 9 7945HX3D
- Laptop
- AMD Ryzen 9 8940HX
- Laptop
Codename
- AMD Ryzen 9 7945HX3D
- Dragon Range
- AMD Ryzen 9 8940HX
- Dragon Range
Release Year
- AMD Ryzen 9 7945HX3D
- 2023
- AMD Ryzen 9 8940HX
- 2025
TDP
- AMD Ryzen 9 7945HX3D
- 55 W
- AMD Ryzen 9 8940HX
- 55 W
iGPU
- AMD Ryzen 9 7945HX3D
- AMD Radeon 610M Graphics (RDNA 2)
- AMD Ryzen 9 8940HX
- AMD Radeon 610M Graphics (RDNA 2)
Market Segment
- AMD Ryzen 9 7945HX3D
- Laptop
- AMD Ryzen 9 8940HX
- Laptop
Microarchitecture
- AMD Ryzen 9 7945HX3D
- Zen 4 (7040/9955 Dragon Range)
- AMD Ryzen 9 8940HX
- Zen 4 (Dragon Range)
Socket
- AMD Ryzen 9 7945HX3D
- FL1
- AMD Ryzen 9 8940HX
- BGA (soldered, mobile)
Process Node
- AMD Ryzen 9 7945HX3D
- 5 nm
- AMD Ryzen 9 8940HX
- 5 nm
Total Cores
- AMD Ryzen 9 7945HX3D
- 16
- AMD Ryzen 9 8940HX
- 16
Performance Cores
- AMD Ryzen 9 7945HX3D
- 16
- AMD Ryzen 9 8940HX
- 16
Efficiency Cores
- AMD Ryzen 9 7945HX3D
- 0
- AMD Ryzen 9 8940HX
- 0
Total Threads
- AMD Ryzen 9 7945HX3D
- 32
- AMD Ryzen 9 8940HX
- 32
SMT Enabled
- AMD Ryzen 9 7945HX3D
- Yes
- AMD Ryzen 9 8940HX
- Yes
P-Core Base Clock
- AMD Ryzen 9 7945HX3D
- 2.3 GHz
- AMD Ryzen 9 8940HX
- 2.9 GHz
P-Core Boost Clock
- AMD Ryzen 9 7945HX3D
- 5.4 GHz
- AMD Ryzen 9 8940HX
- 5.2 GHz
L3 Cache
- AMD Ryzen 9 7945HX3D
- 128 MBBest
- AMD Ryzen 9 8940HX
- 64 MB-50%
Base Power
- AMD Ryzen 9 7945HX3D
- 55 W
- AMD Ryzen 9 8940HX
- 55 W
Memory Type
- AMD Ryzen 9 7945HX3D
- DDR5
- AMD Ryzen 9 8940HX
- DDR5
Integrated Graphics
- AMD Ryzen 9 7945HX3D
- Yes
- AMD Ryzen 9 8940HX
- Yes
Which one should you pick?
Choose 7945HX3D if you want the higher L3 cache (128 MB vs 64 MB).
Choose 8940HX if you already have it on hand or find it at a lower price.
Verdict
AMD Ryzen 9 7945HX3D
9.1 / 10 Expert Rating
The AMD Ryzen 9 7945HX3D is the pinnacle of mobile gaming performance, bringing 3D V-Cache and desktop-class core counts to a laptop chassis.
AMD Ryzen 9 8940HX
8.5 / 10 Expert Rating
The AMD Ryzen 9 8940HX delivers desktop-class multi-core performance in a laptop form factor, ideal for demanding gaming and creation workloads.