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AMD Ryzen 9 5900HX vs AMD Ryzen 9 6900HX: Comparison
What is the difference between Ryzen 9 5900HX and Ryzen 9 6900HX?
They are built to different briefs, and p-core boost clock shows it, Ryzen 9 5900HX 4.6 GHz against Ryzen 9 6900HX 4.9 GHz. There is a split on product line as well, Ryzen 9 on the Ryzen 9 5900HX versus Ryzen on the Ryzen 9 6900HX. Form factor is not the same on both, Laptop on the Ryzen 9 5900HX versus Laptops, Desktops on the Ryzen 9 6900HX. They differ on release year too, 2021 on the Ryzen 9 5900HX versus 2022 on the Ryzen 9 6900HX. There is a split on igpu as well, AMD Radeon Graphics on the Ryzen 9 5900HX versus AMD Radeon 680M on the Ryzen 9 6900HX. Microarchitecture is not the same on both, Zen 3, Ryzen 5000 Series "Cezanne" on the Ryzen 9 5900HX versus Zen 3+ on the Ryzen 9 6900HX.
Which should you buy, Ryzen 9 5900HX or Ryzen 9 6900HX?
Take the Ryzen 9 5900HX for desktop-replacement gaming laptops wanting genuinely top-tier AMD mobile Zen 3 performance. It is the wrong buy for buyers wanting the absolute highest clocks in AMD's HX lineup, the 5980HX offers a modest additional edge at the same core count. Buy the Ryzen 9 6900HX for mainstream desktop builds and everyday productivity, though it is not built for extreme overclocking (unless K/X-series) and workstation-class multi-threaded workloads.
Where the two are identical
Where they agree, they agree completely, total cores, performance cores, efficiency cores, total threads and p-core base clock included, so the decision does not turn on any of those. They match on 12 further specifications as well.
Frequently asked questions
Do the Ryzen 9 5900HX and Ryzen 9 6900HX differ on socket?
Yes. Socket reads FP6 on the Ryzen 9 5900HX versus FP7 on the Ryzen 9 6900HX.
Is the L3 Cache the same on the Ryzen 9 5900HX and Ryzen 9 6900HX?
It is. Both are listed at 16 MB, so it is not a reason to pick one over the other.
Specs and benchmarks
Product Line
- AMD Ryzen 9 5900HX
- Ryzen 9
- AMD Ryzen 9 6900HX
- Ryzen
Form Factor
- AMD Ryzen 9 5900HX
- Laptop
- AMD Ryzen 9 6900HX
- Laptops, Desktops
Model Number
- AMD Ryzen 9 5900HX
- 5900HX
- AMD Ryzen 9 6900HX
- 6900HX
Codename
- AMD Ryzen 9 5900HX
- Cezanne
- AMD Ryzen 9 6900HX
- Rembrandt
Release Year
- AMD Ryzen 9 5900HX
- 2021
- AMD Ryzen 9 6900HX
- 2022
iGPU
- AMD Ryzen 9 5900HX
- AMD Radeon Graphics
- AMD Ryzen 9 6900HX
- AMD Radeon 680M
Market Segment
- AMD Ryzen 9 5900HX
- Laptop
- AMD Ryzen 9 6900HX
- Laptop
Microarchitecture
- AMD Ryzen 9 5900HX
- Zen 3, Ryzen 5000 Series "Cezanne"
- AMD Ryzen 9 6900HX
- Zen 3+
Socket
- AMD Ryzen 9 5900HX
- FP6
- AMD Ryzen 9 6900HX
- FP7
Socket Status
- AMD Ryzen 9 5900HX
- End of Life
- AMD Ryzen 9 6900HX
- End of Life
Process Node
- AMD Ryzen 9 5900HX
- 7 nm
- AMD Ryzen 9 6900HX
- 6 nm
Total Cores
- AMD Ryzen 9 5900HX
- 8
- AMD Ryzen 9 6900HX
- 8
Performance Cores
- AMD Ryzen 9 5900HX
- 8
- AMD Ryzen 9 6900HX
- 8
Efficiency Cores
- AMD Ryzen 9 5900HX
- 0
- AMD Ryzen 9 6900HX
- 0
Total Threads
- AMD Ryzen 9 5900HX
- 16
- AMD Ryzen 9 6900HX
- 16
SMT Enabled
- AMD Ryzen 9 5900HX
- Yes
- AMD Ryzen 9 6900HX
- Yes
P-Core Base Clock
- AMD Ryzen 9 5900HX
- 3.3 GHz
- AMD Ryzen 9 6900HX
- 3.3 GHz
P-Core Boost Clock
- AMD Ryzen 9 5900HX
- 4.6 GHz
- AMD Ryzen 9 6900HX
- 4.9 GHz
Unlocked Multiplier
- AMD Ryzen 9 5900HX
- Yes
- AMD Ryzen 9 6900HX
- Yes
L2 Cache
- AMD Ryzen 9 5900HX
- 4 MB
- AMD Ryzen 9 6900HX
- 4 MB
L3 Cache
- AMD Ryzen 9 5900HX
- 16 MB
- AMD Ryzen 9 6900HX
- 16 MB
Base Power
- AMD Ryzen 9 5900HX
- 45 W
- AMD Ryzen 9 6900HX
- 45 W
Memory Type
- AMD Ryzen 9 5900HX
- DDR4, LPDDR4
- AMD Ryzen 9 6900HX
- DDR5Best
Max Memory Speed
- AMD Ryzen 9 5900HX
- 4266 MT/s
- AMD Ryzen 9 6900HX
- 6400 MT/sBest
Memory Channels
- AMD Ryzen 9 5900HX
- 2
- AMD Ryzen 9 6900HX
- 2
ECC Support
- AMD Ryzen 9 5900HX
- No
- AMD Ryzen 9 6900HX
- No
Integrated Graphics
- AMD Ryzen 9 5900HX
- Yes
- AMD Ryzen 9 6900HX
- Yes
iGPU Model
- AMD Ryzen 9 5900HX
- AMD Radeon Vega 8 Graphics
- AMD Ryzen 9 6900HX
- AMD Radeon 680M
iGPU Compute Units
- AMD Ryzen 9 5900HX
- 8
- AMD Ryzen 9 6900HX
- 12
Copilot Plus Certified
- AMD Ryzen 9 5900HX
- No
- AMD Ryzen 9 6900HX
- No
PCIe Generation
- AMD Ryzen 9 5900HX
- PCIe 3.0
- AMD Ryzen 9 6900HX
- PCIe 4.0
Retail Availability
- AMD Ryzen 9 5900HX
- Soldered Only
- AMD Ryzen 9 6900HX
- Soldered Only
Which one should you pick?
Choose 5900HX if you want the higher L2 cache (4 MB vs 4 MB), the higher L3 cache (16 MB vs 16 MB) and the higher memory channels (2 vs 2).
Choose 6900HX if you already have it on hand or find it at a lower price.