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AMD Ryzen 9 7900 vs AMD Ryzen 9 9900X3D: Comparison
Ryzen 9 7900 vs Ryzen 9 9900X3D: the l3 cache difference
On l3 cache the spread is 50%, Ryzen 9 7900 64 MB against Ryzen 9 9900X3D 128 MB, so Ryzen 9 9900X3D takes it. There is a split on release year as well, 2023 on the Ryzen 9 7900 versus 2025 on the Ryzen 9 9900X3D. Microarchitecture is not the same on both, Zen 4 on the Ryzen 9 7900 versus Zen 5 on the Ryzen 9 9900X3D. Base power is not the same on both, 65 W on the Ryzen 9 7900 versus 120 W on the Ryzen 9 9900X3D.
Ryzen 9 7900 vs Ryzen 9 9900X3D: which one fits your build
Buy the Ryzen 9 7900 for mainstream desktops and everyday productivity, though it is not built for competitive gaming rigs and heavy content creation. The Ryzen 9 9900X3D is the one to take for high-refresh-rate gaming and flagship gaming builds, though it is not the pick for budget builds and non-gaming workstation loads. Our rating of the Ryzen 9 7900 (7.9/10): the AMD Ryzen 9 7900 is a well-rounded mainstream desktop chip that covers everyday computing and light gaming without a premium price tag. Our rating of the Ryzen 9 9900X3D (9.2/10): the AMD Ryzen 9 9900X3D is one of the best gaming CPUs available, its huge L3 cache translating directly into higher in-game frame rates.
Where the two are identical
The common ground is wider than the gap: total cores, performance cores, efficiency cores, total threads and integrated graphics are identical here. They match on 4 further specifications as well.
Frequently asked questions
Do the Ryzen 9 7900 and Ryzen 9 9900X3D differ on p-core boost clock?
Yes. P-Core Boost Clock reads 4.9 GHz on the Ryzen 9 7900 versus 5.5 GHz on the Ryzen 9 9900X3D.
Is the Form Factor the same on the Ryzen 9 7900 and Ryzen 9 9900X3D?
It is. Both are listed at Desktop, so it is not a reason to pick one over the other.
Specs and benchmarks
Form Factor
- AMD Ryzen 9 7900
- Desktop
- AMD Ryzen 9 9900X3D
- Desktop
Codename
- AMD Ryzen 9 7900
- Raphael
- AMD Ryzen 9 9900X3D
- Granite Ridge
Release Year
- AMD Ryzen 9 7900
- 2023
- AMD Ryzen 9 9900X3D
- 2025
TDP
- AMD Ryzen 9 7900
- 65 W
- AMD Ryzen 9 9900X3D
- 120 W
iGPU
- AMD Ryzen 9 7900
- AMD Radeon Graphics (2 CUs, RDNA 2)
- AMD Ryzen 9 9900X3D
- AMD Radeon Graphics
Market Segment
- AMD Ryzen 9 7900
- Desktop
- AMD Ryzen 9 9900X3D
- Desktop
Microarchitecture
- AMD Ryzen 9 7900
- Zen 4 (7000 series)
- AMD Ryzen 9 9900X3D
- Zen 5 (9000 series)
Socket
- AMD Ryzen 9 7900
- AM5 (LGA 1718)
- AMD Ryzen 9 9900X3D
- AM5
Process Node
- AMD Ryzen 9 7900
- 5 nm
- AMD Ryzen 9 9900X3D
- 4 nm
Total Cores
- AMD Ryzen 9 7900
- 12
- AMD Ryzen 9 9900X3D
- 12
Performance Cores
- AMD Ryzen 9 7900
- 12
- AMD Ryzen 9 9900X3D
- 12
Efficiency Cores
- AMD Ryzen 9 7900
- 0
- AMD Ryzen 9 9900X3D
- 0
Total Threads
- AMD Ryzen 9 7900
- 24
- AMD Ryzen 9 9900X3D
- 24
SMT Enabled
- AMD Ryzen 9 7900
- Yes
- AMD Ryzen 9 9900X3D
- Yes
P-Core Base Clock
- AMD Ryzen 9 7900
- 3.8 GHz
- AMD Ryzen 9 9900X3D
- 4.4 GHz
P-Core Boost Clock
- AMD Ryzen 9 7900
- 4.9 GHz
- AMD Ryzen 9 9900X3D
- 5.5 GHz
L3 Cache
- AMD Ryzen 9 7900
- 64 MB-50%
- AMD Ryzen 9 9900X3D
- 128 MBBest
Base Power
- AMD Ryzen 9 7900
- 65 W
- AMD Ryzen 9 9900X3D
- 120 W
Memory Type
- AMD Ryzen 9 7900
- DDR5
- AMD Ryzen 9 9900X3D
- DDR5
Integrated Graphics
- AMD Ryzen 9 7900
- Yes
- AMD Ryzen 9 9900X3D
- Yes
Which one should you pick?
Choose 7900 if you already have it on hand or find it at a lower price.
Choose 9900X3D if you want the higher L3 cache (128 MB vs 64 MB).
Price comparison
| Retailer | AMD Ryzen 9 7900 | AMD Ryzen 9 9900X3D |
|---|---|---|
| Newegg | View on Newegg | View on Newegg |
| Amazon | View on Amazon | View on Amazon |
| Best Buy | View on Best Buy |
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Verdict
AMD Ryzen 9 7900
7.9 / 10 Expert Rating
The AMD Ryzen 9 7900 is a well-rounded mainstream desktop chip that covers everyday computing and light gaming without a premium price tag.
AMD Ryzen 9 9900X3D
9.2 / 10 Expert Rating
The AMD Ryzen 9 9900X3D is one of the best gaming CPUs available, its huge L3 cache translating directly into higher in-game frame rates.