AMD Ryzen 7 8840HX vs AMD Ryzen 9 9950X3D Comparison

FAQ

Q: How does the AMD Ryzen 9 9950X3D compare to the AMD Ryzen 7 8840HX in overall average benchmark score?

A: The Ryzen 9 9950X3D records an average benchmark score of 75,779, while the Ryzen 7 8840HX sits at 71,797. The 9950X3D sits in the 95th percentile of all CPUs, and the 8840HX is in the 94th percentile.

Q: Which processor wins the most head-to-head benchmark comparisons?

A: The Ryzen 9 9950X3D wins all 13 recorded head-to-head comparisons. The Ryzen 7 8840HX wins zero.

Q: What is the largest single-benchmark advantage for the Ryzen 9 9950X3D?

A: The largest delta appears in PassMark physics, where the 9950X3D scores 5,670 versus 2,185 for the 8840HX, a 159.5% advantage.

Q: Are there any benchmark categories where the Ryzen 7 8840HX comes close?

A: The closest margin is in PassMark single-thread performance, where the 9950X3D leads by 19.7% (4,737 versus 3,958). The smallest multi-thread delta is 66% in PassMark integer math.

Q: What are the core and thread counts for each processor?

A: The Ryzen 9 9950X3D has 16 cores and 32 threads. The Ryzen 7 8840HX has 12 cores and 24 threads.

Q: Do both processors support the same memory type and PCIe generation?

A: Yes, both support DDR5 memory and PCIe Gen 5. However, the 9950X3D has 24 CPU lanes, while the 8840HX has 28 CPU lanes.

The Verdict

The data points to a clear separation in performance class. The Ryzen 9 9950X3D is a desktop flagship with 16 cores, 32 threads, and a 170 W TDP. The Ryzen 7 8840HX is a mobile part with 12 cores, 24 threads, and a 55 W TDP. Every recorded benchmark favors the 9950X3D, and the margins are substantial in most cases.

Buyers seeking maximum multi-threaded throughput for rendering, compilation, or simulation workloads should choose the 9950X3D. Its Cinebench R23 multi-core score of 42,018 versus 25,265 for the 8840HX represents a 66.3% advantage. The 9950X3D also dominates in PassMark multi-thread (70,255 versus 41,732, a 68.3% gap) and PassMark integer math (243,209 versus 146,506, a 66% gap).

The Ryzen 7 8840HX is the pick for mobile deployments where the 55 W TDP is a critical constraint. Its active production status and mobile socket (AMD Socket FL1) make it suitable for laptops or compact systems. The 8840HX still delivers respectable single-thread performance (3,958 in PassMark single-thread) and its 94th percentile ranking indicates it is a strong performer in its class.

For pure performance, the 9950X3D is the unambiguous choice. For power-sensitive mobile builds, the 8840HX is the only one of the two that fits that form factor. The 9950X3D carries a launch MSRP of $699; the 8840HX has no recorded launch MSRP.

Head-to-Head Benchmarks

The Ryzen 9 9950X3D wins all 13 head-to-head comparisons. The most decisive win is in PassMark physics, where the 9950X3D scores 5,670 versus 2,185 for the 8840HX, a 159.5% margin. This suggests a very large advantage in simulated physics calculations, likely reflecting both the higher core count and the much higher boost clock (5.70 GHz versus 5.10 GHz).

PassMark extended instructions show a 99.9% advantage (73,011 versus 36,527). This is effectively double the throughput for workloads using advanced instruction sets. PassMark find prime numbers shows a 101.6% lead (613 versus 304), another case where the 9950X3D roughly doubles the 8840HX's output.

PassMark floating point math shows an 84.1% lead (159,724 versus 86,747). PassMark data compression shows an 83% lead (908,421 versus 496,427). These are both heavily parallel workloads, and the 9950X3D's 16 cores versus 12 cores, combined with its higher clock speeds, explain the large gaps.

The smallest wins are in single-thread tests. PassMark single-thread shows a 19.7% lead (4,737 versus 3,958), and Cinebench R23 single-core shows a 21.6% lead (2,259 versus 1,857). These margins are still significant, but they are the closest the 8840HX gets to the 9950X3D. This indicates that the 9950X3D's per-core performance advantage is moderate, while its scaling advantage in parallel workloads is much larger.

Cinebench R23 multi-core shows a 66.3% lead (42,018 versus 25,265). PassMark multi-thread shows a 68.3% lead (70,255 versus 41,732). PassMark integer math shows a 66% lead (243,209 versus 146,506). PassMark random string sorting shows a 64.6% lead (95,423 versus 57,971). PassMark data encryption shows a 48.9% lead (44,536 versus 29,919).

The consistent pattern is that the 9950X3D leads by roughly two-thirds to three-quarters in most parallel workloads, and by roughly one-fifth in single-thread workloads. The physics and prime-number tests are outliers where the lead exceeds 100%, suggesting workloads that are particularly sensitive to the combination of high core count and high clock speed.

Specification Differences

The two processors differ in nearly every core specification. The Ryzen 9 9950X3D has 16 cores and 32 threads, while the Ryzen 7 8840HX has 12 cores and 24 threads. Base clocks are 4.30 GHz versus 2.90 GHz, and boost clocks are 5.70 GHz versus 5.10 GHz.

TDP is a major differentiator: 170 W for the 9950X3D versus 55 W for the 8840HX. The socket types are entirely different: AMD Socket AM5 for the desktop part, AMD Socket FL1 for the mobile part.

The 9950X3D uses a 4 nm process node, while the 8840HX uses 5 nm. Both are fabricated by TSMC. Transistor counts are 16,630 million versus 13,140 million. Die sizes are 2x 70.6 mm² versus 2x 71 mm².

Cache configurations differ significantly. The 9950X3D has 80 KB L1 per core, 1 MB L2 per core, and 128 MB L3. The 8840HX has 64 KB L1 per core, 1 MB L2 per core, and 64 MB shared L3.

Memory bandwidth is higher on the 9950X3D at 89.6 GB/s versus 83.2 GB/s. ECC memory support is present on the 9950X3D but absent on the 8840HX. PCIe lane counts differ: 24 lanes for the 9950X3D, 28 for the 8840HX.

Integrated graphics differ: the 9950X3D has Radeon Graphics, while the 8840HX has Radeon 610M. Market segments are Desktop versus Mobile. Release dates are 2025-01-05 for the 9950X3D and 2025-04-22 for the 8840HX. Both have unlocked multipliers.

Architecture Differences

The Ryzen 9 9950X3D uses Zen 5 architecture with the Granite Ridge codename, part of the 9000 series. The Ryzen 7 8840HX uses Zen 4 architecture with the Dragon Range codename, part of the 8000 series. The 9950X3D is built on a 4 nm process, while the 8840HX uses 5 nm.

The 9950X3D's L3 cache is 128 MB, double the 8840HX's 64 MB. The L1 cache is also larger per core: 80 KB versus 64 KB. The 9950X3D's larger L3 is likely a factor in its strong performance in the PassMark physics test, where the 159.5% lead is the largest of any benchmark.

The transistor count difference is notable: 16,630 million versus 13,140 million. This reflects both the extra cores and the larger cache on the 9950X3D. The die size is nearly identical (2x 70.6 mm² versus 2x 71 mm²), which is interesting given the different node sizes: the 4 nm 9950X3D packs more transistors into a slightly smaller die.

The 8840HX's higher PCIe lane count (28 versus 24) is an architectural difference that may matter for systems with many expansion cards or NVMe drives. However, the 9950X3D's memory bandwidth advantage (89.6 GB/s versus 83.2 GB/s) is more relevant for CPU-bound workloads.

ECC memory support is exclusive to the 9950X3D, which may be a deciding factor for workstation or server-adjacent builds where data integrity is critical. The 8840HX lacks ECC support entirely.

The integrated graphics differ as well: Radeon Graphics on the 9950X3D versus Radeon 610M on the 8840HX. Neither is a dedicated GPU, but the 9950X3D's implementation is part of the newer Zen 5 platform.

Where Each One Wins

The Ryzen 9 9950X3D wins every benchmark category in the database. Its largest advantages are in PassMark physics (159.5%), PassMark prime numbers (101.6%), and PassMark extended instructions (99.9%). These are all highly parallel or instruction-heavy workloads that benefit from the 16-core configuration and the 5.70 GHz boost clock.

The 9950X3D is the clear choice for multi-threaded productivity: Cinebench R23 multi-core (42,018), PassMark multi-thread (70,255), and PassMark integer math (243,209) all show leads of roughly two-thirds or more over the 8840HX. It is also strong in single-thread workloads, with a 19.7% lead in PassMark single-thread and a 21.6% lead in Cinebench R23 single-core.

The Ryzen 7 8840HX wins none of the benchmark comparisons, but its strengths lie outside raw performance. Its 55 W TDP makes it suitable for laptops or compact mobile systems where the 9950X3D's 170 W TDP would be impractical. Its 28 PCIe lanes provide more expansion connectivity than the 9950X3D's 24, which could benefit systems with multiple high-speed devices. Its 5 nm process node is one generation behind the 9950X3D's 4 nm, but the 8840HX still reaches a 94th percentile ranking across all CPUs.

For single-thread responsiveness, the 8840HX is not far behind: its PassMark single-thread score of 3,958 is within 19.7% of the 9950X3D's 4,737. In everyday tasks that rely on single-core performance, the difference may be less noticeable than the multi-thread gaps suggest.

The 9950X3D is the winner for desktops, workstations, and any scenario where performance is the primary goal. The 8840HX is the only option for mobile or low-power builds, and it still delivers a 94th percentile overall ranking despite its lower core count and clock speeds.