AMD Ryzen 9 8945HX vs AMD Ryzen 9 9950X3D Comparison

The AMD Ryzen 9 8945HX and AMD Ryzen 9 9950X3D are both 16-core, 32-thread processors, yet they target entirely different market segments and deliver benchmark results that diverge sharply depending on the workload. The 8945HX, a mobile part from the 8000 series, and the 9950X3D, a desktop part from the 9000 series, share a similar overall performance percentile but achieve it through different architectural means. The data shows a clear split: the 9950X3D dominates in the majority of head-to-head comparisons, while the 8945HX posts surprising wins in specific legacy benchmarks.

Head-to-Head Benchmarks

The most striking result in the head-to-head data is the complete inversion of scores in the Cinebench R15 and R23 tests. In Cinebench R15 multi-core, the 9950X3D wins decisively with a score of 6536 against the 8945HX’s 4305, a delta of -34.1% from the mobile chip’s perspective. However, the single-core R15 test flips the script: the 8945HX scores 607, while the 9950X3D scores only 350, giving the mobile part a 73.4% advantage. This pattern repeats in Cinebench R23, where the 8945HX wins single-core by a massive 166.9% (6030 vs 2259) and even edges out a multi-core win, scoring 42713 against the 9950X3D’s 42018, a slim 1.7% margin. These results suggest the 8945HX’s benchmark scores are unusually high in single-threaded scenarios relative to the desktop chip, likely reflecting differences in how the mobile part’s boost behavior is measured.

Beyond those legacy Cinebench tests, the 9950X3D takes control across the PassMark suite. The largest gap appears in PassMark physics, where the 9950X3D scores 5670 versus the 8945HX’s 2168, a 61.8% deficit for the mobile chip. Similarly, in PassMark find prime numbers, the 9950X3D’s 613 crushes the 8945HX’s 262, a 57.3% difference. The desktop processor also leads in extended instructions (73011 vs 49823, a 31.8% gap) and data compression (908421 vs 677755, a 25.4% gap). The 9950X3D’s wins are not limited to compute-heavy tasks; it also leads in more mundane operations like random string sorting, scoring 95423 against 78781, a 17.4% advantage, and integer math, with 243209 versus 195180, a 19.7% lead.

The 9950X3D also wins the synthetic multithreaded and single-thread PassMark tests, scoring 70255 and 4737, respectively, against the 8945HX’s 51405 and 3907. Those represent 26.8% and 17.5% deficits for the mobile chip. Data encryption shows a smaller gap, with the 9950X3D ahead by 8.3% (44536 vs 40836). In total, the 9950X3D wins 12 of the 15 head-to-head benchmark comparisons, while the 8945HX takes only three. The three wins for the 8945HX are all Cinebench-related, including the two single-core tests and the R23 multi-core test, which are notable outliers given the overall trend.

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen 9 8945HX has a slightly higher average benchmark score of 76212, compared to the 9950X3D’s 75779. This places the 8945HX 0.6% ahead of the 9950X3D in the nearestRivals data for the mobile chip.

Q: In how many head-to-head tests does each processor win?

A: The Ryzen 9 9950X3D wins 12 of the 15 head-to-head benchmarks, while the Ryzen 9 8945HX wins only 3. The 9950X3D’s wins span all PassMark tests, while the 8945HX’s wins are confined to Cinebench tests.

Q: What is the biggest performance gap between the two processors?

A: The largest delta is in Cinebench R23 single-core, where the 8945HX leads the 9950X3D by 166.9%, scoring 6030 versus 2259. The largest gap in favor of the 9950X3D is in PassMark physics, where it leads by 61.8% (5670 vs 2168).

Q: How do the two processors compare in memory bandwidth?

A: The 9950X3D offers higher memory bandwidth at 89.6 GB/s, while the 8945HX provides 83.2 GB/s. Both support DDR5 memory on a dual-channel bus, but the desktop part has a 7.7% bandwidth advantage.

Q: Do both processors support ECC memory?

A: No. The Ryzen 9 9950X3D supports ECC memory, while the Ryzen 9 8945HX does not. This is a clear differentiator for workstation-oriented builds using the desktop chip.

Q: What is the release date difference between the two?

A: The Ryzen 9 9950X3D was released earlier, on January 5, 2025, while the Ryzen 9 8945HX was released later, on April 22, 2025. Both are currently active in production.

Where Each One Wins

The Ryzen 9 9950X3D is the clear winner for compute-intensive and data-heavy workloads. Its PassMark victories in physics, prime number finding, extended instructions, and data compression indicate a strong advantage in scientific computing, cryptography, and data processing tasks. The 61.8% lead in physics and 57.3% lead in prime numbers are particularly large, suggesting the desktop chip’s higher clocks and larger cache pay off in workloads that benefit from raw integer throughput. For users running simulations, rendering, or heavy multitasking, the 9950X3D’s 26.8% lead in PassMark multithread makes it the better choice.

The Ryzen 9 8945HX, despite being a mobile part, wins in the Cinebench R15 single-core, R23 single-core, and R23 multi-core tests. The single-core wins are dramatic, with deltas of 73.4% and 166.9%, which could indicate that the mobile chip’s boost behavior in those specific tests is more aggressive or that the test conditions favored it. The 1.7% win in R23 multi-core is narrow, but it shows that the 8945HX can hold its own in certain multi-threaded scenarios despite its lower TDP. For users who prioritize legacy Cinebench scores, the 8945HX appears to offer competitive performance, but the data suggests this is an outlier rather than a general trend.

The 9950X3D also wins in single-threaded PassMark tests, beating the 8945HX by 17.5% (4737 vs 3907). This indicates that in most modern single-threaded benchmarks, the desktop part is faster, making the 8945HX’s Cinebench single-core wins suspicious of test-specific quirks. For general productivity, the 9950X3D’s leads in data encryption (8.3%) and random string sorting (17.4%) make it a more consistent performer.

Specification Differences

The two processors differ fundamentally in their sockets and market segments. The 8945HX uses AMD Socket FL1 and is classified as a mobile processor, while the 9950X3D uses AMD Socket AM5 and is a desktop part. The 9950X3D has a significantly higher TDP of 170 watts, compared to the 8945HX’s 55 watts, reflecting its desktop power envelope. Clock speeds also differ: the 9950X3D has a base clock of 4.30 GHz and a boost clock of 5.70 GHz, while the 8945HX has a base clock of 2.50 GHz and a boost clock of 5.40 GHz.

Memory bandwidth is higher on the 9950X3D at 89.6 GB/s, versus 83.2 GB/s for the 8945HX. The 9950X3D also supports ECC memory, which the 8945HX lacks. PCIe lane counts differ as well: the 8945HX provides 28 lanes (Gen 5), while the 9950X3D provides 24 lanes (Gen 5). The integrated graphics are different, with the 8945HX featuring the Radeon 610M and the 9950X3D featuring a generic Radeon Graphics. The 9950X3D has a launch MSRP of $699, while the 8945HX has no listed launch MSRP.

Architecture Differences

Architecturally, the two chips are from different generations and process nodes. The 8945HX is based on Zen 4 architecture, codenamed Dragon Range, and is manufactured on a 5 nm process at TSMC. The 9950X3D uses Zen 5 architecture, codenamed Granite Ridge, and is built on a 4 nm process, also at TSMC. The 9950X3D has more transistors, at 16,630 million, compared to the 8945HX’s 13,140 million, but the die sizes are nearly identical: 2x 71 mm² for the 8945HX and 2x 70.6 mm² for the 9950X3D.

Cache configurations differ significantly. The 8945HX has 64 KB of L1 cache per core, 1 MB of L2 cache per core, and 64 MB of L3 cache. The 9950X3D has 80 KB of L1 cache per core, 1 MB of L2 cache per core, and a much larger 128 MB of L3 cache. This doubling of L3 cache is a key architectural advantage for the 9950X3D, likely contributing to its strong performance in data-heavy PassMark tests like data compression and extended instructions. Both processors have unlocked multipliers, allowing overclocking, and both support DDR5 memory, but the 9950X3D’s larger cache and newer Zen 5 architecture give it a structural edge in sustained multi-threaded workloads. The 8945HX, despite its older Zen 4 architecture and smaller cache, manages to outperform in certain Cinebench tests, which the data suggests may be due to benchmark-specific conditions rather than a general architectural superiority.