AMD Ryzen 9 9955HX3D vs AMD Ryzen Threadripper PRO 5965WX Comparison

Head-to-Head Benchmarks

The benchmark data presents a clear split between these two AMD processors, with the Ryzen Threadripper PRO 5965WX taking 10 of the 15 head-to-head tests while the Ryzen 9 9955HX3D claims 5. The most dramatic margin comes in Cinebench R23 single-core, where the Threadripper PRO 5965WX scores 7962 against the 9955HX3D’s 2159.5 — a 268.7% advantage. This is an outlier result, however, and it heavily skews the narrative if taken at face value.

Cinebench R15 single-core tells a similar story, with the Threadripper PRO 5965WX winning 802 to 332, a 141.6% lead. These single-core Cinebench figures are unusual for a Zen 3 part against a Zen 5 mobile chip, and the most plausible interpretation is that the 9955HX3D’s scores reflect power or thermal constraints during that specific workload. The PassMark single-thread test paints the opposite picture: the 9955HX3D scores 4511 versus 3337 for the Threadripper — a 26% win for the mobile processor.

In multi-core workloads, the Threadripper PRO 5965WX dominates the heavier Cinebench R23 test, scoring 56400 against 38161.5 for the 9955HX3D, a 47.8% margin. The 9955HX3D does manage to edge ahead in Cinebench R15 multi-core, 6042.5 to 5685, a 5.9% advantage. That result is counterintuitive given the R23 outcome, and it suggests the shorter R15 workload favors the 9955HX3D’s higher boost clock, while the sustained R23 load lets the Threadripper’s 24 cores pull away.

The PassMark suite shows consistent Threadripper PRO 5965WX advantages across most integer and data workloads. Data compression results are 1010067 for the Threadripper versus 785811 for the 9955HX3D, a 28.5% lead. Data encryption shows a 60% gap (63113 to 39446). Integer math favors the Threadripper by 26.4% (281247 to 222503). Random string sorting gives the Threadripper an 18.9% edge (99287 to 83497). Extended instructions are closer, with the Threadripper ahead 67300 to 62813, a 7.1% margin. Floating-point math also favors the Threadripper, 157708 to 144122, a 9.4% lead.

The 9955HX3D wins the PassMark multi-thread test narrowly, 66353 to 62674 for the Threadripper — a 5.9% margin that inverts the Cinebench R23 result. Physics scores go to the 9955HX3D, 4687 to 4251, a 9.3% advantage. The find-prime-numbers test is nearly identical, with the 9955HX3D winning 525 to 523, a 0.4% margin that is effectively a tie.

Overall average benchmark scores place the Threadripper PRO 5965WX at 98504 against 97453 for the 9955HX3D, a 1.1% difference. The nearest-rival data confirms these two are closely matched overall: the Threadripper sits between the EPYC 4585PX (99324, -0.8%) and the 9955HX3D (97453, +1.1%), while the 9955HX3D trails the Ryzen 9 PRO 9945 (96083, +1.4%) and the EPYC 4565P (95764, +1.8%).

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen Threadripper PRO 5965WX has an average benchmark score of 98504, while the AMD Ryzen 9 9955HX3D scores 97453. The Threadripper leads by 1.1%, and both processors sit in the 96th percentile or higher among all CPUs (97th for the Threadripper, 96th for the 9955HX3D).

Q: Is the Ryzen 9 9955HX3D faster in single-threaded workloads?

A: In PassMark single-thread tests, yes — the 9955HX3D scores 4511 versus 3337 for the Threadripper, a 26% advantage. However, Cinebench R15 and R23 single-core tests show the Threadripper winning by 141.6% and 268.7% respectively, which are anomalous results likely reflecting workload-specific behavior rather than a general trend.

Q: How do the two processors compare in multi-core rendering?

A: Cinebench R23 multi-core shows the Threadripper PRO 5965WX winning 56400 to 38161.5, a 47.8% lead. However, Cinebench R15 multi-core goes to the 9955HX3D, 6042.5 to 5685, a 5.9% margin. The PassMark multi-thread test also favors the 9955HX3D, 66353 to 62674.

Q: Which processor wins the most head-to-head benchmarks?

A: The Threadripper PRO 5965WX wins 10 of the 15 head-to-head tests. The 9955HX3D wins 5, which include PassMark single-thread, physics, find-prime-numbers, Cinebench R15 multi-core, and one of the duplicate single-thread entries.

Q: What is the difference in memory bandwidth between these two?

A: The Threadripper PRO 5965WX supports eight-channel DDR4 memory with a bandwidth of 204.8 GB/s. The 9955HX3D uses dual-channel DDR5 with 89.6 GB/s bandwidth. The Threadripper’s bandwidth is more than double, which contributes to its strong performance in data-heavy tasks like compression and encryption.

Q: Does the Ryzen 9 9955HX3D have integrated graphics?

A: Yes, the 9955HX3D includes a Radeon 610M integrated GPU. The Threadripper PRO 5965WX has no integrated graphics listed in its specifications.

Where Each One Wins

The Threadripper PRO 5965WX is the clear choice for sustained multi-core compute and data-intensive workloads. Its 47.8% lead in Cinebench R23 multi-core and 28.5% advantage in data compression make it suitable for video rendering, scientific simulation, and large-scale data processing. The 60% edge in data encryption and 26.4% lead in integer math point to strong performance in cryptographic workloads and general integer-heavy computation. The 204.8 GB/s memory bandwidth, enabled by eight-channel DDR4, gives it a structural advantage in any workload that streams large datasets through memory.

The 9955HX3D wins where single-thread responsiveness and power efficiency matter. Its 26% PassMark single-thread advantage indicates faster per-core execution for lightly threaded applications. The physics test victory (4687 to 4251, a 9.3% margin) suggests better performance in simulation or physics-based workloads that scale with fewer but faster cores. The 55W TDP versus 280W makes it suitable for mobile or thermally constrained systems where the Threadripper’s power draw would be prohibitive.

For mixed workloads, the PassMark multi-thread result (66353 for the 9955HX3D versus 62674 for the Threadripper) is notable — the mobile chip wins despite having 8 fewer cores and 16 fewer threads. This suggests the Zen 5 architecture’s efficiency per core compensates for the core-count deficit in certain parallel tasks. The find-prime-numbers result is essentially a tie at 525 to 523, indicating parity in that specific integer workload.

Specification Differences

The two processors differ substantially across nearly every specification category. The Threadripper PRO 5965WX has 24 cores and 48 threads, versus 16 cores and 32 threads for the 9955HX3D. Base clocks are 3.80 GHz for the Threadripper and 2.50 GHz for the 9955HX3D, while boost clocks are 4.50 GHz and 5.40 GHz respectively. The Threadripper has a 280W TDP; the 9955HX3D draws 55W.

Sockets differ entirely: the Threadripper uses AMD Socket WRX8, while the 9955HX3D uses AMD Socket FL1. The Threadripper is a server/workstation part, while the 9955HX3D is classified as mobile. Memory support is DDR4 for the Threadripper and DDR5 for the 9955HX3D, with eight-channel versus dual-channel buses. PCIe generations differ: Gen 4 with 128 lanes for the Threadripper, Gen 5 with 28 lanes for the 9955HX3D.

The Threadripper’s launch MSRP is $2399; the 9955HX3D has no launch MSRP listed. The multiplier is locked on the Threadripper and unlocked on the 9955HX3D. Release dates are March 2022 for the Threadripper and January 2025 for the 9955HX3D. The 9955HX3D includes a Radeon 610M integrated GPU; the Threadripper has none listed.

Architecture Differences

The Threadripper PRO 5965WX is built on Zen 3 architecture with the codename Chagall PRO, part of the 5000 series. It uses a 7 nm process node from TSMC, with 16,600 million transistors across a die size of 4x 81 mm². The 9955HX3D uses Zen 5 architecture with the codename Fire Range, part of the 9000 series. It is fabricated on a 4 nm TSMC process, with 16,630 million transistors on a die size of 2x 70.6 mm². The transistor counts are nearly identical (16,600M vs 16,630M), but the 9955HX3D achieves this on a smaller combined die area and a more advanced node.

Cache configurations differ in per-core allocation. The Threadripper has 64 KB of L1 cache per core, 512 KB of L2 per core, and 128 MB of L3 cache. The 9955HX3D has 80 KB of L1 per core, 1 MB of L2 per core, and 128 MB of L3 cache. Both have the same total L3 capacity, but the 9955HX3D’s larger per-core L1 and L2 caches benefit single-thread performance. The 9955HX3D’s 5.40 GHz boost clock is a full 900 MHz higher than the Threadripper’s 4.50 GHz, which explains its PassMark single-thread advantage.

The Threadripper’s 128 MB L3 cache is a defining feature for server workloads, and the 9955HX3D matches it despite having fewer cores. The 9955HX3D’s memory bandwidth of 89.6 GB/s is less than half the Threadripper’s 204.8 GB/s, which is the most consequential architectural difference for memory-bound tasks. The Threadripper’s 128 PCIe Gen 4 lanes versus the 9955HX3D’s 28 Gen 5 lanes reflects their different target platforms — workstation expansion versus mobile integration.