AMD EPYC 7763 vs AMD Ryzen Threadripper PRO 9975WX Comparison

The AMD Ryzen Threadripper PRO 9975WX and AMD EPYC 7763 represent two distinct philosophies for high-core-count computing. The 9975WX pairs 32 Zen 5 cores with aggressive clock speeds, while the 7763 offers 64 Zen 3 cores at more modest frequencies. Benchmark results show the 9975WX winning 14 of 17 head-to-head tests, with the 7763 countering in a few specialized workloads. The average benchmark score lands at 186447 for the 9975WX versus 179916 for the 7763, a 3.6% overall advantage for the newer part.

Head-to-Head Benchmarks

The most striking pattern in the head-to-head data is the uniform 30.1% lead the 9975WX holds across every Cinebench test. In Cinebench R23 multi-core, the 9975WX scores 93553 against the 7763’s 71902; in single-core, it scores 13207 versus 10150. The same 30.1% delta appears in R15 and R20, both multi- and single-core. This consistency indicates a fundamental per-thread performance gap rather than a workload-specific quirk.

Outside Cinebench, the 9975WX’s biggest wins come in Passmark single-thread (75.6% ahead: 4422 vs 2518) and physics (61.2% ahead: 12426 vs 7708). It also leads Passmark multithread by 30.9% (110740 vs 84591) and extended instructions by 29.2% (126987 vs 98294). Smaller but still decisive wins appear in random string sorting (12.6%: 205730 vs 182676), data compression (2.5%: 1669837 vs 1628973), and floating point math (1.5%: 292100 vs 287919).

The 7763 takes three tests. The largest is data encryption, where it scores 121001 versus 94634, a 21.8% advantage. It also wins integer math by 6.1% (516920 vs 485286) and find prime numbers by a razor-thin 0.7% (668 vs 663). These results suggest the 7763’s 64 cores can overcome its lower per-core performance in certain throughput-heavy, memory-latency-sensitive tasks, but the overall benchmark distribution heavily favors the 9975WX.

Architecture Differences

The two processors are built on entirely different generations of AMD’s core designs. The 9975WX uses Zen 5 architecture on a 4 nm TSMC process, while the 7763 uses Zen 3 on a 7 nm TSMC process. Transistor counts are nearly identical — 33,260 million for the 9975WX versus 33,200 million for the 7763 — but the die layout differs: the 9975WX has four 70.6 mm² dies, while the 7763 has eight 81 mm² dies.

Core counts are inverted relative to clock speeds. The 9975WX offers 32 cores and 64 threads, with a base clock of 4.00 GHz and boost of 5.40 GHz. The 7763 offers 64 cores and 128 threads, but its base clock drops to 2.45 GHz and boost to 3.50 GHz. The 9975WX compensates for its lower core count with higher IPC and clocks, while the 7763 relies on raw parallelism.

Cache hierarchies also diverge. Both have 64 KB of L1 per core, but the 9975WX has 1 MB of L2 per core versus 512 KB on the 7763. The 7763 counters with a larger shared L3: 256 MB versus 128 MB on the 9975WX. Memory support differs as well: the 9975WX uses DDR5 with eight-channel support and a bandwidth of 409.6 GB/s, while the 7763 uses DDR4 with eight channels and 204.8 GB/s. PCIe generations also differ — Gen 5 on the 9975WX versus Gen 4 on the 7763, both with 128 lanes.

The 9975WX is an unlocked multiplier part on AMD Socket sTR5, while the 7763 is locked on Socket SP3. TDP ratings are 350 W for the 9975WX and 280 W for the 7763. The 9975WX has a launch MSRP of $4099; the 7763 has a launch MSRP of $7890.

Where Each One Wins

The 9975WX dominates in single-threaded and lightly threaded workloads. Its Passmark single-thread score of 4422 is 75.6% higher than the 7763’s 2518, and its Cinebench R23 single-core result of 13207 is 30.1% ahead. This makes it the clear choice for applications that depend on per-core responsiveness, such as interactive simulation, code compilation, and any workload with serial bottlenecks.

In multi-threaded rendering and general compute, the 9975WX also leads despite having half the cores. Its Cinebench R23 multi-core score of 93553 versus 71902, a 30.1% gap, shows that its higher clocks and newer architecture more than offset the core deficit. Passmark multithread confirms this: 110740 vs 84591, a 30.9% advantage. The 9975WX also wins in physics, extended instructions, floating point, and random string sorting.

The 7763’s wins are concentrated in encryption and integer-heavy math. Its 121001 data encryption score is 21.8% higher, and its 516920 integer math score is 6.1% higher. The find prime numbers test is essentially a tie, with the 7763 ahead by only 0.7%. These workloads often benefit from a larger L3 cache (256 MB) and a higher core count, even at lower clocks. For users running cryptographic workloads, large integer matrix operations, or prime-number searches, the 7763 retains a measurable edge.

Overall, the 9975WX is the stronger all-round performer, with an average benchmark score 3.6% higher than the 7763. Its wins are broader and larger, while the 7763’s victories are narrower and more specialized.

FAQ

Q: Which processor has more cores?

A: The AMD EPYC 7763 has 64 cores and 128 threads, while the AMD Ryzen Threadripper PRO 9975WX has 32 cores and 64 threads.

Q: How much faster is the 9975WX in single-threaded performance?

A: In Passmark single-thread, the 9975WX scores 4422 versus the 7763’s 2518, a 75.6% advantage. In Cinebench R23 single-core, it leads by 30.1% (13207 vs 10150).

Q: Does the 7763 win any benchmark tests?

A: Yes, it wins three of the 17 head-to-head tests: data encryption (21.8% ahead), integer math (6.1% ahead), and find prime numbers (0.7% ahead).

Q: What memory types do the two CPUs support?

A: The 9975WX supports DDR5 with eight-channel memory and 409.6 GB/s bandwidth. The 7763 supports DDR4 with eight channels and 204.8 GB/s bandwidth.

Q: Which CPU has a higher boost clock?

A: The 9975WX boosts to 5.40 GHz, while the 7763 boosts to 3.50 GHz.

Q: How do their average benchmark scores compare?

A: The 9975WX has an average benchmark score of 186447, which is 3.6% higher than the 7763’s 179916.

Specification Differences

| Field | AMD Ryzen Threadripper PRO 9975WX | AMD EPYC 7763 |

|-------|-----------------------------------|----------------|

| Cores | 32 | 64 |

| Threads | 64 | 128 |

| Base clock | 4.00 GHz | 2.45 GHz |

| Boost clock | 5.40 GHz | 3.50 GHz |

| TDP | 350 W | 280 W |

| Socket | AMD Socket sTR5 | AMD Socket SP3 |

| Architecture | Zen 5 | Zen 3 |

| Codename | Shimada Peak | Milan |

| Process node | 4 nm | 7 nm |

| Transistors | 33,260 million | 33,200 million |

| Die size | 4x 70.6 mm² | 8x 81 mm² |

| L2 cache per core | 1 MB | 512 KB |

| L3 cache (shared) | 128 MB | 256 MB |

| Memory support | DDR5 | DDR4 |

| Memory bandwidth | 409.6 GB/s | 204.8 GB/s |

| PCIe | Gen 5, 128 lanes | Gen 4, 128 lanes |

| Multiplier | Unlocked | Locked |

| Launch MSRP | $4099 | $7890 |