AMD EPYC 7451 vs AMD Ryzen Threadripper 1950X Comparison

The AMD Ryzen Threadripper 1950X and AMD EPYC 7451 are both 14 nm Zen parts from AMD, but they target different segments: the Threadripper is a desktop processor, while the EPYC is a server/workstation part. The database records show a consistent performance advantage for the Threadripper across all Cinebench tests, despite the EPYC having more cores. This analysis examines the head-to-head results, architectural differences, and what the data implies for different use cases.

Head-to-Head Benchmarks

The head-to-head benchmark set includes six Cinebench tests, and the Threadripper 1950X wins every one of them. In Cinebench R15 multi-core, the Threadripper scores 2362 against the EPYC's 2061, a lead of 14.6%. The single-core R15 test shows a slightly larger gap: 333 versus 290, a 14.8% advantage. Moving to Cinebench R20, the multi-core result is 9844 for the Threadripper and 8589 for the EPYC, again a 14.6% difference. The single-core R20 test follows the same pattern: 1389 versus 1212, a 14.6% lead. Cinebench R23 multi-core gives 23440 against 20450, a 14.6% margin, and the single-core R23 test shows 3309 versus 2887, also 14.6%. The consistency of these deltas is striking: five of the six tests land exactly at 14.6%, with only the R15 single-core test deviating at 14.8%.

The Threadripper also has Geekbench results in the database: 7989 multi-core and 1183 single-core. The EPYC 7451 has no recorded Geekbench scores, so no direct comparison is possible there. The overall benchmark average for the Threadripper is 6231, while the EPYC sits at 5915. The Threadripper's percentile rank among all CPUs is 62, compared to 61 for the EPYC. These numbers reinforce the head-to-head picture: the Threadripper is ahead in every measured workload, and the margin is remarkably uniform.

What does this uniformity imply? The EPYC has 24 cores and 48 threads, while the Threadripper has 16 cores and 32 threads. Yet the Threadripper still wins multi-core tests by a wide margin. The likely explanation lies in clock speeds: the Threadripper has a base clock of 3.40 GHz and a boost of 4.00 GHz, while the EPYC runs at 2.30 GHz base and 3.20 GHz boost. The higher clocks appear to more than compensate for the EPYC's additional cores in these Cinebench workloads, which may not scale perfectly with core count. The data does not show any test where the EPYC takes the lead, so the Threadripper's advantage is comprehensive within the recorded benchmarks.

Where Each One Wins

Given that the Threadripper wins all six head-to-head tests, the "wins" split is one-sided: 6 for the Threadripper, 0 for the EPYC. However, the EPYC's strengths lie outside the Cinebench suite. The EPYC supports ECC memory, which the Threadripper does not. It also offers eight-channel memory with a bandwidth of 170.6 GB/s, double the Threadripper's quad-channel 85.3 GB/s. The EPYC's L3 cache is 64 MB shared, twice the Threadripper's 32 MB. These features point to workloads that are memory-bandwidth sensitive, require error correction, or need large shared caches for data-intensive server tasks.

The Threadripper, on the other hand, is a desktop part with a higher boost clock and a lower core count. Its performance in the Cinebench tests suggests it is well suited for single-threaded and moderately threaded applications where clock speed matters more than raw core count. The EPYC's 24 cores and 48 threads could be advantageous in highly parallel server workloads that scale beyond 16 cores, but the recorded benchmarks do not reflect that advantage. The data shows that in the specific tests available, the Threadripper is faster, but the EPYC's memory and ECC capabilities make it a better fit for enterprise environments where data integrity and memory throughput are critical.

The market segments reinforce this split: the Threadripper is listed as Desktop, while the EPYC is Server/Workstation. The EPYC's socket is AMD Socket SP3, and it has PCIe Gen 3 support, though the Threadripper's PCIe details are not recorded. The EPYC's release date is earlier (2017-06-28) than the Threadripper's (2017-08-09), but both are still in active production. For a user building a high-end desktop workstation, the Threadripper's benchmark dominance makes it the obvious choice. For a server administrator who needs ECC and high memory bandwidth, the EPYC's feature set is more compelling, even if its Cinebench scores are lower.

Architecture Differences

Both processors share the same Zen architecture, 14 nm process node, and GlobalFoundries as the foundry. They also have identical L1 and L2 cache sizes: 96 KB per core and 512 KB per core, respectively. The TDP is the same at 180 watts, and both have an unlocked multiplier. The differences begin with the die configuration. The Threadripper uses two dies, each 213 mm², for a total of 9,600 million transistors. The EPYC uses a single 213 mm² die with 4,800 million transistors. This means the Threadripper has twice the transistor count and a dual-die layout, while the EPYC is a single-die design.

The L3 cache differs significantly: the Threadripper has 32 MB, while the EPYC has 64 MB shared. The memory subsystem is also different: the Threadripper uses quad-channel DDR4 with 85.3 GB/s bandwidth, while the EPYC uses eight-channel DDR4 with 170.6 GB/s. ECC memory is supported on the EPYC but not on the Threadripper. The sockets are different as well: the Threadripper uses AMD Socket SP3r2, while the EPYC uses AMD Socket SP3. The codenames reflect their lineages: the Threadripper is Zen (Whitehaven), and the EPYC is Zen (Naples). The generation labels are "Ryzen Threadripper" and "EPYC", respectively.

The market segment is a clear divider: Desktop for the Threadripper, Server/Workstation for the EPYC. The release dates are close, with the EPYC launching on 2017-06-28 and the Threadripper on 2017-08-09. The Threadripper has a launch MSRP of $999, while the EPYC's launch MSRP is not recorded. The part numbers are YD195XA8UGAAE for the Threadripper and PS7451BDVHCAF for the EPYC. These architectural differences explain why the EPYC is positioned for servers: its larger L3 cache, eight-channel memory, and ECC support are server-oriented features, even though they do not translate into Cinebench wins.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 7451 has 24 cores and 48 threads, while the AMD Ryzen Threadripper 1950X has 16 cores and 32 threads.

Q: Which processor has a higher boost clock?

A: The Threadripper 1950X boosts to 4.00 GHz, while the EPYC 7451 boosts to 3.20 GHz. The Threadripper also has a higher base clock at 3.40 GHz versus 2.30 GHz.

Q: Does the EPYC 7451 support ECC memory?

A: Yes, the EPYC 7451 supports ECC memory. The Threadripper 1950X does not support ECC.

Q: What is the memory bandwidth difference?

A: The EPYC 7451 has eight-channel memory with 170.6 GB/s bandwidth, while the Threadripper 1950X has quad-channel memory with 85.3 GB/s.

Q: Which processor has a larger L3 cache?

A: The EPYC 7451 has 64 MB shared L3 cache, while the Threadripper 1950X has 32 MB.

Q: Which processor won all head-to-head benchmarks?

A: The Threadripper 1950X won all six Cinebench tests, with deltas of 14.6% in five tests and 14.8% in the R15 single-core test.

Specification Differences

| Field | AMD Ryzen Threadripper 1950X | AMD EPYC 7451 |

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

| Cores | 16 | 24 |

| Threads | 32 | 48 |

| Base Clock | 3.40 GHz | 2.30 GHz |

| Boost Clock | 4.00 GHz | 3.20 GHz |

| Socket | AMD Socket SP3r2 | AMD Socket SP3 |

| Codename | Zen (Whitehaven) | Zen (Naples) |

| Generation | Ryzen Threadripper | EPYC |

| Die Size | 2x 213 mm² | 213 mm² |

| Transistors | 9,600 million | 4,800 million |

| L3 Cache | 32 MB | 64 MB (shared) |

| Memory Bus | Quad-channel | Eight-channel |

| Memory Bandwidth | 85.3 GB/s | 170.6 GB/s |

| ECC Memory | No | Yes |

| PCIe | Not recorded | Gen 3 |

| Market Segment | Desktop | Server/Workstation |

| Release Date | 2017-08-09 | 2017-06-28 |

| Launch MSRP | $999 | Not recorded |

| Part Number | YD195XA8UGAAE | PS7451BDVHCAF |

Both processors share the same TDP (180 W), process node (14 nm), foundry (GlobalFoundries), L1 cache (96 KB per core), L2 cache (512 KB per core), architecture (Zen), and unlocked multiplier.

The Verdict

The data is unambiguous: the AMD Ryzen Threadripper 1950X outperforms the AMD EPYC 7451 in every recorded Cinebench test, with a consistent 14.6% lead. The Threadripper's higher clock speeds and dual-die design give it a decisive edge in these workloads, despite having fewer cores. For anyone building a desktop system where Cinebench-style performance matters, the Threadripper is the clear choice.

The EPYC 7451, however, is not without merit. Its 24 cores, 48 threads, 64 MB L3 cache, eight-channel memory, and ECC support make it a better fit for server environments that require data integrity and high memory throughput. The EPYC's lower clock speeds and single-die design may explain its lower benchmark scores, but its feature set is tailored for a different class of workloads. The database shows no benchmark where the EPYC wins, but the architectural differences suggest it could excel in memory-bound or ECC-dependent tasks that are not represented in the Cinebench suite.

The verdict depends on the use case. If the priority is raw performance in the measured benchmarks, the Threadripper 1950X wins outright. If the priority is server-grade features like ECC, eight-channel memory, and a larger shared cache, the EPYC 7451 is the appropriate part, even though its benchmark scores are lower. The Threadripper's launch MSRP of $999 provides a reference point, but the EPYC's pricing is not recorded, so no cost comparison is possible. Ultimately, the data points to the Threadripper for desktop performance and the EPYC for server workloads, with the benchmark results favoring the former in all recorded tests.