AMD EPYC 7502 vs AMD Ryzen Threadripper 3990X Comparison

The AMD Ryzen Threadripper 3990X and AMD EPYC 7502 are both Zen 2-based AMD processors, but they are engineered for entirely different environments, and the benchmark data confirms a decisive performance hierarchy. Across every shared Cinebench test, the Threadripper 3990X wins outright, delivering a consistent 55% advantage in both single-threaded and multi-threaded workloads. The EPYC 7502 counters with server-specific features like ECC memory support and significantly higher memory bandwidth, making the choice between them a clear fork in the road: raw desktop compute versus enterprise reliability.

FAQ

Q: Which processor is faster in multi-threaded workloads?

A: The AMD Ryzen Threadripper 3990X wins all multi-threaded benchmarks by a 55% margin. For example, it scores 68,124 in Cinebench R23 multi-core versus 43,940 for the EPYC 7502.

Q: Is the Threadripper 3990X also faster in single-threaded tests?

A: Yes, the lead holds in single-threaded performance. The Threadripper 3990X scores 9,617 in Cinebench R23 single-core, while the EPYC 7502 scores 6,203, a 55% delta.

Q: What is the core and thread difference between the two?

A: The Threadripper 3990X has 64 cores and 128 threads, exactly double the EPYC 7502's 32 cores and 64 threads.

Q: Do both processors support ECC memory?

A: No. The EPYC 7502 supports ECC memory, while the Threadripper 3990X does not.

Q: How do their average benchmark scores compare?

A: The Threadripper 3990X has an average benchmark score of 12,786, placing it at the 68th percentile. The EPYC 7502 averages 12,709, at the 67th percentile. The Threadripper is 0.6% ahead in this metric.

Q: Which processor has a higher boost clock?

A: The Threadripper 3990X boosts up to 4.30 GHz, compared to the EPYC 7502's 3.35 GHz.

Architecture Differences

Both chips are built on TSMC's 7 nm process node with the Zen 2 architecture, but their physical and feature layouts diverge sharply. The Threadripper 3990X, codenamed Castle Peak, uses a massive 8x 74 mm² die configuration and packs 30,400 million transistors. It features 64 KB of L1 cache and 512 KB of L2 cache per core, plus a large 256 MB L3 cache. Its memory support is limited to DDR4 over a quad-channel bus, yielding 102.4 GB/s of bandwidth, and it lacks ECC memory support entirely.

The EPYC 7502, codenamed Rome, is a server-part with a different silicon layout. It uses a single 74 mm² die and a much lower transistor count of 3,800 million. Its cache hierarchy differs notably: 96 KB of L1 per core, 512 KB of L2 per core, and 128 MB of shared L3. The EPYC compensates for fewer cores with a more robust memory subsystem, supporting DDR4 over an eight-channel bus for 204.8 GB/s of bandwidth, and it includes ECC memory support, which the Threadripper lacks.

The platform sockets are incompatible. The Threadripper 3990X mounts to AMD Socket TRX4, while the EPYC 7502 uses AMD Socket SP3. The Threadripper offers PCIe Gen 4 with 64 lanes (CPU only), whereas the EPYC 7502 also supports PCIe Gen 4 but is not specified with a lane count in the data. The Threadripper has an unlocked multiplier for overclocking, while the EPYC is locked. The Threadripper belongs to the 3000 series and targets the desktop market, releasing in February 2020; the EPYC is part of the 7002 series, targets the server/workstation segment, and released earlier in August 2019. Neither processor includes integrated graphics.

The Verdict

The data points to a single conclusion for raw performance: the AMD Ryzen Threadripper 3990X is the superior processor. It wins 6 out of 6 head-to-head benchmark comparisons, with every win at a 55% margin. Its 64 cores and 128 threads, combined with a 4.30 GHz boost clock, give it an insurmountable lead over the EPYC 7502's 32 cores and 64 threads with a 3.35 GHz boost clock. The Threadripper's Cinebench R23 multi-core score of 68,124 versus 43,940 shows it is the clear choice for any workload that scales with core count, such as rendering or heavy compilation.

However, the EPYC 7502 is not without purpose. It is the only one of the two with ECC memory support, a critical feature for data integrity in server environments. It also offers double the memory bandwidth (204.8 GB/s versus 102.4 GB/s) through its eight-channel memory bus, which can matter in memory-bandwidth-bound server applications. The EPYC's lower TDP of 180 watts versus 280 watts also suggests it is easier to integrate into dense server chassis.

For a desktop workstation user who wants maximum compute throughput, the Threadripper 3990X is the obvious pick. For a server administrator prioritizing ECC reliability and memory throughput over raw core count, the EPYC 7502 is the data-backed choice. The benchmark averages are nearly identical (12,786 vs 12,709), but the Threadripper's per-test dominance is overwhelming.

Specification Differences

The two processors differ across nearly every core specification. The Threadripper 3990X has 64 cores and 128 threads, doubling the EPYC 7502's 32 cores and 64 threads. Base clocks differ: the Threadripper runs at 2.90 GHz, the EPYC at 2.50 GHz. Boost clocks also favor the Threadripper, with 4.30 GHz versus 3.35 GHz. The TDP is 280 watts for the Threadripper and 180 watts for the EPYC.

Memory channels and bandwidth are major differentiators. The Threadripper uses a quad-channel DDR4 interface with 102.4 GB/s bandwidth, while the EPYC uses an eight-channel interface with 204.8 GB/s. ECC memory support is exclusive to the EPYC. The L3 cache is larger on the Threadripper at 256 MB, versus 128 MB shared on the EPYC. The L1 cache per core is larger on the EPYC at 96 KB, versus 64 KB on the Threadripper; both have 512 KB of L2 per core.

Socket compatibility is entirely different: TRX4 for the Threadripper, SP3 for the EPYC. The Threadripper has 64 PCIe Gen 4 lanes (CPU only), while the EPYC's PCIe lane count is not specified. The Threadripper has an unlocked multiplier; the EPYC is locked. The Threadripper launched with a $3990 MSRP, while the EPYC has no launch MSRP listed. The Threadripper's die size is 8x 74 mm², versus a single 74 mm² for the EPYC, and transistor counts are 30,400 million versus 3,800 million.

Head-to-Head Benchmarks

The benchmark results are a clean sweep for the Threadripper 3990X, with every shared test showing a 55% performance delta. In Cinebench R15 multi-core, the Threadripper scores 6,866 against the EPYC's 4,428, a 55.1% lead. The single-core R15 test shows a similar gap: 969 versus 625, a 55% delta.

Moving to Cinebench R20, the Threadripper's multi-core score of 28,612 dwarfs the EPYC's 18,454, again a 55% margin. Single-core R20 follows the pattern: 4,039 versus 2,605. The most recent Cinebench R23 results confirm the trend. In multi-core, the Threadripper hits 68,124, while the EPYC manages 43,940. Single-core R23 shows 9,617 for the Threadripper versus 6,203 for the EPYC, with a 55% delta.

The win count is decisive: 6 wins for the Threadripper, 0 for the EPYC. Notably, the Threadripper's average benchmark score of 12,786 is only 0.6% higher than the EPYC's 12,709, but this aggregate metric masks the consistent per-test dominance. The Threadripper's nearest rivals include the Intel Xeon Gold 6348, against which it is 0.3% ahead, and the EPYC 7502 itself, against which it is 0.6% ahead. The EPYC's nearest rivals list shows it trailing the Threadripper by 0.6%, confirming the head-to-head results.

Where Each One Wins

The Threadripper 3990X wins in every compute benchmark that was run for both processors. Its 55% advantage in single-core tests (e.g., 9,617 versus 6,203 in R23) makes it the faster processor for lightly-threaded tasks and general responsiveness. Its 55% lead in multi-core tests (68,124 versus 43,940 in R23) means it is vastly better suited for heavily parallel workloads like 3D rendering, video encoding, and scientific simulations. The unlocked multiplier and higher boost clock (4.30 GHz) also give it an edge in any scenario where overclocking can further boost performance.

The EPYC 7502 wins in areas not covered by the Cinebench tests. Its ECC memory support is a definitive advantage for error-sensitive server workloads, such as database hosting or financial computations where a single bit-flip is unacceptable. Its eight-channel memory bus delivers 204.8 GB/s of bandwidth, double the Threadripper's 102.4 GB/s, which can be a decisive factor in memory-bound applications like large-scale data processing. The EPYC's lower TDP of 180 watts makes it a more power-efficient choice for multi-socket server deployments, and its SP3 socket is designed for server platforms with features like ECC and high memory density.

In practical terms, the Threadripper 3990X is the winner for a desktop workstation that must handle the most demanding multi-threaded tasks. The EPYC 7502 is the winner for a server environment where data integrity, memory bandwidth, and system reliability take precedence over raw core count. The benchmark data shows 0 wins for the EPYC in computational tests, but its server-specific features make it the right tool for a different job.