AMD Ryzen Threadripper 3990X vs Intel Xeon Gold 6348 Comparison

The AMD Ryzen Threadripper 3990X and Intel Xeon Gold 6348 occupy different corners of the high-core-count market, yet their benchmark averages place them nearly side-by-side. The Threadripper 3990X posts an average benchmark score of 12,786, while the Xeon Gold 6348 trails by a mere 0.3% at 12,746. This statistical near-tie, however, masks a complete divergence in workload behavior: the AMD part wins every single head-to-head rendering test, while the Intel part counters with platform-level features like eight-channel memory and ECC support. The data suggests these are not direct competitors but rather solutions for different definitions of "performance."

Where Each One Wins

The benchmark split is absolute: the AMD Ryzen Threadripper 3990X wins all six head-to-head tests, covering Cinebench R15, R20, and R23 in both single-core and multi-core modes. The Intel Xeon Gold 6348 wins zero head-to-head tests. This makes the use-case split straightforward from a raw throughput perspective. The Threadripper 3990X is the clear choice for any workload measured by these Cinebench render tests, which stress pure compute density and clock speed.

However, the Xeon Gold 6348 wins in areas not covered by the benchmark suite. Its specification sheet shows eight-channel memory support with 204.8 GB/s of bandwidth, exactly double the 102.4 GB/s of the Threadripper 3990X's quad-channel setup. It also supports ECC memory, a feature the AMD part lacks. For memory-bound server workloads, database transactions, or large in-memory analytics where data integrity and bandwidth matter more than raw Cinebench scores, the Xeon's platform characteristics give it an edge that the benchmark data cannot capture. The Threadripper 3990X targets desktop enthusiasts and content creators; the Xeon Gold 6348 targets server racks where error correction and memory throughput are non-negotiable.

Architecture Differences

The two processors come from fundamentally different design philosophies. The AMD Ryzen Threadripper 3990X uses the Zen 2 architecture on a 7 nm process from TSMC, built on the Castle Peak codename. It packs 64 cores and 128 threads, with a base clock of 2.90 GHz and a boost clock of 4.30 GHz. Its cache hierarchy includes 64 KB of L1 per core, 512 KB of L2 per core, and a massive 256 MB of L3 cache. The Intel Xeon Gold 6348, by contrast, uses the Ice Lake architecture on Intel's own 10 nm process, with the Ice Lake-SP codename. It offers 28 cores and 56 threads, clocked at 2.60 GHz base and 3.50 GHz boost. Its L1 is the same 64 KB per core, but L2 doubles to 1 MB per core, and L3 drops to 42 MB shared.

The transistor count and die size tell a stark story. The AMD part lists 30,400 million transistors across 8x 74 mm² dies, while the Intel part lists no transistor count or die size in the data. The Threadripper 3990X also has an unlocked multiplier, making it overclockable; the Xeon Gold 6348 has a locked multiplier. Both use DDR4 memory and offer Gen 4 PCIe with 64 lanes, but the memory channels differ: quad-channel for AMD versus eight-channel for Intel. The Threadripper 3990X was released on 2020-02-06 with a launch MSRP of $3990, while the Xeon Gold 6348 launched later on 2021-04-05 with no listed MSRP. The AMD part is classified as Desktop, the Intel part as Server/Workstation.

Head-to-Head Benchmarks

The Cinebench results are remarkably consistent in their margins. In Cinebench R15 multi-core, the Threadripper 3990X scores 6,866 versus the Xeon's 4,441, a 54.6% advantage. The single-core R15 test shows 969 versus 626, a 54.8% delta. Moving to R20, the multi-core gap remains at 54.6% with scores of 28,612 and 18,507; the single-core test shows 4,039 versus 2,612, again 54.6%. Cinebench R23 repeats the pattern: 68,124 versus 44,066 in multi-core and 9,617 versus 6,221 in single-core, both at 54.6% deltas.

The consistency of the 54.6% delta across every multi-core test is striking. It suggests the performance gap scales linearly with core count and clock speed rather than revealing any architectural bottleneck. The Threadripper 3990X has 64 cores versus 28, a 2.29x core advantage, but the Xeon's higher per-core L2 cache and Intel's Ice Lake efficiency narrow the raw scaling. The single-core advantage of 54.8% in R15 and 54.6% in R20/R23 is equally telling: the AMD part's 4.30 GHz boost clock outpaces the Intel's 3.50 GHz by 22.9%, yet the benchmark delta is larger, indicating that Zen 2's IPC or memory latency gives an additional edge in lightly threaded workloads.

Notably, the Threadripper 3990X also has benchmark data for 3DMark tests that the Xeon lacks entirely. Those scores range from 695 in single-thread to 18,441 in max-threads, with intermediate results of 1,383 (2 threads), 2,721 (4 threads), 5,182 (8 threads), and 9,975 (16 threads). The Xeon Gold 6348 has no corresponding 3DMark entries, meaning the gaming or graphics-adjacent performance comparison remains incomplete. The Threadripper's Geekbench scores of 20,912 multi-core and 1,472 single-core also have no Intel counterpart in this data set.

The Verdict

The data points to a simple conclusion for rendering workloads: the AMD Ryzen Threadripper 3990X wins decisively, with a 54.6% advantage in every Cinebench multi-core test and a similar single-core lead. Its 64 cores and 128 threads, combined with a 4.30 GHz boost clock and 256 MB of L3 cache, deliver performance that the Xeon Gold 6348 cannot match in these specific benchmarks. The Threadripper 3990X also holds a slight edge in overall average benchmark score, 12,786 versus 12,746, placing it in the 68th percentile of all CPUs versus the Xeon's 67th.

However, the Xeon Gold 6348 is not without merit for specific buyers. Its eight-channel memory with 204.8 GB/s bandwidth and ECC support make it the only option here for memory-sensitive server applications that require error correction. The Threadripper 3990X lacks ECC entirely and offers half the memory bandwidth. The Xeon's 42 MB of L3 cache, while smaller than the AMD's 256 MB, is shared across fewer cores, potentially offering more consistent per-core cache behavior. For a workstation that will run Cinebench-style render tasks, the Threadripper 3990X is the obvious pick. For a server running memory-intensive, fault-tolerant workloads, the Xeon Gold 6348's platform features outweigh its benchmark deficit.

FAQ

Q: Which processor has more cores?

A: The AMD Ryzen Threadripper 3990X has 64 cores and 128 threads, while the Intel Xeon Gold 6348 has 28 cores and 56 threads.

Q: What is the performance difference in multi-core Cinebench R23?

A: The Threadripper 3990X scores 68,124, which is 54.6% higher than the Xeon Gold 6348's 44,066.

Q: Does the Intel Xeon Gold 6348 support ECC memory?

A: Yes, the Xeon Gold 6348 supports ECC memory, while the AMD Threadripper 3990X does not.

Q: How does memory bandwidth compare between the two?

A: The Xeon Gold 6348 offers 204.8 GB/s via eight-channel memory, exactly double the Threadripper 3990X's 102.4 GB/s via quad-channel memory.

Q: Which processor has a higher boost clock?

A: The AMD Threadripper 3990X boosts to 4.30 GHz, compared to the Intel Xeon Gold 6348's 3.50 GHz.

Q: Are these processors overclockable?

A: The Threadripper 3990X has an unlocked multiplier, but the Xeon Gold 6348 is locked.

Specification Differences

| Field | AMD Ryzen Threadripper 3990X | Intel Xeon Gold 6348 |

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

| Cores | 64 | 28 |

| Threads | 128 | 56 |

| Base Clock | 2.90 GHz | 2.60 GHz |

| Boost Clock | 4.30 GHz | 3.50 GHz |

| TDP | 280 W | 235 W |

| Socket | AMD Socket TRX4 | Intel Socket 4189 |

| Architecture | Zen 2 | Ice Lake |

| Codename | Castle Peak | Ice Lake-SP |

| Generation | Ryzen Threadripper (Zen 2 (Castle Peak)) | Xeon Gold (Ice Lake-SP) |

| Process Node | 7 nm | 10 nm |

| Foundry | TSMC | Intel |

| Transistors | 30,400 million | Not listed |

| Die Size | 8x 74 mm² | Not listed |

| L2 Cache | 512 KB (per core) | 1 MB (per core) |

| L3 Cache | 256 MB | 42 MB (shared) |

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

| Memory Bandwidth | 102.4 GB/s | 204.8 GB/s |

| ECC Memory | No | Yes |

| Market Segment | Desktop | Server/Workstation |

| Release Date | 2020-02-06 | 2021-04-05 |

| Launch MSRP | $3990 | Not listed |

| Multiplier Unlocked | Yes | No |