AMD Ryzen Threadripper 9980X vs Intel Core Ultra X9 388H Comparison

Head-to-Head Benchmarks

The recorded data shows a sweep for the AMD Ryzen Threadripper 9980X across all 17 benchmark comparisons, with the Intel Core Ultra X9 388H failing to secure a single win. The margins, however, vary dramatically depending on whether the workload is heavily multithreaded or lighter single-thread work.

The largest deltas appear in throughput-oriented tests. In PassMark integer math, the Threadripper scores 872071 against 90882 for the Intel part, a lead of 859.6%. Compression work shows a similar pattern: 2974534 versus 361763, a 722.2% advantage. Extended instructions follow at 664.6% difference, with scores of 228959 and 29943 respectively. These are absolute routs, reflecting the massive core-count disparity between the two processors.

Cinebench results tell the same story. The R23 multi-core run has the AMD part at 130529 versus 18911 for the Intel chip, a 590.2% delta. R15 multi-core shows 13157 against 2955, a 345.2% gap, while R20 multi-core lands at 54822 versus 13101, a 318.5% difference. The trend is consistent: each additional core count step translates into enormous aggregate performance advantages.

Single-thread results are far closer, yet the AMD part still wins every test. Cinebench R23 single-core favors the Threadripper by 737.4% (18427 against 2200.5), but this is an outlier driven by the Intel part's unusually low score in that specific test. PassMark single-thread shows a much tighter race: 4537 versus 4280, a mere 6% delta. Cinebench R15 single-core records 1857 against 309.5, a 500% gap, while R20 single-core is 7739 versus 1849, a 318.6% difference. The PassMark numbers suggest that at the core level, the two architectures are closer in raw speed than the Cinebench figures imply.

Other workload categories fall in between. Floating-point math shows a 396.7% lead for the AMD part (559003 versus 112550), data encryption a 451.6% edge (157137 versus 28490), and random string sorting a 563.7% difference (292083 versus 44010). Find prime numbers is the smallest multi-threaded margin at 114.8% (769 versus 358), while physics simulation records a 148% gap (8001 versus 3226). Multithread PassMark completes the picture with a 284.8% difference (141641 versus 36811).

The average benchmark scores place the Threadripper at 321753, versus 44466 for the Intel part. The percentile rankings confirm the separation: the AMD processor sits at the 99th percentile among all CPUs, while the Intel chip reaches the 88th percentile.

Architecture Differences

The architectural gap explains the performance chasm. The AMD Ryzen Threadripper 9980X uses Zen 5, codenamed Shimada Peak, fabricated on a 4 nm process at TSMC. It packs 64 cores and 128 threads. The Intel Core Ultra X9 388H uses Panther Lake architecture, built on Intel's 3 nm process, with 16 cores and 16 threads.

The Threadripper part is built from eight chiplets, each with a die size of 70.6 mm², totaling 66,520 million transistors. The Intel part has no recorded die size or transistor count in the database. This structural difference alone accounts for much of the benchmark gap.

Memory architecture also diverges sharply. The AMD processor supports DDR5 over a quad-channel bus, yielding 204.8 GB/s of memory bandwidth. The Intel chip uses LPDDR5X over a dual-channel bus, providing 153.6 GB/s. The Threadripper also supports ECC memory, while the Intel part does not.

Cache hierarchies follow different philosophies. The Threadripper allocates 64 KB of L1 per core, 1 MB of L2 per core, and a massive 256 MB of shared L3. The Intel part gives each core 192 KB of L1, 3 MB of L2, and 18 MB of shared L3. The per-core L2 advantage on the Intel side is notable, but the Threadripper's total cache pool is in a different class.

PCI Express connectivity differs by an order of magnitude. The AMD part provides Gen 5 with 80 lanes from the CPU, while the Intel chip offers Gen 5 with just 4 lanes. This affects expandability for storage, accelerators, and multi-GPU configurations.

The Intel part includes integrated graphics, specifically an Arc B390 GPU. The AMD Threadripper lists no integrated graphics, marked as N/A.

Where Each One Wins

The data shows the AMD Ryzen Threadripper 9980X wins every recorded benchmark. There is no test in the database where the Intel Core Ultra X9 388H comes out ahead. The question is not which processor wins, but which workloads see the largest versus smallest margins.

The Threadripper's biggest wins are in integer math, compression, and extended instruction workloads. These are classic throughput tasks that scale with core count and memory bandwidth. The 859.6% integer math delta and the 722.2% compression delta indicate workloads where the 64-core part can fully saturate its resources.

The smallest margin appears in PassMark single-thread testing, where the Threadripper leads by only 6%. This suggests that for purely serial workloads, the architectural efficiency of the Intel Panther Lake core is competitive. The Intel part's 5.10 GHz boost clock versus the AMD part's 5.40 GHz boost clock shows both can reach high frequencies, though the AMD chip has a slight edge.

The Intel part's wins, if any exist in real-world use, would come from power-constrained environments. Its TDP is 25 watts versus the Threadripper's 350 watts. The Intel chip operates in a mobile segment with integrated graphics, making it suitable for compact systems where the Threadripper's power and socket requirements would be impractical. However, the database records no benchmark where the Intel part outperforms.

Specification Differences

The two processors differ across nearly every specification field.

The AMD Ryzen Threadripper 9980X uses 64 cores and 128 threads, while the Intel Core Ultra X9 388H uses 16 cores and 16 threads. The AMD part has a base clock of 3.20 GHz and a boost clock of 5.40 GHz. The Intel part has a base clock of 2.10 GHz and a boost clock of 5.10 GHz.

Thermal design power is 350 watts for the AMD part and 25 watts for the Intel part. The AMD processor uses AMD Socket sTR5, while the Intel chip uses Intel BGA 2540. The Threadripper has an unlocked multiplier; the Intel part is locked.

Process node differs: 4 nm TSMC for AMD, 3 nm Intel for the Intel part. The AMD part reports 66,520 million transistors across eight 70.6 mm² dies; the Intel part reports no transistor or die size data.

Cache: the AMD part has 64 KB L1 per core, 1 MB L2 per core, and 256 MB L3. The Intel part has 192 KB L1 per core, 3 MB L2 per core, and 18 MB shared L3.

Memory: DDR5 quad-channel with 204.8 GB/s bandwidth and ECC support for AMD. LPDDR5X dual-channel with 153.6 GB/s bandwidth and no ECC for Intel.

PCIe: Gen 5 with 80 lanes for AMD, Gen 5 with 4 lanes for Intel. The AMD part has no integrated graphics; the Intel part has Arc B390.

Release dates differ: the Threadripper launched on 2025-07-29, the Intel part on 2026-01-04. The AMD part carries a launch MSRP of $4999. The Intel part has no recorded launch MSRP.

FAQ

Q: Which processor has more cores?

A: The AMD Ryzen Threadripper 9980X has 64 cores and 128 threads, while the Intel Core Ultra X9 388H has 16 cores and 16 threads.

Q: What is the largest performance gap between the two?

A: The largest delta is in PassMark integer math, where the AMD part scores 872071 versus 90882 for the Intel part, a 859.6% difference.

Q: Is there any benchmark where the Intel part wins?

A: No. The database records 17 head-to-head benchmark comparisons, and the AMD Ryzen Threadripper 9980X wins all 17.

Q: How close are the single-thread scores?

A: The closest result is PassMark single-thread, where the AMD part scores 4537 and the Intel part scores 4280, a 6% difference. Other single-thread tests show larger gaps.

Q: What is the memory bandwidth difference?

A: The AMD part provides 204.8 GB/s over quad-channel DDR5, while the Intel part provides 153.6 GB/s over dual-channel LPDDR5X.

Q: Which processor has integrated graphics?

A: The Intel Core Ultra X9 388H includes an Arc B390 integrated GPU. The AMD Ryzen Threadripper 9980X has no integrated graphics, listed as N/A.

The Verdict

The benchmark data makes the positioning unambiguous. The AMD Ryzen Threadripper 9980X delivers dominant multi-threaded performance, with average benchmark scores 7.2 times higher than the Intel Core Ultra X9 388H (321753 versus 44466). It sits at the 99th percentile among all CPUs, while the Intel part reaches the 88th percentile.

The Threadripper is the choice for workloads that scale with core count, memory bandwidth, and PCIe lanes. Its 64 cores, 128 threads, 256 MB L3 cache, quad-channel DDR5, and 80 PCIe Gen 5 lanes make it suited for heavy compute, large dataset manipulation, and multi-device configurations. The 350 watt TDP and desktop sTR5 socket requirement indicate a system built for maximum throughput rather than portability.

The Intel Core Ultra X9 388H serves a different purpose entirely. Its 25 watt TDP, BGA 2540 socket, and mobile market segment point to compact, power-conscious systems. The integrated Arc B390 GPU removes the need for a discrete graphics card. Its 16 cores and 18 MB shared L3 cache are modest by comparison, but the 5.10 GHz boost clock and the near-parity 6% single-thread PassMark delta show the Panther Lake architecture can hold its own in serial tasks.

The data does not present a contest between equals. The Threadripper outscores the Intel part in every recorded benchmark, often by several hundred percent. The only question is whether the workload demands the Threadripper's massive throughput or whether the Intel part's low power envelope and integrated graphics make it the practical choice for a specific system design.

For maximum compute density, the AMD Ryzen Threadripper 9980X is the clear selection based on the recorded measurements. For mobile or low-power systems where integrated graphics and a 25 watt TDP matter more than raw multi-core output, the Intel Core Ultra X9 388H has a defined role. The database shows no scenario where the Intel part wins a performance comparison, but its specification profile addresses a different market segment entirely.