AMD Ryzen Threadripper 9970X vs Intel Core Ultra X9 378H Comparison

The AMD Ryzen Threadripper 9970X and the Intel Core Ultra X9 378H occupy distant corners of the processor market. The database records show the Threadripper 9970X as a 32-core desktop workstation part built for maximum throughput, while the Core Ultra X9 378H is a 16-core mobile chip designed for efficiency. The benchmark results show a complete sweep: the AMD processor wins all 11 recorded head-to-head tests, but the Intel part holds its own in single-thread performance and draws far less power. The data indicates these are not direct competitors, but rather two different solutions for different workloads.

The Verdict

The benchmark data presents a clear split. The AMD Ryzen Threadripper 9970X delivers overwhelming multi-threaded performance, winning every head-to-head test recorded in the database. Its average benchmark score of 279,778 places it in the 99th percentile of all CPUs, with its nearest rivals being enterprise server chips like the Intel Xeon 6780E (average score 280,438, delta -0.2%) and AMD EPYC 9565 (average score 285,471, delta -2%). This is a processor for rendering, simulation, and heavy compute workloads where core count and memory bandwidth are paramount.

The Intel Core Ultra X9 378H, with an average benchmark score of 47,468, sits in the 89th percentile, competing against desktop processors like the Intel Core i7-13700KF (average score 47,330, delta 0.3%) and AMD Ryzen 9 PRO 5945 (average score 47,527, delta -0.1%). Its performance profile suits mobile workstations and laptops where battery life and thermal limits matter more than raw core counts. The data shows the Threadripper 9970X is the choice for a fixed workstation, while the Core Ultra X9 378H is the choice for portable systems.

Architecture Differences

The two processors are built on fundamentally different designs. The AMD Ryzen Threadripper 9970X uses the Zen 5 architecture with the codename Shimada Peak, manufactured on a 4 nm process by TSMC. It contains 33,260 million transistors spread across a die size of 4x 70.6 mm². The Intel Core Ultra X9 378H uses the Panther Lake codename under the Ultra X9 generation (Panther Lake-H), built on a 3 nm process at Intel's own foundry. The database does not record transistor count or die size for the Intel part.

The cache hierarchy differs significantly. The Threadripper 9970X provides 64 KB of L1 cache per core, 1 MB of L2 cache per core, and a large 128 MB of shared L3 cache. The Core Ultra X9 378H provides a larger 192 KB of L1 cache per core and 2.5 MB of L2 cache per core, but only 18 MB of shared L3 cache. This gives the AMD part a massive total cache footprint, which directly contributes to its dominance in data-heavy workloads like compression and sorting.

Memory support also diverges. The Threadripper 9970X uses DDR5 memory over a quad-channel bus, delivering a memory bandwidth of 204.8 GB/s, and supports ECC memory. The Core Ultra X9 378H uses LPDDR5X over a dual-channel bus, delivering 153.6 GB/s, without ECC support. The AMD part also provides 80 PCIe Gen 5 lanes from the CPU, while the Intel part provides only 4 PCIe Gen 5 lanes, reflecting its mobile focus. The Intel chip integrates an Arc B390 graphics unit, while the Threadripper 9970X has no integrated graphics at all.

Head-to-Head Benchmarks

The head-to-head results show a consistent pattern of AMD dominance, but the margins vary widely by workload. The largest gap appears in passmark_integer_math, where the Threadripper 9970X scores 465,378 against 92,603, a delta of 402.6%. This test measures raw arithmetic throughput, where the AMD part's 32 cores and 64 threads crush the Intel part's 16 cores and 16 threads.

Data compression shows a 354.7% delta, with the AMD part scoring 1,757,998 versus 386,591. The extended instructions test shows a 354.5% delta (142,342 vs 31,315). Random string sorting, a cache-sensitive workload, shows a 328.8% delta (191,445 vs 44,648). These three tests highlight the benefit of the AMD part's large 128 MB L3 cache and higher memory bandwidth.

The floating-point math test shows a 170.5% delta (309,719 vs 114,500), while the multithread test shows a 180.4% delta (107,399 vs 38,298). Data encryption shows a 190.8% delta (86,765 vs 29,840). The physics test shows a 100.8% delta (6,835 vs 3,404), and the prime number test shows a 72.3% delta (615 vs 357).

The closest result is in single-thread performance. The passmark_single_thread test shows the Threadripper 9970X scoring 4,530 against the Core Ultra X9 378H's 4,453, a delta of just 1.7%. This is the only test where the Intel part comes close, indicating that for lightly threaded tasks, the architectural efficiency of the Panther Lake design nearly matches the Zen 5 design. The Intel part's higher per-core L1 cache (192 KB vs 64 KB) and per-core L2 cache (2.5 MB vs 1 MB) likely contribute to this narrow gap.

Specification Differences

The two processors differ in nearly every core specification. The AMD Ryzen Threadripper 9970X has 32 cores and 64 threads, while the Intel Core Ultra X9 378H has 16 cores and 16 threads, meaning the Intel part does not support simultaneous multithreading. The AMD part has a base clock of 4.00 GHz and a boost clock of 5.40 GHz, while the Intel part has a base clock of 2.00 GHz and a boost clock of 5.00 GHz.

The thermal design power differs enormously: the Threadripper 9970X has a TDP of 350 watts, while the Core Ultra X9 378H has a TDP of 25 watts. This 14x difference in power draw explains the form factor split between the two parts. The AMD part uses the AMD Socket sTR5 and has an unlocked multiplier, while the Intel part uses the Intel BGA 2540 socket (soldered) and has a locked multiplier.

The release dates also differ. The Threadripper 9970X launched on 2025-07-29 with a launch MSRP of $2499, while the Core Ultra X9 378H is dated 2026-04-03 with no recorded launch price. The AMD part is marked for the Desktop segment, the Intel part for Mobile. The AMD part has an active production status and part number 100-000001594, while the Intel part also has active production status but an unknown part number.

FAQ

Q: Which processor has more cores and threads?

A: The AMD Ryzen Threadripper 9970X has 32 cores and 64 threads. The Intel Core Ultra X9 378H has 16 cores and 16 threads, with no hyperthreading support.

Q: How large is the single-thread performance gap?

A: In the passmark_single_thread test, the AMD part scores 4,530 against the Intel part's 4,453, a delta of only 1.7%. This is the smallest margin in any recorded benchmark.

Q: What is the memory bandwidth difference?

A: The AMD part provides 204.8 GB/s over a quad-channel DDR5 bus. The Intel part provides 153.6 GB/s over a dual-channel LPDDR5X bus. The AMD part also supports ECC memory, while the Intel part does not.

Q: Does the Intel part have integrated graphics?

A: Yes, the Intel Core Ultra X9 378H includes an Arc B390 integrated graphics unit. The AMD Ryzen Threadripper 9970X has no integrated graphics (N/A).

Q: What is the power consumption difference?

A: The AMD part has a TDP of 350 watts, while the Intel part has a TDP of 25 watts, a 14x difference in thermal design power.

Q: Which processor has a higher average benchmark score?

A: The AMD Ryzen Threadripper 9970X has an average benchmark score of 279,778, placing it in the 99th percentile. The Intel Core Ultra X9 378H has an average score of 47,468, placing it in the 89th percentile.

Where Each One Wins

The AMD Ryzen Threadripper 9970X wins in every recorded multi-threaded and throughput-oriented test. Its largest advantages appear in integer math (402.6% ahead), data compression (354.7% ahead), and extended instructions (354.5% ahead). These workloads benefit from the combination of 32 cores, 64 threads, and the 128 MB L3 cache. The AMD part also wins in memory-heavy tasks like random string sorting (328.8% ahead) and data encryption (190.8% ahead), where the quad-channel memory bus and 204.8 GB/s bandwidth provide a decisive edge. The data shows this processor is for batch processing, scientific computing, and content creation where the 350 watt TDP is acceptable in a desk-side tower.

The Intel Core Ultra X9 378H wins in the context of portability and power efficiency, though it loses all recorded benchmark tests. Its single-thread score of 4,453 trails by only 1.7%, making it competitive for everyday responsiveness. The 25 watt TDP allows for thin, fanless or low-noise laptop designs, and the integrated Arc B390 graphics removes the need for a discrete GPU. The dual-channel memory and 4 PCIe lanes are sufficient for mobile workloads like document editing, web browsing, and light media playback. The data shows this processor is for mobile workstations where battery life and thermal constraints are the primary design drivers.

The benchmark data does not support a direct comparison of value or capability across these two products. The Threadripper 9970X is a server-class desktop part, while the Core Ultra X9 378H is a mobile part. Each wins in its own context: the AMD part for raw compute density, the Intel part for efficiency and integration. The single-thread test shows that architectural improvements in the Intel part narrow the gap when core count is not a factor, but the multi-thread tests show the AMD part's core and cache advantage is insurmountable for parallel workloads.