AMD Ryzen 9 5900XT vs Intel Core Ultra X9 378H Comparison

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen 9 5900XT records an average benchmark score of 50718, while the Intel Core Ultra X9 378H records 47468. The AMD part sits at the 90th percentile of all CPUs, compared to the 89th percentile for the Intel part.

Q: How do the two processors compare in Cinebench R23 multi-core performance?

A: The AMD Ryzen 9 5900XT scores 37373 in Cinebench R23 multi-core, which is 14.8% ahead of the Intel Core Ultra X9 378H's 32553. The AMD part wins all six Cinebench tests in the database.

Q: In which benchmark does the Intel processor deliver its largest victory?

A: The Intel Core Ultra X9 378H wins PassMark physics by a margin of 49.6%, scoring 3404 against the AMD part's 1715. This is the largest percentage gap in favor of the Intel chip.

Q: Which processor supports ECC memory?

A: The AMD Ryzen 9 5900XT supports ECC memory, while the Intel Core Ultra X9 378H does not. Both processors use dual-channel memory buses, but the AMD part supports DDR4 while the Intel part supports LPDDR5X.

Q: What is the thread count difference between the two processors?

A: The AMD Ryzen 9 5900XT has 32 threads from 16 cores, while the Intel Core Ultra X9 378H has 16 threads from 16 cores. The AMD part has double the thread count.

Q: Which processor has the higher boost clock?

A: The Intel Core Ultra X9 378H has a boost clock of 5.00 GHz, which is higher than the AMD Ryzen 9 5900XT's 4.80 GHz. The AMD part has a higher base clock at 3.30 GHz versus 2.00 GHz for the Intel part.

Architecture Differences

The AMD Ryzen 9 5900XT is a desktop processor built on the Zen 3 architecture with the Vermeer codename, produced on a 7 nm process at TSMC using 8,300 million transistors across a die size of 2x 74 mm². It belongs to the 5000 series and the Ryzen 9 generation. The Intel Core Ultra X9 378H is a mobile processor with the Panther Lake codename, belonging to the Core Ultra Series 3 and the Ultra X9 (Panther Lake-H) generation, fabricated on a 3 nm process at Intel. The database lists no transistor count or die size for the Intel part.

The cache layouts differ substantially. The AMD processor provides 64 KB of L1 cache per core, 512 KB of L2 cache per core, and 64 MB of L3 cache. The Intel processor provides 192 KB of L1 cache per core, 2.5 MB of L2 cache per core, and 18 MB of shared L3 cache. The AMD part has no 3D V-Cache, and neither processor lists a 3D V-Cache configuration.

The AMD part uses AMD Socket AM4 and supports DDR4 memory with a memory bandwidth of 51.2 GB/s. The Intel part uses Intel BGA 2540 and supports LPDDR5X memory with a memory bandwidth of 153.6 GB/s. The Intel part offers triple the memory bandwidth of the AMD part, despite both using dual-channel buses.

The AMD processor includes ECC memory support, while the Intel processor does not. PCIe capabilities differ: the AMD part provides Gen 4 with 20 lanes (CPU only), while the Intel part provides Gen 5 with 4 lanes (CPU only). The Intel part includes integrated graphics in the form of Arc B390, while the AMD part has no integrated graphics.

The AMD processor has an unlocked multiplier and a known part number (100-000001581). The Intel processor has a locked multiplier and an unknown part number. The AMD part launched on 2024-07-30 with a launch MSRP of $349. The Intel part has no launch MSRP recorded and launched on 2026-04-03. The AMD processor has a TDP of 105, while the Intel processor has a TDP of 25, reflecting their desktop versus mobile positioning.

Head-to-Head Benchmarks

The AMD Ryzen 9 5900XT dominates the Cinebench suite with consistent 14.8% margins. In Cinebench R15 multi-core, the AMD part scores 3767 against 3281 for the Intel part. In Cinebench R15 single-core, the AMD part scores 531 against 462. Cinebench R20 multi-core shows 15696 versus 13672, and Cinebench R20 single-core shows 2215 versus 1929. Cinebench R23 multi-core shows 37373 versus 32553, and Cinebench R23 single-core shows 5276 versus 4595. Across all six Cinebench tests, the AMD processor wins by exactly 14.8% or 14.9%, indicating a consistent per-thread and multi-thread advantage in this rendering workload.

The PassMark suite reveals a more mixed picture. The AMD processor wins PassMark multithread with 43810 against 38298, a 14.4% margin. The largest AMD win comes in PassMark integer math, where the AMD part scores 177566 against 92603, a 91.7% advantage. This is the single largest delta in the entire head-to-head set. PassMark data compression also favors the AMD part heavily: 597862 versus 386591, a 54.6% margin. PassMark random string sorting goes to AMD at 62537 versus 44648, a 40.1% margin. PassMark data encryption favors AMD at 37814 versus 29840, a 26.7% margin. PassMark extended instructions favors AMD at 39141 versus 31315, a 25% margin.

The Intel Core Ultra X9 378H secures its wins in specific PassMark workloads. PassMark single-thread goes to Intel at 4453 versus 3474, a 22% margin. This is notable because the AMD part wins all Cinebench single-core tests, yet the Intel part wins the PassMark single-thread test. PassMark physics favors Intel at 3404 versus 1715, a 49.6% margin. PassMark floating point math favors Intel at 114500 versus 99398, a 13.2% margin. PassMark find prime numbers favors Intel at 357 versus 205, a 42.6% margin.

The overall win tally in the head-to-head comparison is 12 wins for the AMD Ryzen 9 5900XT and 5 wins for the Intel Core Ultra X9 378H. The AMD processor's multithread advantage is broad but not universal; the Intel processor counters with efficiency in physics, prime number computation, and floating point math.

Specification Differences

The two processors differ in nearly every specification category. The AMD Ryzen 9 5900XT has 16 cores and 32 threads, while the Intel Core Ultra X9 378H has 16 cores and 16 threads. Base clocks are 3.30 GHz for AMD and 2.00 GHz for Intel. Boost clocks are 4.80 GHz for AMD and 5.00 GHz for Intel. TDP is 105 for AMD and 25 for Intel.

The AMD part uses AMD Socket AM4; the Intel part uses Intel BGA 2540. The AMD architecture is Zen 3 with the Vermeer codename; the Intel architecture is not listed, but the codename is Panther Lake. The AMD generation is Ryzen 9 (Zen 3 (Vermeer)); the Intel generation is Ultra X9 (Panther Lake-H). The process node is 7 nm at TSMC for AMD and 3 nm at Intel for the Intel part. The AMD part has 8,300 million transistors and a die size of 2x 74 mm²; the Intel part has no listed transistor count or die size.

Cache structures differ: L1 is 64 KB per core for AMD versus 192 KB per core for Intel. L2 is 512 KB per core for AMD versus 2.5 MB per core for Intel. L3 is 64 MB for AMD versus 18 MB shared for Intel. Memory support is DDR4 for AMD versus LPDDR5X for Intel. Memory bandwidth is 51.2 GB/s for AMD versus 153.6 GB/s for Intel. ECC memory is supported by AMD, not by Intel. PCIe is Gen 4 with 20 lanes for AMD versus Gen 5 with 4 lanes for Intel. Integrated graphics is N/A for AMD versus Arc B390 for Intel.

Market segment is Desktop for AMD and Mobile for Intel. Both are Active in production status. The AMD release date is 2024-07-30; the Intel release date is 2026-04-03. The AMD launch MSRP is $349; the Intel launch MSRP is not listed. The AMD multiplier is unlocked; the Intel multiplier is locked. The AMD part number is 100-000001581; the Intel part number is unknown.

The Verdict

The recorded data shows a desktop processor with a substantial multithread lead facing a mobile processor with specific single-thread and efficiency strengths. The AMD Ryzen 9 5900XT wins 12 of the 17 head-to-head benchmarks and holds a 6.8% average score advantage (50718 versus 47468). Its 91.7% lead in integer math and 54.6% lead in data compression indicate a strong fit for integer-heavy, compression-heavy, and general multithread workloads. The Cinebench results, all favoring AMD by roughly 14.8%, confirm consistent rendering performance per core.

The Intel Core Ultra X9 378H wins the PassMark single-thread test by 22% and PassMark physics by 49.6%, despite losing every Cinebench single-core test. This suggests the Intel part has a different performance profile depending on the workload type. Its 153.6 GB/s memory bandwidth, triple the AMD part's 51.2 GB/s, supports its floating point and physics results. The Intel part also integrates Arc B390 graphics, which the AMD part lacks entirely.

The AMD processor is the choice for users who need maximum multithread throughput, high thread counts, ECC memory support, and a desktop socket with an unlocked multiplier. Its 64 MB L3 cache and 32 threads give it a clear advantage in heavily threaded tasks. The Intel processor is the choice for mobile systems where the 25 TDP, integrated graphics, and higher memory bandwidth matter more than raw multithread performance. The Intel part also delivers better PassMark single-thread results and physics performance, despite its locked multiplier and lack of ECC support.

The data does not support a single universal winner. The AMD part wins the majority of benchmarks and the higher average score, but the Intel part wins in specific workloads and offers a fundamentally different feature set. The selection depends on whether the workload favors the AMD part's thread scaling and cache capacity or the Intel part's memory bandwidth, integrated graphics, and single-thread PassMark results.