AMD Ryzen 9 9950X vs Intel Core Ultra X7 358H Comparison

Where Each One Wins

The benchmark data is unambiguous: the AMD Ryzen 9 9950X wins every single head-to-head comparison against the Intel Core Ultra X7 358H, 15 wins to 0. There is no workload category in the recorded measurements where the Intel part takes a lead. That does not mean the two processors occupy the same role, however. The size of the margins varies dramatically across tests, which reveals where each part is genuinely competitive or decisively outclassed.

The AMD Ryzen 9 9950X delivers its largest advantages in heavily parallel integer and extended instruction workloads. In PassMark integer math, the AMD part scores 242097 against 83147 for the Intel, a 191.2% advantage. Data compression shows a 169.6% lead (896544 versus 332508), and extended instructions show 162.4% (71564 versus 27274). These are workloads that scale with core count, thread count, and memory bandwidth, and the Ryzen 9 9950X has overwhelming superiority in each of those areas.

The Intel Core Ultra X7 358H is closest in single-threaded and lightly threaded tests. In Cinebench R23 single-core, the AMD part leads by just 5.9% (2202 versus 2080). PassMark single-thread shows a 14.9% gap (4737 versus 4124), and Cinebench R15 single-core shows 14.1% (344 versus 301.5). Prime number finding is nearly tied at 345 versus 337, a 2.4% differential. These results indicate that the Intel Panther Lake core is competitive on a per-thread basis, but the AMD Zen 5 core still holds the edge.

Architecture Differences

The two processors come from fundamentally different design philosophies and physical platforms. The AMD Ryzen 9 9950X is a 16-core, 32-thread desktop part built on the Zen 5 architecture, codenamed Granite Ridge, part of the 9000 series. It uses a 4 nm process node from TSMC and fits into the AMD Socket AM5. The Intel Core Ultra X7 358H is a 16-core, 16-thread mobile part from the Core Ultra Series 3, codenamed Panther Lake, part of the Panther Lake-H generation. It uses a 3 nm process node from Intel and uses the Intel BGA 2540 socket.

The core counts are equal at 16, but the threading models differ. The AMD part supports simultaneous multithreading, giving it 32 threads. The Intel part does not, capping it at 16 threads. This is the single largest architectural contributor to the multi-threaded benchmark gaps. The cache hierarchy also differs substantially. The AMD processor provides 80 KB of L1 per core, 1 MB of L2 per core, and 64 MB of shared L3 cache. The Intel processor provides 192 KB of L1 per core, 3 MB of L2 per core, and 18 MB of shared L3 cache.

Memory support diverges as well. The Ryzen 9 9950X uses DDR5 with dual-channel memory and a recorded bandwidth of 89.6 GB/s, and it supports ECC memory. The Core Ultra X7 358H uses LPDDR5X with dual-channel memory and a higher recorded bandwidth of 153.6 GB/s, but it does not support ECC. The Intel part also carries the Arc B390 integrated graphics, while the AMD part uses Radeon Graphics.

Head-to-Head Benchmarks

The Cinebench suite shows the full range of the performance spread. In Cinebench R23 multi-core, the Ryzen 9 9950X scores 40924 against 18747 for the Intel part, a 118.3% lead. Cinebench R15 multi-core shows 6335 versus 3027, a 109.3% lead. These results confirm that the AMD processor's 32 threads and 64 MB L3 cache translate directly into massive rendering and compute throughput advantages.

Single-core results are much tighter but still favor AMD. Cinebench R23 single-core scores 2202 versus 2080, a 5.9% lead. Cinebench R15 single-core scores 344 versus 301.5, a 14.1% lead. The PassMark single-thread score is 4737 versus 4124, a 14.9% lead. The data indicates that the Intel core is a capable single-thread performer, but it cannot match the Zen 5 core's top-end clock of 5.70 GHz versus 4.80 GHz.

The PassMark suite reveals where the Intel part falls furthest behind. Integer math shows 242097 versus 83147, a 191.2% deficit. Data compression shows 896544 versus 332508, a 169.6% deficit. Extended instructions show 71564 versus 27274, a 162.4% deficit. Random string sorting shows 94368 versus 40357, a 133.8% deficit. Floating point math shows 159063 versus 103842, a 53.2% lead for AMD. Data encryption shows 44366 versus 26046, a 70.3% lead. PassMark multi-thread shows 66030 versus 33802, a 95.3% lead.

The physics test is the closest PassMark result outside of prime numbers. The AMD part scores 3279 versus 3021, an 8.5% lead. Prime number finding is the narrowest overall margin, with 345 versus 337, a 2.4% lead. These two results, along with the Cinebench R23 single-core test, define the upper bound of Intel's competitiveness.

The Verdict

The data supports a clear conclusion: the AMD Ryzen 9 9950X is the superior processor in every measured benchmark. It holds a 94th percentile ranking among all CPUs, while the Intel Core Ultra X7 358H sits at the 87th percentile. The average benchmark score for the AMD part is 74640, versus 40967 for the Intel part.

The Ryzen 9 9950X is the choice for any workload that benefits from thread count, large cache, or raw compute throughput. Its 32 threads, 64 MB L3 cache, and 170 TDP envelope deliver results that the Intel mobile part cannot approach. The nearest rivals to the AMD part in the database are the AMD Ryzen 7 PRO 9745 (delta -0.2%), AMD Ryzen AI 9 HX PRO 475 (delta 0.2%), AMD EPYC 4545P (delta -1%), and Intel Core Ultra 9 285 (delta -1.1%). All of these are within 1.1% of the Ryzen 9 9950X, indicating it sits at the top of a tight performance cluster.

The Intel Core Ultra X7 358H is a mobile processor with a 25 TDP, and its benchmark results place it in a different performance class. Its nearest rivals are the AMD Ryzen AI 5 PRO 440 (delta -0.6%), Intel Core Ultra 7 356H (delta -0.6%), AMD Ryzen AI 5 PRO 435G (delta 0.6%), and Intel Core Ultra 7 366H (delta -0.7%). The Intel part is competitive within its own mobile segment, but it cannot bridge the gap to the desktop-class AMD part.

The only context where the Intel part has a measurable advantage is power efficiency and memory bandwidth. The Intel processor records 153.6 GB/s of memory bandwidth versus 89.6 GB/s for the AMD part, and it operates at 25 TDP versus 170 TDP. These are real differences, but they do not appear in the benchmark scores as performance wins.

FAQ

Q: Which processor has more threads?

A: The AMD Ryzen 9 9950X has 32 threads from 16 cores. The Intel Core Ultra X7 358H has 16 threads from 16 cores.

Q: What is the single-thread performance difference?

A: The AMD part leads in PassMark single-thread with 4737 versus 4124, a 14.9% advantage. In Cinebench R23 single-core, the lead is 5.9% (2202 versus 2080).

Q: How large is the multi-core gap?

A: In Cinebench R23 multi-core, the AMD part scores 40924 versus 18747, a 118.3% lead. In PassMark multi-thread, the AMD part scores 66030 versus 33802, a 95.3% lead.

Q: Do both processors support ECC memory?

A: No. The AMD Ryzen 9 9950X supports ECC memory. The Intel Core Ultra X7 358H does not.

Q: What are the cache configurations?

A: The AMD part has 80 KB L1 per core, 1 MB L2 per core, and 64 MB shared L3. The Intel part has 192 KB L1 per core, 3 MB L2 per core, and 18 MB shared L3.

Q: Which processor has a higher boost clock?

A: The AMD Ryzen 9 9950X boosts to 5.70 GHz. The Intel Core Ultra X7 358H boosts to 4.80 GHz.

Specification Differences

The two processors differ in nearly every major specification category.

The AMD Ryzen 9 9950X uses 16 cores and 32 threads, with a base clock of 4.30 GHz and a boost clock of 5.70 GHz. The Intel Core Ultra X7 358H uses 16 cores and 16 threads, with a base clock of 1.90 GHz and a boost clock of 4.80 GHz.

The AMD part is built on Zen 5 architecture (Granite Ridge) using a 4 nm TSMC process, with 16,630 million transistors and a die size of 2x 70.6 mm². The Intel part uses Panther Lake architecture on a 3 nm Intel process; its transistor count and die size are not recorded in the database.

The cache hierarchy differs: the AMD part has 80 KB L1 per core, 1 MB L2 per core, and 64 MB L3. The Intel part has 192 KB L1 per core, 3 MB L2 per core, and 18 MB L3.

Memory support differs: the AMD part uses DDR5 with dual-channel memory, 89.6 GB/s bandwidth, and ECC support. The Intel part uses LPDDR5X with dual-channel memory, 153.6 GB/s bandwidth, and no ECC.

The AMD part has 24 PCIe Gen 5 lanes (CPU only) and uses the AMD Socket AM5. The Intel part has 4 PCIe Gen 5 lanes (CPU only) and uses Intel BGA 2540.

The AMD part has an unlocked multiplier and a launch MSRP of $649, and it was released on 2024-08-14. The Intel part has a locked multiplier, no recorded launch MSRP, and was released on 2026-01-04. The AMD part carries part number 100-000001277; the Intel part carries SA4RAQ9ET.