AMD Ryzen 9 9955HX vs Intel Core Ultra 7 270HX Plus Comparison

Head-to-Head Benchmarks

The recorded data splits this matchup into two distinct profiles. The AMD Ryzen 9 9955HX wins six of the fifteen head-to-head tests, while the Intel Core Ultra 7 270HX Plus takes nine. The margins, however, tell a more nuanced story than the win count alone.

AMD's largest victory comes in PassMark integer math, where it scores 212,598 against Intel's 122,449, a 73.6% advantage. This is the single biggest delta in the entire comparison and indicates a substantial throughput edge for the Zen 5 design in arithmetic-heavy workloads. Data compression also favors AMD decisively: 731,998 versus 493,179, a 48.4% lead. Extended instructions follow a similar pattern, with AMD at 57,946 and Intel at 39,283, a 47.5% gap. In multithreaded PassMark, AMD delivers 56,171 versus Intel's 48,270, a 16.4% advantage. Random string sorting goes to AMD by 29.8%, with scores of 77,890 and 60,020 respectively. The Cinebench R15 multicore test shows AMD ahead by 39.8%, scoring 5,905 against Intel's 4,224.

Intel's wins are concentrated in single-thread and specialized workloads. The most striking result is Cinebench R23 single-core, where Intel scores 5,917 against AMD's 2,174, a 63.3% deficit for AMD. The R15 single-core test shows a similar story: Intel at 596, AMD at 336, a 43.6% difference. Cinebench R23 multicore also goes to Intel, with 41,913 versus 37,159, an 11.3% margin. PassMark physics favors Intel by 29.2%, scoring 3,843 against 2,720. Prime number finding goes to Intel by 40.5%, with 482 versus 287. Floating-point math shows Intel ahead by 16.4%, at 163,567 versus 136,682. Data encryption is nearly even, with Intel winning by just 1.3%, 37,813 against 37,330. PassMark single-thread also goes to Intel, 4,764 versus 4,393, a 7.8% edge.

The overall benchmark average tells a different story than the head-to-head wins. AMD's average benchmark score is 91,199, placing it in the 96th percentile of all CPUs. Intel's average is 61,834, which puts it in the 93rd percentile. This discrepancy arises because AMD's average includes the high-scoring PassMark data compression and integer math results, which dominate the aggregate. Intel's wins are often in tests where the absolute scores are lower, so despite winning more individual comparisons, its overall average trails by a significant margin.

Context from the nearest rivals clarifies both positions. AMD's closest competitors are the Intel Xeon 654, the AMD Ryzen AI Max+ 392, the Intel Core Ultra 7 270K Plus, and the Intel Xeon 6520P. AMD sits 0.5% above the Xeon 654, 0.7% above the Ryzen AI Max+ 392, and 2.8% below both the Core Ultra 7 270K Plus and the Xeon 6520P. Intel's nearest rivals are the Intel Core i9-13900KF, i9-13900K, i9-13900T, and Xeon 636. The Core Ultra 7 270HX Plus is exactly even with the i9-13900KF, 0.1% above the i9-13900K, 0.2% above the i9-13900T, and 0.8% above the Xeon 636.

FAQ

Q: Which processor has the higher maximum boost clock?

A: The AMD Ryzen 9 9955HX boosts to 5.40 GHz, while the Intel Core Ultra 7 270HX Plus reaches 5.30 GHz. The difference is 0.10 GHz in AMD's favor.

Q: How do the core and thread counts compare between the two?

A: The Intel part has 20 cores and 20 threads, meaning no hyperthreading. The AMD part has 16 cores and 32 threads, using simultaneous multithreading. Intel has more physical cores, but AMD provides more logical threads.

Q: Which chip shows a larger lead in Cinebench R23 multicore?

A: The Intel Core Ultra 7 270HX Plus leads by 11.3% in Cinebench R23 multicore, scoring 41,913 against AMD's 37,159. This is one of Intel's clearer wins in the comparison.

Q: What is the memory bandwidth difference between the two platforms?

A: Intel lists a memory bandwidth of 102.4 GB/s, while AMD lists 89.6 GB/s. Intel has a 12.8 GB/s advantage in theoretical bandwidth.

Q: Does either processor support ECC memory?

A: The AMD Ryzen 9 9955HX supports ECC memory. The Intel Core Ultra 7 270HX Plus does not.

Q: Which chip has a higher PassMark multithread score?

A: AMD leads in PassMark multithread with 56,171 versus Intel's 48,270, a 16.4% advantage. This test reflects overall thread-level throughput, where AMD's 32 threads outperform Intel's 20.

The Verdict

The benchmark data indicates two different design priorities. The AMD Ryzen 9 9955HX delivers a dominant performance in integer math, data compression, extended instructions, and random string sorting. These workloads reward the combination of 32 threads and a large shared L3 cache. The Intel Core Ultra 7 270HX Plus counters with strong single-core results, physics simulation, prime number finding, and floating-point math, while also taking the Cinebench R23 multicore crown.

For workloads that rely on heavy integer throughput, compression, or instruction-level parallelism, the data points to AMD. The 73.6% lead in integer math and the 48.4% lead in data compression are the largest margins recorded. For tasks that favor high single-thread performance, such as lightly threaded applications or physics calculations, Intel is the clear choice. The 63.3% advantage in Cinebench R23 single-core is the most pronounced single-thread gap in the comparison.

The overall average benchmark score gives AMD the aggregate edge at 91,199 versus 61,834. The percentile rankings reflect this: AMD sits at 96, Intel at 93. However, the head-to-head win count favors Intel, 9 wins to 6. This suggests that Intel wins more individual tests, but AMD wins the tests that carry more weight in the average score calculation.

The data does not support a universal verdict. It supports a workload-specific verdict. AMD is the better choice for compression, encryption-adjacent integer tasks, and multithreaded throughput. Intel is the better choice for single-thread responsiveness, physics, and floating-point workloads. Both chips target the mobile segment and share the same 55 W TDP, so thermal envelopes are identical.

Specification Differences

The two processors differ in core configuration, clock speeds, memory bandwidth, PCIe lane count, integrated graphics, socket, and cache hierarchy. The AMD Ryzen 9 9955HX has 16 cores and 32 threads, with a base clock of 2.50 GHz and a boost clock of 5.40 GHz. The Intel Core Ultra 7 270HX Plus has 20 cores and 20 threads, with a base clock of 2.40 GHz and a boost clock of 5.30 GHz. Both share a 55 W TDP.

AMD uses the AMD Socket FL1, while Intel uses Intel BGA 2114. AMD lists 28 PCIe Gen 5 lanes (CPU only), while Intel lists 20 PCIe Gen 5 lanes (CPU only). Integrated graphics differ: AMD ships the Radeon 610M, Intel ships the Arc Xe-LPG Graphics 64EU. AMD supports ECC memory; Intel does not. Memory bandwidth also differs, with AMD at 89.6 GB/s and Intel at 102.4 GB/s. Both support DDR5 and dual-channel memory.

The cache layouts are substantially different. AMD provides 80 KB of L1 per core, 1 MB of L2 per core, and 64 MB of shared L3. Intel provides 192 KB of L1 per core, 3 MB of L2 per core, and 30 MB of shared L3. AMD's total L3 is more than double Intel's, while Intel has larger per-core L1 and L2 allocations.

Architecture Differences

The AMD Ryzen 9 9955HX is built on the Zen 5 architecture, codenamed Fire Range, and belongs to the 9000 series. It uses a 4 nm process node from TSMC. The die consists of two 70.6 mm² pieces, totaling 16,630 million transistors. The Intel Core Ultra 7 270HX Plus uses the Arrow Lake-HX Refresh codename, belongs to Core Ultra Series 2, and is built on a 3 nm process node from TSMC. Its die size is 243 mm², with 17,800 million transistors.

AMD's cache architecture favors a large shared L3 pool, which benefits workloads that reuse data across cores. Intel's cache architecture emphasizes larger per-core L1 and L2, which can speed up single-thread access patterns. The core counts diverge as well: Intel has 20 physical cores but no hyperthreading, while AMD has 16 physical cores with 32 threads via SMT. This explains why AMD wins multithreaded throughput tests despite having fewer physical cores.

Intel's integrated graphics solution, Arc Xe-LPG Graphics 64EU, is a more substantial iGPU than AMD's Radeon 610M. This difference may matter for systems that rely on the integrated graphics for display output or light GPU compute. The PCIe lane count also differs, with AMD offering 28 Gen 5 lanes against Intel's 20, which affects expandability for discrete GPUs and storage controllers.

The production status for both is Active. AMD's release date is recorded as 2025-01-05, while Intel's is 2026-03-16. Both processors are unlocked, meaning the multiplier can be adjusted. The process node advantage goes to Intel at 3 nm versus AMD's 4 nm, though AMD compensates with a lower transistor count and smaller die area. The architecture-level tradeoff is clear: AMD prioritizes thread density and large shared cache, Intel prioritizes physical core count and per-core cache resources.