AMD Ryzen 5 PRO 9645 vs Intel Core i9-14900HX Comparison

Head-to-Head Benchmarks

The recorded data presents a clear split between these two processors. The Intel Core i9-14900HX dominates the majority of the PassMark workload suite, securing 8 wins out of 11 head-to-head tests, while the AMD Ryzen 5 PRO 9645 takes the remaining 3. The margin of victory for Intel is often substantial, particularly in throughput-oriented tasks.

The largest differential appears in data encryption, where Intel scores 32,619 against AMD's 17,599, a 46% advantage. Floating point math shows a similar story, with Intel at 112,273 versus AMD's 62,720, a 44.1% lead. Integer math follows, with Intel's 157,375 outpacing AMD's 93,019 by 40.9%. These three tests highlight a consistent pattern: the Intel part leverages its higher core count to pull far ahead in parallel compute.

Random string sorting also favors Intel heavily, with a score of 60,861 compared to AMD's 38,410, a 36.9% gap. Data compression shows Intel at 539,965 against AMD's 363,736, a 32.6% difference. The multithread score, which aggregates overall parallel performance, gives Intel a 43,778 to 31,434 result, a 28.2% lead. Physics performance follows, with Intel's 2,638 versus AMD's 1,945, a 26.3% margin. Even extended instructions, the closest of Intel's wins, shows a 4.9% advantage (31,247 vs 29,705).

The AMD Ryzen 5 PRO 9645, however, has its own victories. The most notable is in single-thread performance, where it scores 4,636 compared to Intel's 4,175, an 11% lead. This is a significant result, indicating superior per-core efficiency in lightly threaded workloads. The AMD chip also wins in prime number generation, scoring 235 versus Intel's 193, a 21.8% advantage. This suggests that AMD's architecture handles certain integer-heavy, sequential tasks more effectively.

Looking at the average benchmark scores, the two are closer than the head-to-head suggests. AMD's average is 58,916, while Intel's is 56,004. This discrepancy occurs because the averages include different test suites; Intel's PassMark results are weighted toward the parallel tests where it excels, while AMD's average benefits from its strong single-thread showing and its placement among rivals like the AMD Ryzen AI 9 HX 470 (0.2% delta) and Intel Xeon w5-2545 (0.7% delta). Intel's nearest rival is the Intel Core 7 253PQE at a 0.2% delta, with the AMD Ryzen AI Max 390 at -0.5%, showing that Intel's aggregate score is competitive within its own class.

Architecture Differences

The fundamental design philosophies diverge sharply. The AMD Ryzen 5 PRO 9645 is built on a 4 nm process at TSMC, while Intel uses a 10 nm process at its own foundry. This process gap explains part of the efficiency difference, but the core configurations are the more striking contrast.

AMD fields 6 cores and 12 threads, with a base clock of 3.90 GHz and a boost of 5.40 GHz. Intel counters with 24 cores and 32 threads, using a hybrid architecture (Raptor Lake-HX) that combines performance and efficiency cores. Intel's base clock is lower at 2.20 GHz, but its boost reaches 5.80 GHz. The core count disparity (24 vs 6) is the primary driver of Intel's parallel benchmark wins.

Cache hierarchies also differ. Both have 80 KB L1 per core, but AMD's L2 is 1 MB per core while Intel's is 2 MB per core. L3 cache favors Intel in total capacity: 36 MB shared versus AMD's 32 MB shared. The die size reflects the complexity: Intel's is 257 mm², while AMD's Granite Ridge die is a much smaller 70.6 mm², with AMD listing 8,315 million transistors versus Intel's unspecified count.

Memory support separates them further. AMD supports only DDR5, dual-channel, with a listed bandwidth of 89.6 GB/s. Intel supports both DDR4 and DDR5, dual-channel, with no bandwidth figure recorded. Both support ECC memory. PCIe lanes also differ: AMD offers Gen 5 with 24 lanes (CPU only), while Intel provides Gen 5 with 16 lanes (CPU only). Integrated graphics are present on both, with AMD using Radeon Graphics and Intel using UHD Graphics 770.

The market segments tell the story: AMD is classified as Server/Workstation, while Intel is Mobile. Intel's multiplier is unlocked, allowing overclocking, whereas AMD's is locked. AMD's release date is 2025-09-15, while Intel's is 2024-01-07, making Intel the older design. Intel's socket is BGA 1964 (mounted), while AMD uses Socket AM5.

The Verdict

The data points to a clear use-case division. The Intel Core i9-14900HX is the superior choice for any workload that scales across many cores. Its wins in multithread (28.2% ahead), floating point (44.1% ahead), and integer math (40.9% ahead) make it the obvious pick for rendering, scientific simulation, or heavy data processing. The 46% lead in encryption also suggests strong performance in security-focused tasks. For users who can utilize 24 cores and 32 threads, the Intel part's aggregate performance is decisive.

The AMD Ryzen 5 PRO 9645, despite having only 6 cores, wins in single-thread performance by 11% and in prime number generation by 21.8%. This indicates that for applications that are lightly threaded, or where each thread's efficiency is paramount, AMD holds the advantage. The lower TDP (65W vs 55W, note Intel is lower but the data shows AMD's is higher) and the smaller die size (70.6 mm² vs 257 mm²) suggest that the AMD chip may be more power-efficient per unit of work, though the database does not record wattage figures. Its server/workstation classification points toward reliability in sustained workloads, but the benchmark wins do not reflect a general-purpose performance lead.

The verdict is simple: choose Intel for maximum parallel throughput, choose AMD for single-thread responsiveness and efficiency. The 11% single-thread lead is not trivial; it means snappier everyday operation and faster performance in older software that does not use many cores. However, for modern multi-threaded applications, the Intel part's 24 cores are overwhelming. The average scores (58,916 vs 56,004) suggest that in a mixed workload, the AMD part holds its own, but the head-to-head data shows Intel's raw power in the tests that matter most for heavy compute.

FAQ

Q: Which processor has a higher single-thread score?

A: The AMD Ryzen 5 PRO 9645 scores 4,636 in the PassMark single-thread test, which is 11% higher than the Intel Core i9-14900HX's 4,175.

Q: How large is the multithread performance gap?

A: The Intel Core i9-14900HX scores 43,778 in the PassMark multithread test, while the AMD Ryzen 5 PRO 9645 scores 31,434. This gives Intel a 28.2% advantage.

Q: What is the core and thread count difference?

A: The AMD Ryzen 5 PRO 9645 has 6 cores and 12 threads. The Intel Core i9-14900HX has 24 cores and 32 threads.

Q: Which processor supports more memory types?

A: The Intel Core i9-14900HX supports both DDR4 and DDR5 memory. The AMD Ryzen 5 PRO 9645 supports only DDR5.

Q: What is the difference in boost clock speeds?

A: The Intel Core i9-14900HX has a boost clock of 5.80 GHz, while the AMD Ryzen 5 PRO 9645 has a boost clock of 5.40 GHz.

Q: Which processor has a higher average benchmark score?

A: The AMD Ryzen 5 PRO 9645 has an average benchmark score of 58,916, compared to the Intel Core i9-14900HX's 56,004.

Where Each One Wins

The Intel Core i9-14900HX wins in data compression, data encryption, extended instructions, floating point math, integer math, multithread, physics, and random string sorting. These are all workloads that benefit from many cores. The 46% lead in encryption is particularly strong, suggesting use cases in database encryption or secure communications. The 44.1% lead in floating point math points to scientific computing and financial modeling. The 40.9% lead in integer math supports video encoding or image processing. For any task that can split across 24 cores, Intel is the clear winner.

The AMD Ryzen 5 PRO 9645 wins in find prime numbers and single-thread tests. The 21.8% advantage in prime number generation indicates strength in sequential, algorithmically complex integer operations. The 11% single-thread lead means that for office applications, web browsing, or legacy software that uses one core, AMD provides a faster experience. The data also shows AMD's average score is higher, indicating that in a balanced mix of workloads, the AMD chip may perform better overall despite losing most head-to-head tests. This could be due to the specific tests in the average calculation, but the result stands.

Specification Differences

The two processors differ in every major specification field. AMD has 6 cores and 12 threads, while Intel has 24 cores and 32 threads. AMD's base clock is 3.90 GHz, Intel's is 2.20 GHz; AMD's boost is 5.40 GHz, Intel's is 5.80 GHz. TDP differs: AMD is 65W, Intel is 55W. The socket is different: AMD uses Socket AM5, Intel uses BGA 1964.

Process node: AMD is 4 nm (TSMC), Intel is 10 nm (Intel). Die size: AMD is 70.6 mm², Intel is 257 mm². Transistor count is 8,315 million for AMD, unspecified for Intel. L2 cache: AMD has 1 MB per core, Intel has 2 MB per core. L3 cache: AMD has 32 MB shared, Intel has 36 MB shared. Memory support: AMD only DDR5, Intel DDR4 and DDR5. Memory bandwidth: AMD lists 89.6 GB/s, Intel lists none. PCIe lanes: AMD has 24 Gen 5 lanes, Intel has 16 Gen 5 lanes. Integrated graphics: AMD uses Radeon Graphics, Intel uses UHD Graphics 770.

Market segment: AMD is Server/Workstation, Intel is Mobile. Release date: AMD is 2025-09-15, Intel is 2024-01-07. Multiplier: AMD is locked, Intel is unlocked. Part number: AMD is 100-000001409, Intel is SRMXF. The architecture and codename also differ: AMD is Granite Ridge (Zen 5), Intel is Raptor Lake-HX (Raptor Lake).