AMD Ryzen 9 7945HX3D vs Intel Core i9-14900 Comparison

Head-to-Head Benchmarks

The head-to-head data presents a clear statistical mismatch in volume of victories, but not in every category. The AMD Ryzen 9 7945HX3D wins 12 of the 17 compared benchmarks, while the Intel Core i9-14900 takes 5. However, the magnitude and nature of those wins tell a more nuanced story than a simple count.

The most dramatic AMD victory comes in PassMark's find prime numbers test, where the Ryzen 9 7945HX3D scores 446 against Intel's 188, a staggering 137.2% delta. This is not a marginal edge; it is a near-total dominance in a workload that stresses raw integer throughput and cache residency. Similarly, in PassMark extended instructions, AMD posts 52310 versus Intel's 30624, a 70.8% lead that suggests the Zen 4 architecture handles complex instruction sequences with far greater efficiency. The physics test shows a 73.8% advantage (4321 vs 2486), and PassMark multithread reveals a 28.9% gap (57476 vs 44578). Even in data compression, where memory bandwidth often matters, AMD wins by 27.2% (699988 vs 550271).

Yet Intel is not without its counterpunches. The single-core story flips decisively. In Cinebench R23 single-core, Intel scores 2212 against AMD's 1935, a 12.5% advantage. PassMark single-thread shows Intel at 4323 versus 4050, a 6.3% lead. Geekbench single-core, however, is an AMD win at 2769 versus 2488 (11.3% delta), which complicates the narrative that Intel holds all single-thread supremacy. The Cinebench R15 single-core margin is razor-thin: Intel wins 315 to 311, just 1.3% apart. In Geekbench multicore, Intel takes a solid 9.4% victory (18495 vs 16758), which is notable because it contradicts the Cinebench multicore results where AMD wins both R15 (5600 vs 4793, 16.8% delta) and R23 (32782 vs 31070, 5.5% delta).

The floating-point math test is nearly a dead heat—AMD at 121619, Intel at 120262, a 1.1% delta. This near-parity suggests that for pure FPU throughput, the two architectures are functionally equivalent, and any differences in other tests stem from cache hierarchy, memory subsystem, or instruction handling rather than raw execution units.

Where Each One Wins

The data suggests a workload-dependent split that aligns with architectural philosophy. The AMD Ryzen 9 7945HX3D wins overwhelmingly in multi-threaded integer-heavy, cache-sensitive tasks. Its PassMark integer math score of 201217 versus Intel's 175010 (15% delta) and the prime number test's 137.2% delta point to a processor that excels when data fits in its massive L3 cache or when the scheduler can keep 16 cores fully occupied. The random string sorting test (83919 vs 61060, 37.4% delta) and data encryption (42367 vs 33540, 26.3% delta) further cement this profile—these are workloads that benefit from large, fast caches and consistent core-to-core bandwidth.

Intel's wins concentrate in short-burst single-thread and lightly-threaded scenarios. The Cinebench R23 single-core lead of 12.5% and the PassMark single-thread lead of 6.3% indicate that for applications which cannot use more than a few cores and require maximum clock speed, Intel's 5.80 GHz boost clock provides a tangible advantage. The Geekbench multicore win (9.4%) is the outlier; it suggests that Geekbench's specific mix of tests favors Intel's hybrid core arrangement, possibly due to how the scheduler distributes threads across performance and efficiency cores. For rendering workloads like Cinebench R23, AMD's 16 full Zen 4 cores outperform Intel's 24 mixed cores (8 performance + 16 efficiency, though the pack does not specify the split) by 5.5%. The AMD chip also proves superior in PassMark multithread (28.9% delta), which is a broader test of sustained all-core throughput.

Architecture Differences

The foundational difference is node and process technology. AMD builds the Ryzen 9 7945HX3D on a 5 nm process at TSMC, while Intel uses a 10 nm process at its own foundry. This node advantage is visible in the die sizes: AMD's design uses 2x 71 mm² dies (totaling 142 mm²), whereas Intel's monolithic die is 257 mm². AMD also lists 17,840 million transistors, while Intel's transistor count is not provided in the data. The smaller process node and dual-die approach likely contribute to the 7945HX3D's lower TDP of 55 watts versus Intel's 65 watts, though both are mobile-class figures in this comparison.

The cache hierarchies are radically different. AMD provides 64 KB of L1 per core, 1 MB of L2 per core, and a shared 128 MB L3 that includes a 1x 64 MB 3D V-Cache slice. This is the defining feature—the 3D V-Cache is designed to keep massive working sets on-die, which explains the extreme wins in cache-sensitive tests like prime numbers and random string sorting. Intel offers 80 KB L1 per core, 2 MB L2 per core, but only 36 MB of shared L3. Intel's larger per-core L1 and L2 are noteworthy, but the aggregate L3 deficit (36 MB vs 128 MB) is a canyon, not a gap.

Architecture families also differ: AMD uses Zen 4 (Dragon Range codename) from the 7000 series, while Intel is on Raptor Lake-R (14th generation). Both support DDR5 memory, but AMD's memory bandwidth is listed at 83.2 GB/s, while Intel's bandwidth is not provided in the pack. Intel supports both DDR4 and DDR5, whereas AMD lists only DDR5. Both support ECC memory. PCIe connectivity differs significantly: AMD provides Gen 5 with 28 lanes (CPU only), while Intel provides Gen 5 with 16 lanes (CPU only). Integrated graphics also differ—AMD has Radeon 610M, Intel has UHD Graphics 770—though the pack provides no performance data for either iGPU.

Specification Differences

The two processors diverge on nearly every core specification. AMD has 16 cores and 32 threads; Intel has 24 cores and 32 threads. This means Intel relies on a hybrid architecture to match thread count with more cores, while AMD achieves 32 threads with fewer, presumably all-full-performance cores. Base clocks differ: AMD at 2.30 GHz, Intel at 2.00 GHz. Boost clocks favor Intel at 5.80 GHz versus AMD's 5.40 GHz. TDP differs by 10 watts (AMD 55, Intel 65), which is modest but relevant for sustained workloads in constrained chassis.

Sockets are incompatible: AMD uses Socket FL1, Intel uses Socket 1700. AMD's multiplier is unlocked, while Intel's is not—a meaningful difference for overclocking, though the pack does not quantify overclocking headroom. Memory bus is dual-channel for both. Market segments differ: AMD is positioned as mobile, Intel as desktop. Release dates show AMD launched on 2023-07-26, while Intel launched on 2024-01-07. Intel has a launch MSRP of $549; AMD's launch MSRP is null in the pack. Production status is "Active" for both. The part numbers are 100-000001086 for AMD and SRN3V for Intel.

FAQ

Q: Which processor is faster in multi-core Cinebench R23?

A: The AMD Ryzen 9 7945HX3D scores 32782 versus Intel's 31070, a 5.5% delta in AMD's favor.

Q: Does the Intel Core i9-14900 win any multi-threaded tests?

A: Yes. In Geekbench multicore, Intel scores 18495 against AMD's 16758, a 9.4% delta. This is Intel's only multi-threaded win in the head-to-head set.

Q: How large is the cache difference?

A: AMD has a shared 128 MB L3 cache (including a 1x 64 MB 3D V-Cache slice), while Intel has 36 MB shared L3. AMD also provides 1 MB L2 per core versus Intel's 2 MB per core, and 64 KB L1 per core versus Intel's 80 KB.

Q: What is the largest single benchmark margin?

A: In PassMark find prime numbers, AMD scores 446 versus Intel's 188, a 137.2% delta. This is the most lopsided result in the comparison.

Q: Do both processors support ECC memory?

A: Yes, both the AMD Ryzen 9 7945HX3D and Intel Core i9-14900 list ECC memory support as true.

Q: Which processor has a higher boost clock?

A: Intel's boost clock is 5.80 GHz, while AMD's is 5.40 GHz. This aligns with Intel's wins in most single-threaded benchmarks, though AMD wins Geekbench single-core.

The Verdict

The data points to a straightforward selection criterion based on workload type. For users whose applications are heavily multi-threaded, cache-resident, or integer-bound, the AMD Ryzen 9 7945HX3D is the statistically superior choice. It wins 12 of 17 head-to-head tests, including massive margins in prime number finding (137.2%), physics (73.8%), extended instructions (70.8%), and multithread (28.9%). Its 128 MB L3 cache appears to be the decisive factor in data compression (27.2% delta) and encryption (26.3% delta). The 55-watt TDP also suggests efficiency advantages, though the pack does not provide power consumption benchmarks.

For users who prioritize single-thread responsiveness, short-burst tasks, or specific applications that mirror Geekbench's mixed workload, the Intel Core i9-14900 holds clear advantages. Its Cinebench R23 single-core lead of 12.5% and PassMark single-thread lead of 6.3% are meaningful for latency-sensitive interactions. The Geekbench multicore win (9.4%) indicates that some modern application mixes favor Intel's hybrid design. Intel's higher boost clock (5.80 GHz vs 5.40 GHz) and larger per-core L1/L2 caches provide the foundation for these wins. The Intel chip also launched at a lower TDP-adjusted profile for desktop use, though it carries a $549 launch MSRP (AMD's is not listed).

The neutral perspective from the data is that there is no universal winner. The AMD Ryzen 9 7945HX3D is the choice for compute-heavy, parallel, and cache-intensive tasks; the Intel Core i9-14900 is the choice for single-thread speed and certain mixed workloads. Both sit at the 92nd percentile of all CPUs, indicating they are elite performers in their respective domains. The decision should rest on the specific benchmark profile that matches the user's primary applications. If the workload resembles Cinebench R23 or PassMark multithread, take AMD. If it resembles Cinebench R23 single-core or Geekbench multicore, take Intel. The 137.2% delta in prime numbers is the starkest reminder that architectural choices have outsized consequences for niche workloads.