AMD Ryzen 7 8745HX vs NVIDIA RTX Spark (MediaTek AHJ11488B) Comparison

Where Each One Wins

The benchmark data splits cleanly between these two mobile processors, but only one of them has recorded measurements in the database. The AMD Ryzen 7 8745HX carries 11 benchmark entries across PassMark workloads, while the NVIDIA RTX Spark (MediaTek AHJ11488B) currently has zero recorded benchmark scores. This means the use-case analysis for the RTX Spark must rely on its architectural specifications rather than measured performance.

The AMD Ryzen 7 8745HX shows its strongest results in integer-heavy and compression workloads. Its PassMark integer math score of 100,328 and data compression score of 363,759 indicate strong performance for database operations, archive handling, and general productivity tasks. The floating-point math score of 61,972 and extended instructions score of 27,638 suggest capable number-crunching for scientific and engineering workloads. The multithread score of 31,517 places it among the top 8% of all CPUs in the database, with a percentile ranking of 92.

The single-thread score of 3,879 reflects strong per-core performance, which matters for lightly threaded applications like legacy software, web browsing, and office suites. The physics score of 1,681 and prime number finding score of 159 round out the measured workloads, with random string sorting at 44,494 showing solid memory-bound sorting capability.

The RTX Spark presents a different profile entirely. With 20 cores and 20 threads, it has no simultaneous multithreading, meaning each core handles one thread. The boost clock reaches 4.00 GHz, which is below the Ryzen 7 8745HX's 5.10 GHz boost. The RTX Spark's integrated graphics are labeled GB20B "Blackwell," and its memory bandwidth of 273.1 GB/s is substantially higher than the Ryzen's 83.2 GB/s. This bandwidth advantage, combined with quad-channel LPDDR5X memory support, suggests strong performance for memory-bandwidth-sensitive tasks, though no benchmark data confirms this.

The core count difference matters for parallel workloads. The RTX Spark has 20 physical cores versus the Ryzen's 8 cores and 16 threads. In theory, the higher physical core count could benefit heavily parallel workloads that scale linearly with core count, but the lack of SMT and lower clock speeds could offset that advantage.

Architecture Differences

The two processors come from different design philosophies. The AMD Ryzen 7 8745HX uses Zen 4 architecture on TSMC's 5 nm process, part of the Dragon Range codename family in the 8000 series. It packs 6,570 million transistors into a 71 mm² die. The RTX Spark uses the N1X codename with the Spark (GB10) generation label, built on TSMC's 3 nm process with a 208 mm² die size. The process node difference gives the RTX Spark a manufacturing advantage in density and power efficiency, though transistor count data is not recorded for it.

Cache hierarchies differ significantly. The Ryzen 7 8745HX has 64 KB of L1 cache per core, 1 MB of L2 per core, and 32 MB of shared L3 cache. The RTX Spark has 128 KB of L1 per core, 2 MB of L2 per core, and only 8 MB of shared L3. The per-core L1 and L2 capacities are doubled on the RTX Spark, but the shared L3 is four times smaller. For workloads that rely on large shared caches, the Ryzen 7 8745HX holds the advantage. For per-core cache-locality patterns, the RTX Spark's larger private caches could help.

Memory subsystems diverge substantially. The Ryzen 7 8745HX supports dual-channel DDR5 with 83.2 GB/s bandwidth. The RTX Spark supports quad-channel LPDDR5X with 273.1 GB/s bandwidth, a 3.3x higher figure. The RTX Spark's memory bus width and bandwidth indicate a design aimed at feeding many cores and integrated graphics simultaneously. The Ryzen's narrower memory path may bottleneck some memory-heavy operations, though its larger L3 cache partially compensates.

Power envelopes differ as well. The Ryzen 7 8745HX has a 55 W TDP, while the RTX Spark has a 38 W TDP. The lower TDP of the RTX Spark, combined with the 3 nm process, suggests better power efficiency per core, though the Ryzen's higher TDP allows higher sustained clocks. The Ryzen's boost clock reaches 5.10 GHz versus 4.00 GHz for the RTX Spark, a 1.10 GHz difference that favors the AMD part in single-threaded responsiveness.

The Ryzen 7 8745HX uses AMD Socket FL1, has an unlocked multiplier, and supports PCIe Gen 5 with 28 lanes from the CPU. The RTX Spark has no socket listed and a locked multiplier. Its PCIe support is marked N/A, indicating an integrated system-on-chip design rather than a modular socketed processor. The Ryzen's unlocked multiplier allows overclocking on supported platforms, while the RTX Spark is fixed.

Integrated graphics also differ. The Ryzen 7 8745HX includes Radeon 610M graphics. The RTX Spark includes GB20B "Blackwell" graphics, which by name suggests a newer GPU architecture. Neither processor supports ECC memory.

The Ryzen 7 8745HX is marked as Active in production and was released on 2025-04-22. The RTX Spark is marked as unreleased with a 2025-12-31 release date. The average benchmark score for the Ryzen is 60,104, while the RTX Spark has an average score of 0 due to no recorded benchmarks.

The Verdict

The data supports a clear choice for users who need measured, verified performance today: the AMD Ryzen 7 8745HX. It has 11 recorded benchmark scores, a 92nd percentile ranking among all CPUs, and an average score of 60,104. Its nearest rivals in the database include the AMD Ryzen 9 7945HX at 60,099 (0% delta), the Intel Core i9-14900F at 60,008 (0.2% faster), and the AMD Ryzen 9 7945HX3D at 59,641 (0.8% slower). The Ryzen 7 8745HX sits within 1% of these high-end desktop and mobile processors, an indication that it performs at flagship-adjacent levels despite its mobile positioning.

The RTX Spark, with no recorded benchmark scores and a 50th percentile placeholder ranking, cannot be compared on measured performance. Its specifications suggest a different target: 20 physical cores, 273.1 GB/s memory bandwidth, and 3 nm manufacturing. These features point toward workloads that demand memory bandwidth and raw core count, such as AI inference, media processing, or data streaming. But without benchmark data, those advantages remain speculative.

For users choosing between these two right now, the Ryzen 7 8745HX is the only option with verified performance data. The RTX Spark may offer architectural advantages in specific scenarios, but the database contains no measurements to confirm them. The Ryzen's 5.10 GHz boost clock, 32 MB L3 cache, and 92nd percentile ranking make it the safer choice for general-purpose mobile computing.

The RTX Spark becomes interesting only in the context of its unreleased status. Once benchmark data arrives, its high memory bandwidth and 20-core configuration could make it competitive in bandwidth-sensitive workloads. Until then, the Ryzen 7 8745HX stands as the measured performer.

FAQ

Q: How does the AMD Ryzen 7 8745HX compare to its nearest rivals in average score?

A: The Ryzen 7 8745HX has an average benchmark score of 60,104. The AMD Ryzen 9 7945HX scores 60,099 (0% delta), the Intel Core i9-14900F scores 60,008 (0.2% higher), and the AMD Ryzen 9 7945HX3D scores 59,641 (0.8% lower). The Ryzen 7 8745HX is effectively tied with these processors.

Q: What is the RTX Spark's benchmark performance?

A: The RTX Spark has zero recorded benchmark scores in the database. Its average benchmark score is listed as 0, and its percentile ranking is 50. No PassMark results exist for any workload.

Q: Which processor has more cores and threads?

A: The RTX Spark has 20 cores and 20 threads. The AMD Ryzen 7 8745HX has 8 cores and 16 threads. The RTX Spark has 12 more physical cores but 4 more threads total, since it lacks simultaneous multithreading.

Q: How do the memory bandwidth figures compare?

A: The RTX Spark supports quad-channel LPDDR5X with 273.1 GB/s bandwidth. The AMD Ryzen 7 8745HX supports dual-channel DDR5 with 83.2 GB/s bandwidth. The RTX Spark's bandwidth is 3.3 times higher.

Q: What are the release statuses of these processors?

A: The AMD Ryzen 7 8745HX is Active in production with a release date of 2025-04-22. The RTX Spark is marked as unreleased with a release date of 2025-12-31.

Q: Which processor has a higher boost clock?

A: The AMD Ryzen 7 8745HX boosts to 5.10 GHz. The RTX Spark boosts to 4.00 GHz. The Ryzen's boost clock is 1.10 GHz higher.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries between the AMD Ryzen 7 8745HX and the NVIDIA RTX Spark. The wins counter shows 0 for both processors. This absence of comparative data means no direct score-to-score comparison is possible.

Instead, the available data allows an indirect comparison based on the Ryzen 7 8745HX's absolute scores and the RTX Spark's architectural specifications. The Ryzen 7 8745HX's largest measured wins are in data compression at 363,759 and integer math at 100,328. These scores demonstrate strong throughput in tasks that benefit from the 32 MB shared L3 cache and 5.10 GHz boost clock.

The Ryzen's floating-point math score of 61,972 and extended instructions score of 27,638 indicate robust SIMD and vector processing capability. The multithread score of 31,517, combined with the 92nd percentile ranking, places it among the fastest mobile processors in the database.

The single-thread score of 3,879 is the figure most directly tied to clock speed and per-core efficiency. With a 5.10 GHz boost clock, the Ryzen 7 8745HX excels at workloads that cannot use many cores. The physics score of 1,681 and prime number score of 159 complete the measured picture, showing modest absolute results in these specific tests but consistent with the processor's overall positioning.

The RTX Spark's only comparable figures are its specifications. Its 20-core configuration and 273.1 GB/s memory bandwidth are the standout numbers. The 3 nm process node and 208 mm² die size indicate a modern, dense design. The 38 W TDP is 17 W lower than the Ryzen's 55 W TDP, suggesting better power efficiency.

The Ryzen 7 8745HX's nearest rival data provides additional context. Its average score of 60,104 is 0% different from the AMD Ryzen 9 7945HX, 0.2% lower than the Intel Core i9-14900F, and 0.8% higher than the AMD Ryzen 9 7945HX3D. These deltas show the Ryzen 7 8745HX operating in flagship territory, despite being a lower-tier part in AMD's 8000 series. The Intel Xeon Gold 6338T scores 60,572, which is 0.8% higher than the Ryzen 7 8745HX, indicating server-class performance parity.

The data confirms that the Ryzen 7 8745HX delivers performance near the top of the database's CPU rankings. The RTX Spark remains an unmeasured quantity. Its specifications could make it competitive in bandwidth-bound and highly parallel workloads, but the absence of recorded benchmarks means any performance claim would be speculation. The database currently supports only one conclusion: the AMD Ryzen 7 8745HX is the verified performer, and the RTX Spark awaits measurement.