AMD Ryzen 7 8745HX vs AMD Ryzen AI 5 430 Comparison

The Verdict

The benchmark data separates these two mobile processors into clearly distinct performance tiers. The AMD Ryzen 7 8745HX wins every single head-to-head benchmark in the database, 11 out of 11, with no wins for the AMD Ryzen AI 5 430. The 8745HX delivers a 128.9% advantage in data compression, a 187.7% lead in data encryption, and a 136.6% margin in multithread performance. For workloads that scale with core count and raw compute throughput, the 8745HX is the decisive choice.

The Ryzen AI 5 430, however, is not without its own strengths. Its single-thread score of 3683 trails the 8745HX by only 5.3%, a narrow gap that indicates the newer architecture closes much of the per-core performance distance. The 430 also operates at a 28 W TDP compared to 55 W for the 8745HX, and it supports ECC memory while the 8745HX does not. For users prioritizing efficiency, a smaller physical footprint, or error-correcting memory, the Ryzen AI 5 430 offers a compelling alternative despite its lower raw scores.

The data suggests a straightforward split: the Ryzen 7 8745HX is for demanding multi-threaded tasks, while the Ryzen AI 5 430 is for power-conscious systems where single-core responsiveness and memory safety matter more than peak throughput.

Architecture Differences

The two processors come from different design generations. The Ryzen 7 8745HX uses the Zen 4 architecture on TSMC's 5 nm process node, with the Dragon Range codename and a die size of 71 mm² containing 6,570 million transistors. It features 8 cores and 16 threads, with a base clock of 3.60 GHz and a boost clock of 5.10 GHz. Its cache layout includes 64 KB of L1 per core, 1 MB of L2 per core, and 32 MB of shared L3 cache.

The Ryzen AI 5 430 belongs to the Ryzen AI 400 series, using a hybrid Zen 5 / Zen 5c architecture on TSMC's 4 nm node, with the Gorgon Point codename. It has 4 cores and 8 threads, with a base clock of 2.00 GHz and a boost clock of 4.50 GHz. Its cache structure differs notably: 80 KB of L1 per core, 1 MB of L2 per core, but only 4 MB of L3 cache. The smaller L3 is a significant architectural divergence, likely reflecting the lower power envelope and different design goals.

The 8745HX supports DDR5 memory only, with dual-channel configuration and a memory bandwidth of 83.2 GB/s. The 430 supports both DDR5 and LPDDR5X, also dual-channel, with a higher memory bandwidth of 89.6 GB/s. The 430 also includes ECC memory support, a feature absent on the 8745HX. PCIe connectivity differs as well: the 8745HX offers Gen 5 with 28 CPU lanes, while the 430 provides Gen 4 with 14 CPU lanes. The integrated graphics also diverge, with the 8745HX using Radeon 610M and the 430 using Radeon 840M.

The sockets are incompatible: AMD Socket FL1 for the 8745HX, AMD Socket FP8 for the 430. The 8745HX has an unlocked multiplier, while the 430 does not. The release dates also differ, with the 8745HX launching in April 2025 and the 430 in January 2026.

Where Each One Wins

The Ryzen 7 8745HX dominates in every measured category, but the margin varies by workload. The largest advantages appear in compute-heavy, multi-threaded operations. In prime number finding, the 8745HX scores 159 versus 44, a 261.4% lead. Integer math shows a 153.1% advantage (100328 versus 39637), and data encryption shows a 187.7% gap (21840 versus 7591). Random string sorting favors the 8745HX by 167.7% (44494 versus 16623). These results indicate the 8745HX is significantly stronger in encryption workloads, mathematical computation, and data sorting tasks.

The 8745HX also wins in floating-point math by 127.9% (61972 versus 27193) and extended instructions by 141.3% (27638 versus 11455). The multithread benchmark score of 31517 versus 13320, a 136.6% difference, confirms the 8745HX's superiority in fully threaded applications. The physics test shows a 131.5% advantage (1681 versus 726), suggesting better performance in simulation-style workloads.

The Ryzen AI 5 430's closest contest is in single-thread performance. The 8745HX scores 3879 versus 3683, just a 5.3% difference. This narrow margin, combined with the 430's lower TDP of 28 W versus 55 W, suggests the 430 could be the more efficient option for lightly threaded applications where battery life or thermal constraints are primary. The 430 also has a higher memory bandwidth of 89.6 GB/s, which could benefit memory-bound tasks despite its lower compute scores.

The database places the 8745HX at the 92nd percentile among all CPUs, while the 430 sits at the 73rd percentile. The 8745HX's average benchmark score is 60104, compared to 19617 for the 430, a roughly threefold difference in overall performance.

FAQ

Q: Which processor has better multi-core performance?

A: The Ryzen 7 8745HX. Its PassMark multithread score is 31517 versus 13320 for the Ryzen AI 5 430, a 136.6% advantage. All multi-threaded benchmarks in the database favor the 8745HX.

Q: How close are the two in single-core performance?

A: Very close. The 8745HX scores 3879 in the single-thread benchmark, while the 430 scores 3683, a difference of only 5.3%. This is the smallest performance gap between the two processors in any test.

Q: Does the Ryzen AI 5 430 support ECC memory?

A: Yes. The 430 has ECC memory support enabled, while the 8745HX does not support ECC memory.

Q: Which processor uses a newer manufacturing process?

A: The Ryzen AI 5 430 uses TSMC's 4 nm process node, while the Ryzen 7 8745HX uses TSMC's 5 nm node. The 430 also uses a newer Zen 5 / Zen 5c architecture compared to the 8745HX's Zen 4.

Q: What is the memory bandwidth difference?

A: The Ryzen AI 5 430 has a higher memory bandwidth at 89.6 GB/s, compared to 83.2 GB/s for the 8745HX. The 430 also supports LPDDR5X in addition to DDR5, while the 8745HX supports only DDR5.

Q: Which processor has more cores and threads?

A: The Ryzen 7 8745HX has 8 cores and 16 threads, while the Ryzen AI 5 430 has 4 cores and 8 threads.

Head-to-Head Benchmarks

The most decisive victory for the Ryzen 7 8745HX comes in the prime number finding test. The 8745HX scores 159, while the Ryzen AI 5 430 manages only 44, resulting in a 261.4% advantage. This test is particularly sensitive to integer arithmetic and branch prediction efficiency, and the gap suggests the 8745HX's higher boost clock of 5.10 GHz, combined with its larger 32 MB L3 cache, provides a substantial edge in this workload.

Data encryption shows a similarly lopsided result. The 8745HX scores 21840, which is 187.7% higher than the 430's 7591. Encryption workloads often benefit from parallel execution and large caches, both of which favor the 8745HX's 8-core design and 32 MB of shared L3. The 430's 4 MB L3 cache likely becomes a bottleneck in this scenario.

Random string sorting produces a 167.7% win for the 8745HX, with scores of 44494 versus 16623. This test involves memory allocation and pointer chasing, where the 8745HX's larger cache hierarchy helps maintain higher throughput. Integer math follows at 153.1%, with the 8745HX scoring 100328 against 39637.

The extended instructions benchmark shows a 141.3% lead for the 8745HX (27638 versus 11455), indicating better performance on SIMD and specialized instruction sets. Floating-point math delivers a 127.9% advantage (61972 versus 27193), and the multithread test shows a 136.6% gap (31517 versus 13320). The physics benchmark, which simulates rigid body dynamics, favors the 8745HX by 131.5% (1681 versus 726).

Data compression results in a 128.9% win for the 8745HX, with scores of 363759 versus 158912. This test heavily utilizes multi-threading and memory bandwidth, where the 8745HX's 16 threads and 83.2 GB/s bandwidth perform strongly.

The single-thread benchmark is the only test where the two processors are close. The 8745HX scores 3879, just 5.3% ahead of the 430's 3683. This small delta suggests that for single-threaded applications, the newer Zen 5 architecture in the 430 nearly matches the older Zen 4 design, despite the 430's lower boost clock of 4.50 GHz versus 5.10 GHz.

Specification Differences

The two processors differ in several key specification fields. The Ryzen 7 8745HX has 8 cores and 16 threads, while the Ryzen AI 5 430 has 4 cores and 8 threads. Base clocks are 3.60 GHz for the 8745HX and 2.00 GHz for the 430. Boost clocks are 5.10 GHz and 4.50 GHz respectively. TDP ratings are 55 W for the 8745HX and 28 W for the 430.

The architecture differs: Zen 4 (Dragon Range) for the 8745HX, Zen 5 / Zen 5c (Gorgon Point) for the 430. Process nodes are 5 nm for the 8745HX and 4 nm for the 430, both fabricated by TSMC. The 8745HX uses AMD Socket FL1, while the 430 uses AMD Socket FP8.

Cache configurations diverge significantly. The 8745HX has 64 KB of L1 per core, 1 MB of L2 per core, and 32 MB of shared L3. The 430 has 80 KB of L1 per core, 1 MB of L2 per core, and only 4 MB of L3 cache. The 8745HX has a die size of 71 mm² with 6,570 million transistors, while the 430's die size and transistor count are not recorded.

Memory support differs: the 8745HX supports DDR5 only, while the 430 supports DDR5 and LPDDR5X. Memory bandwidth is 83.2 GB/s for the 8745HX and 89.6 GB/s for the 430. ECC memory is supported on the 430 but not on the 8745HX. PCIe connectivity is Gen 5 with 28 lanes for the 8745HX, Gen 4 with 14 lanes for the 430.

Integrated graphics are Radeon 610M for the 8745HX and Radeon 840M for the 430. The multiplier is unlocked on the 8745HX but locked on the 430. The 8745HX has a part number of 100-000001851, while the 430 has 100-000001787. Release dates are April 2025 for the 8745HX and January 2026 for the 430.