AMD Ryzen 5 7500X3D vs AMD Ryzen 5 PRO 8645HS Comparison

Head-to-Head Benchmarks

The benchmark comparison between the AMD Ryzen 5 7500X3D and the AMD Ryzen 5 PRO 8645HS shows a clear split in workload types. The 7500X3D wins 4 of the 11 recorded tests, while the PRO 8645HS takes 7. The most dramatic margin belongs to the desktop chip in the prime number search test, where it scores 221 against the mobile chip's 73, a 202.7% advantage. This result is consistent with the 7500X3D's large shared L3 cache, which benefits iterative integer workloads that fit within its 96 MB of L3.

The physics test shows a similarly lopsided outcome. The 7500X3D scores 2779 versus 1208 for the PRO 8645HS, a 130% lead. This test measures simulation and rigid body calculations, which are heavily dependent on cache hierarchy and memory latency. The desktop chip's cache configuration delivers a decisive edge here. Multi-thread performance also favors the 7500X3D, with a score of 25047 against 23569, a 6.3% improvement. Data compression is close, with the 7500X3D scoring 271649 versus 265826, a 2.2% win.

The PRO 8645HS counters in single-threaded workloads. Its single-thread score of 3858 beats the 7500X3D's 3494, a 9.4% difference. This is reflected in its higher boost clock of 5.00 GHz versus 4.50 GHz. The mobile chip also wins in data encryption (17387 versus 15797, a 9.1% lead), extended instructions (21212 versus 20455, a 3.6% lead), floating point math (45481 versus 43594, a 4.1% lead), and integer math (72740 versus 70774, a 2.7% lead). Random string sorting goes to the PRO 8645HS as well, 35472 versus 32999, a 7% margin.

Looking at the aggregate data, the 7500X3D has an average benchmark score of 44573 across all recorded tests, placing it at the 89th percentile of all CPUs. The PRO 8645HS averages 30879, sitting at the 82nd percentile. The desktop chip's nearest rivals in the database include the Intel Core Ultra X9 388H (average score 44466, delta 0.2%), the Intel Core i9-13950HX (44342, delta 0.5%), the AMD Ryzen AI Max 385 (44309, delta 0.6%), and the Intel Core i5-14600 (44889, delta -0.7%). The mobile chip's nearest rivals are the AMD Ryzen 7 8700F (30746, delta 0.4%), the Intel Core i7-13700TE (31028, delta -0.5%), the AMD Ryzen 9 8945HS (31074, delta -0.6%), and the Intel Core i7-12700F (31081, delta -0.6%).

The Verdict

The data indicates two distinct usage profiles. The AMD Ryzen 5 7500X3D is the stronger choice for multi-threaded, cache-sensitive workloads. Its wins in prime number finding, physics simulation, and multithread performance are substantial, with deltas of 202.7%, 130%, and 6.3% respectively. These are not marginal differences; they represent a category-level advantage in specific computational patterns. The 7500X3D also carries a 96 MB shared L3 cache, which is six times larger than the PRO 8645HS's 16 MB shared L3, explaining its dominance in data-heavy iterative tasks.

The AMD Ryzen 5 PRO 8645HS compensates with higher clock speeds and better single-thread execution. Its base clock of 4.30 GHz and boost clock of 5.00 GHz exceed the 7500X3D's 4.00 GHz and 4.50 GHz. The single-thread score gap of 9.4% is consistent across both recorded single-thread tests. The mobile chip also leads in encryption, extended instructions, floating point, integer math, and string sorting, suggesting a more balanced general-purpose profile. Its average benchmark score is lower overall, but its wins are spread across more test categories.

For users prioritizing raw multi-core throughput and cache-heavy scientific or simulation workloads, the 7500X3D is the clear winner from the recorded data. For users needing faster single-thread response, cryptographic operations, or mixed integer/floating point tasks, the PRO 8645HS shows a measurable advantage. The desktop chip's 65 W TDP versus the mobile chip's 45 W TDP reflects their market segments: the 7500X3D is a desktop part on AMD Socket AM5, while the PRO 8645HS is a mobile part on AMD Socket FP7. Neither chip has an unlocked multiplier, so overclocking is not part of the equation.

Where Each One Wins

The AMD Ryzen 5 7500X3D wins in tests where cache capacity and memory latency dominate. Prime number finding is a classic example: the algorithm repeatedly accesses a small working set, and the 96 MB L3 cache allows the entire dataset to reside on-chip. The 202.7% delta over the PRO 8645HS shows that the smaller 16 MB L3 cache on the mobile chip forces frequent memory traffic, drastically reducing throughput. Physics simulation similarly benefits from the larger cache, with a 130% advantage. Multi-thread performance, which often scales with core count and cache coherence, also favors the desktop chip at 6.3%. Data compression is a narrow win at 2.2%, indicating that the PRO 8645HS is competitive but not equal in this area.

The AMD Ryzen 5 PRO 8645HS wins in single-threaded and latency-sensitive tests. Its 9.4% single-thread advantage comes from a higher boost clock and a smaller, faster L3 cache that reduces access latency for sequential workloads. Data encryption shows a 9.1% lead, likely due to the same clock advantage and the AES-NI instruction path. Extended instructions (3.6% lead), floating point math (4.1% lead), and integer math (2.7% lead) all follow the single-thread pattern. Random string sorting, which is memory-bandwidth sensitive, goes to the PRO 8645HS by 7%, consistent with its higher memory bandwidth of 89.6 GB/s versus 83.2 GB/s.

The wins are not arbitrary. The 7500X3D's victories are all in categories where its cache size and multi-thread coordination provide a structural benefit. The PRO 8645HS's victories are in categories where clock speed and memory bandwidth per thread matter more. The benchmark database shows 7 wins for the mobile chip and 4 for the desktop chip, but the magnitude of the desktop chip's wins in prime numbers and physics outweighs the narrower margins in several of the mobile chip's victories.

FAQ

Q: Which processor has the higher single-thread benchmark score?

A: The AMD Ryzen 5 PRO 8645HS scores 3858 in the PassMark single-thread test, versus 3494 for the AMD Ryzen 5 7500X3D, a 9.4% advantage for the mobile chip.

Q: What is the largest performance delta in the head-to-head results?

A: The largest delta is in the PassMark find prime numbers test, where the 7500X3D scores 221 against the PRO 8645HS's 73, a 202.7% difference.

Q: How do the two chips compare in multi-thread performance?

A: The 7500X3D scores 25047 in PassMark multithread, while the PRO 8645HS scores 23569, giving the desktop chip a 6.3% lead.

Q: Which chip has more L3 cache?

A: The AMD Ryzen 5 7500X3D has 96 MB of shared L3 cache, while the AMD Ryzen 5 PRO 8645HS has 16 MB of shared L3 cache.

Q: What are the average benchmark scores for each processor?

A: The 7500X3D averages 44573 across all recorded tests, placing it at the 89th percentile. The PRO 8645HS averages 30879, placing it at the 82nd percentile.

Q: Do both processors support ECC memory?

A: Yes, both the AMD Ryzen 5 7500X3D and the AMD Ryzen 5 PRO 8645HS support ECC memory.

Architecture Differences

The two processors share the same Zen 4 core architecture but differ in their physical implementation and cache configuration. The 7500X3D uses the Raphael codename, part of the 7000 series, built on a 5 nm process at TSMC. It has 11,270 million transistors on a 71 mm² die. The PRO 8645HS uses the Hawk Point codename, part of the 8000 series, built on a 4 nm process at TSMC. It packs 25,000 million transistors on a 178 mm² die, reflecting a more integrated design with a larger memory controller and graphics block.

The cache hierarchy diverges significantly. Both have 64 KB of L1 per core and 1 MB of L2 per core, identical in structure. The L3 cache is where the difference appears: the 7500X3D offers 96 MB shared, while the PRO 8645HS offers only 16 MB shared. This six-fold difference is the primary architectural factor behind the desktop chip's wins in cache-sensitive tests. The PRO 8645HS compensates with a 4 nm process, which allows higher clock speeds at lower power, explaining its 5.00 GHz boost clock versus 4.50 GHz.

Integrated graphics also differ. The 7500X3D includes Radeon Graphics, while the PRO 8645HS includes the Radeon 760M. Both support DDR5 memory in dual-channel configuration, but the PRO 8645HS has a higher memory bandwidth at 89.6 GB/s versus 83.2 GB/s. PCIe support differs as well: the 7500X3D uses Gen 5 with 24 lanes (CPU only), while the PRO 8645HS uses Gen 4 with 20 lanes (CPU only). The desktop chip's PCIe Gen 5 support provides more bandwidth for expansion cards, while the mobile chip's PCIe Gen 4 is sufficient for its intended use.

Specification Differences

The AMD Ryzen 5 7500X3D and AMD Ryzen 5 PRO 8645HS differ in several key specifications. The 7500X3D has a base clock of 4.00 GHz and a boost clock of 4.50 GHz, while the PRO 8645HS runs at 4.30 GHz base and 5.00 GHz boost. The desktop chip has a TDP of 65 W, while the mobile chip has a TDP of 45 W. The 7500X3D uses AMD Socket AM5, while the PRO 8645HS uses AMD Socket FP7.

The process nodes differ: 5 nm for the 7500X3D versus 4 nm for the PRO 8645HS. Transistor counts are 11,270 million for the desktop chip and 25,000 million for the mobile chip. Die sizes are 71 mm² for the 7500X3D and 178 mm² for the PRO 8645HS. The L3 cache differs as noted: 96 MB shared versus 16 MB shared. Memory bandwidth is 83.2 GB/s for the desktop chip and 89.6 GB/s for the mobile chip. PCIe support is Gen 5 with 24 lanes for the 7500X3D and Gen 4 with 20 lanes for the PRO 8645HS.

The market segments differ: Desktop for the 7500X3D and Mobile for the PRO 8645HS. Release dates show the desktop chip launched on 2025-11-11, while the mobile chip launched on 2024-04-15. The 7500X3D has a launch MSRP of $269; the PRO 8645HS has no recorded launch MSRP. Part numbers are 100-000001904 for the desktop chip and 100-000001315(FP7r2),100-000001388(FP7) for the mobile chip. Neither chip has an unlocked multiplier, and both are currently in active production.