AMD Ryzen 7 PRO 7745 vs AMD Ryzen 9 PRO 8945HS Comparison

Head-to-Head Benchmarks

The head-to-head data shows a clear overall winner, but the margin varies significantly depending on the workload. The AMD Ryzen 7 PRO 7745 takes 13 of the 17 recorded benchmarks, while the AMD Ryzen 9 PRO 8945HS wins only 4. However, the nature of those wins tells a nuanced story.

Starting with the Cinebench suite, the Ryzen 7 PRO 7745 is consistently ahead by nearly identical margins. In Cinebench R15 multicore, it scores 2809 against 2536, a 10.8% advantage. The single-core R15 result is similar: 396 versus 357, a 10.9% lead. This pattern repeats in R20 and R23. For R20 multicore, the scores are 11708 and 10569 (10.8% delta), and for R20 single-core, 1652 against 1491 (10.8% delta). The R23 multicore run shows 27877 versus 25165, again 10.8%, and R23 single-core shows 3935 versus 3552, also 10.8%. The consistency of that 10.8% to 10.9% delta across all six Cinebench tests suggests a fundamental per-core clock advantage for the Ryzen 7 PRO 7745, not a workload-specific quirk.

Moving to the Passmark suite, the Ryzen 7 PRO 7745 continues to lead in most categories, though with smaller margins. Data compression shows 386829 against 368884, a 4.9% win. Data encryption is 22821 versus 21820, a 4.6% margin. Extended instructions show a 5.4% lead (29216 vs 27714). The multithread score is 32733 against 30378, a 7.8% advantage. Physics is a standout: 1699 versus 1430, an 18.8% lead, the second-largest margin in the entire comparison. Random string sorting is 46759 versus 44668, a 4.7% win.

The largest single delta is in the find prime numbers test. Here the Ryzen 7 PRO 7745 scores 166, while the Ryzen 9 PRO 8945HS scores only 91. That is an 82.4% difference, a massive gap that points to a specific algorithmic advantage rather than a general speed difference. This test likely stresses integer division or branch prediction in a way that heavily favors the desktop-oriented design.

The Ryzen 9 PRO 8945HS wins are narrow but real. In floating point math, it scores 63490 against 63332, a 0.2% edge. Integer math shows 103390 versus 103330, a 0.1% lead. The single-thread Passmark test is its best win: 3920 versus 3849, a 1.8% margin. These are small victories, and they do not offset the Ryzen 7 PRO 7745's dominance elsewhere. However, they do indicate that the mobile chip is not universally slower; in pure math throughput, it is essentially on par or slightly ahead.

Architecture Differences

The two processors share the Zen 4 architecture, but they are built for different physical environments. The Ryzen 7 PRO 7745 uses the Raphael codename and fits the AMD Socket AM5. The Ryzen 9 PRO 8945HS uses the Hawk Point codename and fits the AMD Socket FP7. That socket difference alone explains the market segmentation: the former is a desktop-class part, the latter is mobile.

The process nodes differ. The Ryzen 7 PRO 7745 is on a 5 nm node, while the Ryzen 9 PRO 8945HS is on a 4 nm node. Both are fabricated by TSMC, but the 4 nm process allows the mobile chip to pack more transistors into a similar physical envelope. The transistor counts reflect this: the Ryzen 7 PRO 7745 has 6,570 million transistors on a 71 mm² die, while the Ryzen 9 PRO 8945HS has 25,000 million transistors on a 178 mm² die. That is a substantial difference in both density and absolute count. The mobile chip integrates far more logic, which is consistent with its stronger integrated graphics (Radeon 780M versus the older Radeon Graphics on the desktop part).

Cache allocation differs significantly. Both have 64 KB L1 per core and 1 MB L2 per core, which is identical. The L3 cache, however, is not: the Ryzen 7 PRO 7745 has 32 MB shared L3, while the Ryzen 9 PRO 8945HS has only 16 MB shared L3. That halving of L3 is a major factor in the benchmark differences, as the desktop chip can hold more working data close to the cores. The find prime numbers result, with its 82.4% delta, is likely influenced by this cache disparity.

Memory bandwidth also favors the desktop part, but not by as much as the L3 difference. The Ryzen 7 PRO 7745 has a memory bandwidth of 83.2 GB/s, while the Ryzen 9 PRO 8945HS reaches 89.6 GB/s. Interestingly, the mobile chip has the higher raw bandwidth figure, yet it loses in most memory-sensitive tests. Both support DDR5 and dual-channel memory, and both support ECC memory.

PCIe connectivity differs. The Ryzen 7 PRO 7745 offers Gen 5 with 24 lanes (CPU only), while the Ryzen 9 PRO 8945HS offers Gen 4 with 20 lanes (CPU only). That is a generational step down for the mobile part, reflecting power and thermal constraints. The Ryzen 7 PRO 7745 also has a base clock of 3.80 GHz and a boost clock of 5.30 GHz, while the Ryzen 9 PRO 8945HS has a higher base of 4.00 GHz but a lower boost of 5.20 GHz. The TDP difference is stark: 65 W for the desktop chip versus 45 W for the mobile chip.

Where Each One Wins

The Ryzen 7 PRO 7745 is the clear winner for sustained multi-core workloads. Its Cinebench R23 multicore score of 27877 against 25165 is a 10.8% lead, and the R20 and R15 multicore results show the same margin. For rendering, video encoding, or any heavily threaded task, the data points firmly toward the desktop part. The physics test, with an 18.8% lead, reinforces this: simulation and physics-based applications should favor the Ryzen 7 PRO 7745.

The find prime numbers test is the most lopsided result in the entire comparison, with an 82.4% delta favoring the Ryzen 7 PRO 7745. Any workload that relies on primality testing or similar integer-heavy, cache-dependent algorithms will see a massive advantage with the desktop chip. The smaller but still positive wins in data compression (4.9%), encryption (4.6%), extended instructions (5.4%), and random string sorting (4.7%) all point to the Ryzen 7 PRO 7745 being better for general productivity and security-related tasks.

The Ryzen 9 PRO 8945HS wins are confined to narrow math and single-thread scenarios. Its floating point score of 63490 edges out the Ryzen 7 PRO 7745 by 0.2%, and its integer math score of 103390 is a 0.1% improvement. The Passmark single-thread score of 3920 versus 3849 is a 1.8% win, which is the largest margin for the mobile chip. These results suggest that for lightly threaded, math-oriented tasks, the Ryzen 9 PRO 8945HS is not at a disadvantage. However, the margins are small enough that they would be imperceptible in real-world use.

Specification Differences

The two processors differ in several key specification fields. The series and generation labels differ: the Ryzen 7 PRO 7745 is from the 7000 series, while the Ryzen 9 PRO 8945HS is from the 8000 series. The sockets are different (AM5 versus FP7). The process node differs (5 nm versus 4 nm). The transistor count and die size are vastly different (6,570 million on 71 mm² versus 25,000 million on 178 mm²). The L3 cache is different (32 MB versus 16 MB). The memory bandwidth differs (83.2 GB/s versus 89.6 GB/s). The PCIe version and lane count differ (Gen 5 with 24 lanes versus Gen 4 with 20 lanes). The integrated graphics differ (Radeon Graphics versus Radeon 780M). The TDP differs (65 W versus 45 W). The base clock differs (3.80 GHz versus 4.00 GHz), and the boost clock differs (5.30 GHz versus 5.20 GHz). The release dates differ, with the Ryzen 7 PRO 7745 launching in June 2023 and the Ryzen 9 PRO 8945HS in April 2024. The market segments also differ: Server/Workstation versus Mobile.

FAQ

Q: Which processor has the higher boost clock?

A: The AMD Ryzen 7 PRO 7745 has a boost clock of 5.30 GHz, while the AMD Ryzen 9 PRO 8945HS has a boost clock of 5.20 GHz.

Q: How much more L3 cache does the Ryzen 7 PRO 7745 have?

A: The Ryzen 7 PRO 7745 has 32 MB of shared L3 cache, while the Ryzen 9 PRO 8945HS has 16 MB of shared L3 cache.

Q: What is the largest benchmark margin between the two?

A: The largest margin is in the Passmark find prime numbers test, where the Ryzen 7 PRO 7745 scores 166 against 91, an 82.4% lead.

Q: Does the Ryzen 9 PRO 8945HS win any benchmarks?

A: Yes, it wins 4 benchmarks: floating point math, integer math, and two single-thread Passmark tests. Its best win is the single-thread test with a 1.8% margin.

Q: Which processor has the higher TDP?

A: The Ryzen 7 PRO 7745 has a TDP of 65 W, while the Ryzen 9 PRO 8945HS has a TDP of 45 W.

Q: Do both processors support ECC memory?

A: Yes, both the AMD Ryzen 7 PRO 7745 and the AMD Ryzen 9 PRO 8945HS support ECC memory.

The Verdict

The data is unambiguous: the AMD Ryzen 7 PRO 7745 is the stronger processor in almost every measured category. It wins 13 of 17 head-to-head benchmarks, and its Cinebench margins are consistently around 10.8% in both single-core and multi-core tests. The 82.4% lead in find prime numbers is decisive for any workload involving primality testing or similar cache-sensitive integer operations. The physics test, with an 18.8% margin, further cements its position for simulation tasks.

The Ryzen 9 PRO 8945HS is not a poor performer, but its wins are marginal. A 0.2% lead in floating point math and a 0.1% lead in integer math are within noise. The 1.8% single-thread Passmark advantage is slightly more meaningful, but it does not translate into a Cinebench single-core win, where the Ryzen 7 PRO 7745 leads by 10.8%. The mobile chip does have a higher base clock (4.00 GHz versus 3.80 GHz) and a smaller process node (4 nm versus 5 nm), but that does not compensate for the halved L3 cache and lower boost clock.

For a desktop workstation or server environment, the Ryzen 7 PRO 7745 is the clear choice. Its higher TDP allows for sustained performance, and its larger cache and higher boost clock produce consistent wins across rendering, physics, and data processing workloads. For a mobile laptop, the Ryzen 9 PRO 8945HS offers competitive single-thread performance and a lower power envelope, but the data shows it will be slower in most multi-threaded scenarios. Choose the Ryzen 7 PRO 7745 for maximum throughput, choose the Ryzen 9 PRO 8945HS only if the mobile form factor is non-negotiable and the 10.8% multi-core deficit is acceptable.