AMD Ryzen 5 9600X vs AMD Ryzen 5 PRO 8640U Comparison

Head-to-Head Benchmarks

The head-to-head comparison between the AMD Ryzen 5 PRO 8640U and the AMD Ryzen 5 9600X is heavily lopsided in favor of the desktop part. Out of 15 shared benchmark tests, the Ryzen 5 9600X wins 13, with the PRO 8640U taking only two, both in Cinebench. The data shows a clear pattern: the desktop chip dominates in raw compute workloads, while the mobile chip posts surprising wins in specific rendering tests.

The Ryzen 5 9600X’s largest victory comes in PassMark’s find prime numbers test, where it scores 233 against the PRO 8640U’s 78, a delta of 66.5%. This is a massive gap in integer-heavy, branch-predictor-sensitive work. The extended instructions test also shows a wide margin, with the 9600X at 28023 versus 19130, a 31.7% advantage. Floating point math follows at 60081 versus 45265, a 24.7% lead. Physics simulation shows a 42.6% gap (2012 versus 1154), indicating the desktop part’s superior sustained throughput under complex workloads.

In more common tasks, the 9600X leads passmark_multithread by 24.1% (30027 versus 22795), data compression by 23.5% (341021 versus 260925), and single-thread performance by 18.3% (4570 versus 3732). Integer math sees a 16.7% gap (89918 versus 74875), while random string sorting is closer at 10.7% (35946 versus 32114). The smallest 9600X win is in data encryption, at just 4.8% (16638 versus 15843), suggesting the PRO 8640U’s integrated security features narrow the gap in cryptographic workloads.

Cinebench R15 results favor the 9600X as well: multicore at 2691 versus 2014 (25.2% ahead) and singlecore at 342 versus 284 (17% ahead). The pattern is consistent: in nearly every PassMark subtest and Cinebench R15, the desktop chip pulls ahead by double digits.

However, the PRO 8640U’s two wins are notable for their magnitude. In Cinebench R23 multicore, the mobile chip scores 19982 against the 9600X’s 17528.5, a 14% lead. Even more striking is Cinebench R23 singlecore: the PRO 8640U hits 2821 versus 2183.5, a 29.2% advantage. These results are counterintuitive given the 9600X’s higher clock speeds and newer architecture, but the recorded data is unambiguous. It suggests that under certain sustained multi-threaded and single-threaded workloads, the PRO 8640U’s power management and thermal behavior allow it to outperform the desktop part, possibly due to different boost duration characteristics or workload-specific optimizations in the Zen 4 core.

The average benchmark scores place the PRO 8640U at 30254 and the 9600X at 29713, a difference of only 1.8%. Both sit at the 81st percentile among all CPUs. The PRO 8640U’s nearest rivals include the AMD Ryzen 7 2700X (0.1% ahead), the Ryzen 7 7736U (0.4% behind), and the Ryzen 5 7640HS (0.4% behind). The 9600X’s nearest rivals are the Ryzen 7 PRO 5755GE (0.2% ahead), the Ryzen 7 7840H (0.5% behind), and the Ryzen 7 5800XT (0.6% behind). This near-identical overall standing, despite the 9600X’s heavy head-to-head win count, reflects how Cinebench R23’s two wins skew the aggregate, and how the PRO 8640U’s strong R23 performance offsets many of its PassMark losses.

Architecture Differences

The two processors share six cores and twelve threads, but the underlying designs diverge significantly. The Ryzen 5 PRO 8640U uses the Zen 4 architecture on the Hawk Point codename, manufactured on a 4 nm process at TSMC. The 9600X uses the newer Zen 5 architecture on the Granite Ridge codename, also on a 4 nm TSMC node. This architectural gap explains the 9600X’s broad advantages in PassMark tests, as Zen 5 brings improved instruction-level parallelism and higher IPC.

Clock speeds differ notably. The PRO 8640U has a base clock of 3.50 GHz and a boost of 4.90 GHz, while the 9600X runs at 3.90 GHz base and 5.40 GHz boost. The desktop chip’s higher clocks directly contribute to its lead in single-threaded PassMark tests. However, the PRO 8640U’s Cinebench R23 singlecore win (2821 versus 2183.5) cannot be explained by clocks alone, as the 9600X is faster on paper. This points to workload-specific behavior, possibly related to the mobile chip’s lower thermal envelope allowing for sustained boosting in short bursts.

Cache configurations differ substantially. The PRO 8640U has 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. The 9600X has 80 KB of L1 per core, 1 MB of L2 per core, and 32 MB of shared L3. The doubled L3 cache on the 9600X (32 MB versus 16 MB) helps explain its lead in data compression and extended instructions, both of which benefit from larger working sets residing on-chip.

The transistor counts and die sizes are wildly different. The PRO 8640U integrates 25,000 million transistors on a 178 mm² die, while the 9600X has only 8,315 million transistors on a 70.6 mm² die. This reflects the PRO 8640U’s inclusion of a more capable integrated GPU (Radeon 760M) and additional mobile-focused logic, whereas the 9600X’s smaller die is optimized for desktop performance with a basic Radeon Graphics solution.

Memory support is identical in type (DDR5) and bandwidth (89.6 GB/s), with both using dual-channel configurations and ECC support. PCIe capabilities differ: the PRO 8640U offers Gen 4 with 20 lanes (CPU only), while the 9600X provides Gen 5 with 24 lanes (CPU only). This gives the desktop chip more and faster expansion options, relevant for discrete GPUs and NVMe storage.

The sockets separate them completely. The PRO 8640U uses AMD Socket FP7, a mobile platform, while the 9600X uses AMD Socket AM5, a desktop platform. The market segments confirm this: the PRO 8640U is mobile, the 9600X is desktop. The 9600X has an unlocked multiplier, enabling overclocking, while the PRO 8640U does not. Both are active production parts, with the PRO 8640U released on 2024-04-15 and the 9600X on 2024-08-07.

The Verdict

For users who prioritize raw compute throughput across a wide range of workloads, the data clearly favors the AMD Ryzen 5 9600X. Its 13 wins out of 15 head-to-head tests, with double-digit margins in most PassMark subtests, make it the stronger choice for physics simulation, integer math, floating point math, and data compression. The 42.6% lead in physics and 66.5% lead in prime number finding are decisive for scientific or simulation-heavy tasks. Its single-thread PassMark score of 4570 versus 3732 (18.3% ahead) also makes it the better pick for lightly threaded applications.

The Ryzen 5 PRO 8640U’s two Cinebench R23 wins are significant but narrow in scope. A 29.2% singlecore advantage and 14% multicore advantage in R23 suggest that for specific rendering or content-creation workflows using that benchmark, the mobile chip can actually outperform the desktop part. Its lower TDP of 28 W versus 65 W also implies better efficiency in constrained environments, though the database does not record power efficiency scores directly. The PRO 8640U’s integrated Radeon 760M is a stronger iGPU than the 9600X’s basic Radeon Graphics, which matters for systems without a discrete GPU.

The verdict depends on the use case. The 9600X is the default choice for desktop builders who need consistent, high-throughput performance across diverse workloads, especially those involving math, compression, or multi-threaded PassMark tests. The PRO 8640U is more suitable for mobile or compact systems where the Cinebench R23 workload is primary, or where the superior integrated graphics and lower power envelope are priorities. Both sit at the 81st percentile, and their average scores differ by only 1.8%, so neither is a universally superior product.

Specification Differences

The following fields differ between the two processors:

• Base Clock: PRO 8640U at 3.50 GHz, 9600X at 3.90 GHz
• Boost Clock: PRO 8640U at 4.90 GHz, 9600X at 5.40 GHz
• TDP: PRO 8640U at 28 W, 9600X at 65 W
• Socket: PRO 8640U on AMD Socket FP7, 9600X on AMD Socket AM5
• Architecture: PRO 8640U on Zen 4, 9600X on Zen 5
• Codename: PRO 8640U on Hawk Point, 9600X on Granite Ridge
• Generation: PRO 8640U in Ryzen 5 (Zen 4 (Hawk Point)), 9600X in Ryzen 5 (Zen 5 (Granite Ridge))
• Transistors: PRO 8640U at 25,000 million, 9600X at 8,315 million
• Die Size: PRO 8640U at 178 mm², 9600X at 70.6 mm²
• L1 Cache: PRO 8640U at 64 KB per core, 9600X at 80 KB per core
• L3 Cache: PRO 8640U at 16 MB shared, 9600X at 32 MB shared
• PCIe: PRO 8640U at Gen 4, 20 lanes (CPU only), 9600X at Gen 5, 24 lanes (CPU only)
• Integrated Graphics: PRO 8640U with Radeon 760M, 9600X with Radeon Graphics
• Market Segment: PRO 8640U is Mobile, 9600X is Desktop
• Release Date: PRO 8640U on 2024-04-15, 9600X on 2024-08-07
• Launch MSRP: The 9600X has a launch MSRP of $279; the PRO 8640U has no listed MSRP
• Multiplier Unlocked: PRO 8640U is locked, 9600X is unlocked
• Part Number: PRO 8640U has 100-000001318(FP7r2) and 100-000001378(FP7), 9600X has 100-000001405

Identical specs include 6 cores, 12 threads, 4 nm TSMC process, DDR5 memory support, dual-channel memory bus, 89.6 GB/s memory bandwidth, ECC support, 1 MB L2 per core, and the manufacturer AMD.

FAQ

Q: Which processor wins in Cinebench R23 multicore?

A: The AMD Ryzen 5 PRO 8640U wins, scoring 19982 versus the Ryzen 5 9600X’s 17528.5, a 14% advantage.

Q: How large is the single-thread performance gap in PassMark?

A: The Ryzen 5 9600X leads with a score of 4570 versus the PRO 8640U’s 3732, a delta of 18.3%.

Q: Do both processors support ECC memory?

A: Yes, both the Ryzen 5 PRO 8640U and the Ryzen 5 9600X have ECC memory support enabled.

Q: What is the difference in L3 cache size?

A: The Ryzen 5 9600X has 32 MB of shared L3 cache, while the Ryzen 5 PRO 8640U has 16 MB of shared L3 cache.

Q: Which processor has a higher boost clock?

A: The Ryzen 5 9600X has a boost clock of 5.40 GHz, compared to the Ryzen 5 PRO 8640U’s 4.90 GHz.

Q: Are both processors at the same performance percentile?

A: Yes, both the Ryzen 5 PRO 8640U and the Ryzen 5 9600X are at the 81st percentile among all CPUs, with average benchmark scores of 30254 and 29713, respectively.