AMD Ryzen 7 5800XT vs AMD Ryzen AI 9 HX 375 Comparison

The Verdict

The data presents two processors with opposite design philosophies. The AMD Ryzen 7 5800XT, a desktop chip on Socket AM4, shows a clear strength in single-threaded performance and legacy multi-threaded workloads. The AMD Ryzen AI 9 HX 375, a mobile chip on Socket FP8, counters with superior performance in modern multi-threaded and math-heavy tasks. Benchmark results indicate the Ryzen AI 9 HX 375 wins 11 of the 15 head-to-head comparisons, while the Ryzen 7 5800XT takes 4. The average benchmark score for the Ryzen AI 9 HX 375 is 46030, placing it in the 89th percentile of all CPUs, compared to the Ryzen 7 5800XT's average of 29879 and 81st percentile. For workloads involving floating-point math, integer math, physics, data compression, or extended instructions, the mobile chip is the clear choice. For single-core tasks and certain legacy rendering benchmarks, the desktop chip retains an edge. The Ryzen 7 5800XT also offers the only unlocked multiplier, making it the sole option for overclocking.

FAQ

Q: Which processor has the higher single-thread performance?

A: The Ryzen 7 5800XT. In Cinebench R23 single-core, it scores 3359 against the Ryzen AI 9 HX 375's 1988, a 69% advantage. It also leads in Cinebench R15 single-core with 338 versus 301, a 12.3% difference.

Q: Which processor wins in Cinebench R23 multi-core?

A: The Ryzen 7 5800XT. It scores 23794 versus 21812 for the Ryzen AI 9 HX 375, a 9.1% lead. However, in the older Cinebench R15 multi-core test, the Ryzen AI 9 HX 375 wins with 3334 against 2398, a 28.1% gap.

Q: How do the two chips compare in memory bandwidth?

A: The Ryzen AI 9 HX 375 has a significant advantage. It supports DDR5 and LPDDR5X memory with 89.6 GB/s bandwidth, while the Ryzen 7 5800XT is limited to DDR4 with 51.2 GB/s. The mobile chip also supports ECC, which the desktop chip does not.

Q: What are the core and thread counts for each processor?

A: The Ryzen AI 9 HX 375 has 12 cores and 24 threads, while the Ryzen 7 5800XT has 8 cores and 16 threads. The mobile chip also has a higher boost clock at 5.10 GHz versus 4.80 GHz for the desktop chip.

Q: Which processor has the larger L3 cache?

A: The Ryzen 7 5800XT has 32 MB of shared L3 cache, while the Ryzen AI 9 HX 375 has 16 MB. The desktop chip also has a smaller L1 cache per core at 64 KB versus 80 KB, and a smaller L2 cache per core at 512 KB versus 1 MB.

Q: What is the performance percentile ranking for each chip?

A: The Ryzen AI 9 HX 375 ranks in the 89th percentile of all CPUs, while the Ryzen 7 5800XT ranks in the 81st percentile. The mobile chip also has a higher average benchmark score of 46030 versus 29879 for the desktop chip.

Architecture Differences

The two processors come from different architectural eras. The Ryzen 7 5800XT uses the Zen 3 architecture, codenamed Vermeer, built on TSMC's 7 nm process. The Ryzen AI 9 HX 375 uses the Zen 5 architecture, codenamed Strix Point, built on TSMC's 4 nm process. The 4 nm node allows for a denser design, reflected in the die size: the Strix Point chip measures 233 mm², while the Vermeer chip measures 74 mm². Transistor counts are only listed for the desktop chip at 4,150 million.

The cache hierarchy differs substantially. The Ryzen 7 5800XT allocates 64 KB of L1 cache per core and 512 KB of L2 per core, with 32 MB of shared L3. The Ryzen AI 9 HX 375 allocates 80 KB of L1 per core and 1 MB of L2 per core, but only 16 MB of L3. The larger L3 on the desktop chip suggests a design optimized for reuse of shared data across fewer cores. The mobile chip's larger per-core L1 and L2 caches align with its higher core count and a hybrid Zen 5 / Zen 5c configuration.

The Ryzen AI 9 HX 375 includes integrated Radeon 890M graphics, while the Ryzen 7 5800XT has no integrated graphics. Memory support also diverges: the desktop chip uses DDR4, the mobile chip uses DDR5 and LPDDR5X. The mobile chip's memory bandwidth is 89.6 GB/s, nearly double the 51.2 GB/s of the desktop chip. PCIe lanes differ as well, with 20 lanes on the desktop chip versus 16 on the mobile chip, both at Gen 4.

Specification Differences

The Ryzen 7 5800XT has 8 cores and 16 threads, while the Ryzen AI 9 HX 375 has 12 cores and 24 threads. Base clocks differ sharply: 3.80 GHz for the desktop chip versus 2.00 GHz for the mobile chip. Boost clocks reverse the trend, with the mobile chip reaching 5.10 GHz against 4.80 GHz for the desktop chip. The desktop chip has a 105 W TDP, while the mobile chip has a 28 W TDP, reflecting the mobile segment's power constraints.

The Ryzen 7 5800XT uses AMD Socket AM4 and is a desktop part. The Ryzen AI 9 HX 375 uses AMD Socket FP8 and is a mobile part. The desktop chip has an unlocked multiplier; the mobile chip does not. The Ryzen 7 5800XT has a launch MSRP of $249, while no launch MSRP is listed for the mobile chip. The desktop chip supports ECC memory, while the mobile chip does not. The desktop chip was released on 2024-07-30, while the mobile chip was released on 2024-06-30.

Head-to-Head Benchmarks

The Ryzen AI 9 HX 375 dominates the PassMark suite. In floating-point math, it scores 75153 against 53808, a 28.4% advantage. Integer math shows a 22.8% lead, 121754 versus 93942. Physics scores favor the mobile chip by 25.5%, 1819 against 1355. Data compression shows a 13.1% edge, 404918 versus 352002. Extended instructions deliver a 17.1% lead, 29269 versus 24270. Random string sorting favors the mobile chip by 19.4%, 44552 versus 35911. PassMark multi-thread shows a 14.8% advantage, 32916 versus 28053. Single-thread PassMark also goes to the mobile chip, 3867 versus 3535, an 8.6% gap. Find prime numbers is nearly tied, with the mobile chip winning by only 2.5%, 122 versus 119.

The Ryzen 7 5800XT wins the remaining categories. Its largest victory is in Cinebench R23 single-core, 3359 versus 1988, a 69% gap. Cinebench R23 multi-core goes to the desktop chip by 9.1%, 23794 versus 21812. Cinebench R15 single-core shows a 12.3% edge, 338 versus 301. Data encryption is close, with the desktop chip winning by 3.2%, 21461 versus 20802. The only multi-core test the desktop chip wins is Cinebench R23; the mobile chip wins Cinebench R15 multi-core by 28.1%, 3334 versus 2398.

The average benchmark scores place these chips in different competitive tiers. The Ryzen AI 9 HX 375 sits near the Intel Core Ultra 5 235, with a delta of -0.1%, and the Intel Core i9-13900HX, also -0.1%. The Ryzen 7 5800XT sits near the AMD Ryzen 7 8845HS and Ryzen 7 7840HS, both with a delta of -0.3%, and the Ryzen 7 7840H at 0% delta.

Where Each One Wins

The Ryzen AI 9 HX 375 is the stronger choice for throughput-oriented tasks. Its wins in floating-point math, integer math, physics, data compression, extended instructions, and random string sorting indicate a processor suited for scientific computation, financial modeling, compression workloads, and any application that scales across many threads. The 12-core, 24-thread configuration with 89.6 GB/s memory bandwidth supports heavy parallel loads. Its 89th percentile ranking and higher average benchmark score of 46030 reinforce this position.

The Ryzen 7 5800XT wins in single-threaded performance, specifically in Cinebench R23 single-core with a 69% margin. Its 4.80 GHz boost clock, 32 MB L3 cache, and 105 W TDP allow it to outpace the mobile chip in lightly threaded workloads. It also wins Cinebench R23 multi-core, a test that may favor its higher sustained clocks and larger shared cache. Data encryption also favors the desktop chip, suggesting an edge in security-focused tasks. The unlocked multiplier is a significant advantage for users who wish to push clocks further.

The Cinebench R15 results present a split that is worth examining. The mobile chip wins multi-core by 28.1%, yet loses single-core by 12.3%. The desktop chip wins the newer Cinebench R23 multi-core test by 9.1% but loses the older R15 multi-core test by a wide margin. Benchmark results indicate that workload generation and thread scheduling can shift the balance. The Ryzen 7 5800XT is the only chip with an unlocked multiplier, making it the sole overclocking option. The Ryzen AI 9 HX 375 includes integrated Radeon 890M graphics, making it a complete package for mobile systems without a discrete GPU. The desktop chip requires a separate graphics card.