AMD Ryzen 5 8645HS vs Intel Xeon 6353P Comparison

The Intel Xeon 6353P and AMD Ryzen 5 8645HS occupy very different corners of the processor market, yet the benchmark data shows a clear overall winner. Across fifteen recorded head-to-head tests, the Intel Xeon 6353P takes twelve wins, while the AMD Ryzen 5 8645HS manages three. The margin in several of Intel's victories is substantial, particularly in rendering and physics workloads, making the Xeon the stronger choice for compute-heavy tasks. The Ryzen 5 8645HS, however, demonstrates specific strengths in encryption, extended instruction throughput, and string sorting, areas where its architecture provides a measurable edge.

Head-to-Head Benchmarks

The largest single gap between these two processors appears in the Cinebench R23 multi-core test. The Intel Xeon 6353P scores 22058, while the AMD Ryzen 5 8645HS scores 13220. That is a 66.9% advantage for Intel, a commanding lead in a workload that represents sustained multi-threaded rendering. The single-core version of the same test shows an even steeper relative difference: Intel scores 3114 against AMD's 1714, a 81.7% margin. This is the biggest percentage win for either chip in the entire comparison, and it signals that the Xeon's per-core performance is not merely competitive but decisively ahead.

Cinebench R15 results follow the same pattern, though with narrower margins. In multi-core, Intel posts 2223 versus AMD's 2094, a 6.2% edge. In single-core, Intel leads 313 to 270, a 15.9% advantage. These results reinforce the picture from R23: the Xeon 6353P holds the upper hand in both lightly and heavily threaded rendering scenarios, with the gap widening as the workload scales.

PassMark tests add more texture to the comparison. In floating-point math, Intel scores 63509 against AMD's 44833, a 41.7% lead. Integer math shows Intel ahead at 86836 versus 72640, a 19.5% margin. Prime number finding, a test sensitive to both clock speed and architecture efficiency, favors Intel heavily: 127 versus 75, a 69.3% difference. The PassMark multithread score also goes to Intel, 25951 to 22586, a 14.9% advantage. Physics simulation, another multi-threaded workload, shows Intel at 1845 and AMD at 1095, a 68.5% gap. Data compression favors Intel as well, 285581 to 265483, a 7.6% edge.

The AMD Ryzen 5 8645HS wins are narrower but real. Data encryption shows AMD ahead at 15588 versus Intel's 15228, a 2.3% margin. Extended instructions, a test that exercises AVX and similar instruction sets, goes to AMD with 20003 against Intel's 18311, an 8.5% edge. Random string sorting is the closest contest of all: AMD scores 31748, Intel 31226, a 1.6% difference. These wins suggest that while Intel dominates raw throughput and rendering, AMD's Zen 4 architecture handles certain specialized workloads with greater efficiency.

The single-thread PassMark result, recorded twice in the data, gives Intel a 4226 to 3653 victory, a 15.7% margin. This aligns with the Cinebench single-core results and confirms that the Xeon 6353P is the faster chip when only one thread is active.

The Verdict

The data points to the Intel Xeon 6353P as the stronger processor for users whose workloads involve rendering, physics simulation, prime number computation, or heavy math throughput. In eleven of the fifteen recorded benchmarks, Intel wins by double-digit percentages, and in several cases the margin exceeds 40%. The average benchmark score for the Xeon sits at 33844, placing it in the 84th percentile of all CPUs in the database. The Ryzen 5 8645HS averages 33244, which lands in the 83rd percentile. These are close overall positions, but the distribution of wins is not close at all: Intel's victories are large, while AMD's are mostly single-digit.

For a server or workstation segment processor, this result is expected. The Xeon 6353P is built for sustained compute, and the benchmark data reflects that. The Ryzen 5 8645HS, as a mobile part, posts respectable numbers but falls behind in the most demanding tests. Users who prioritize encryption throughput, extended instruction performance, or string sorting efficiency might find the AMD chip appealing, but those are narrow use cases. For general compute, multi-threaded rendering, and single-thread responsiveness, the Intel Xeon 6353P is the clear choice based on the recorded measurements.

Architecture Differences

The two processors are built on fundamentally different foundations. The Intel Xeon 6353P uses the Raptor Lake architecture, specifically the Raptor Lake-R variant, and is manufactured on a 10 nm process at Intel's own foundry. The AMD Ryzen 5 8645HS uses the Zen 4 architecture under the Hawk Point codename, built on a 4 nm process at TSMC. This process difference is significant: the AMD chip's 4 nm node is denser and more power-efficient per transistor, which helps explain its lower 45 W TDP versus Intel's 65 W.

Core counts differ as well. The Intel chip has 8 cores and 16 threads, while the AMD chip has 6 cores and 12 threads. Intel's extra two cores and four threads contribute to its multi-core wins, though the size of the R23 multi-core gap suggests architecture efficiency plays a role too. Cache layouts are distinct: Intel provides 80 KB of L1 per core, 2 MB of L2 per core, and 24 MB of shared L3. AMD provides 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. Intel's larger caches at every level give it more on-die data capacity.

Clock speeds tell a different story. AMD's base clock is 4.30 GHz, notably higher than Intel's 2.70 GHz. The boost clocks are closer: Intel reaches 5.40 GHz, AMD reaches 5.00 GHz. The higher base clock on the AMD chip likely helps it in bursty, short-duration workloads, while Intel's higher boost clock and larger cache help in sustained single-thread tasks.

Memory support differs. Intel supports both DDR4 and DDR5, while AMD supports only DDR5. Both use dual-channel memory buses. AMD lists a memory bandwidth of 89.6 GB/s; no such figure is recorded for Intel. ECC memory is supported on the Intel chip but not on the AMD chip, which is consistent with the Xeon's server and workstation positioning.

PCIe connectivity also splits along market lines. Intel offers Gen 5 with 16 lanes (CPU only), while AMD offers Gen 4 with 20 lanes (CPU only). The Intel chip has no integrated graphics; the AMD chip includes the Radeon 760M. The AMD processor is unlocked in the sense that it is a mobile part with a 45 W TDP, but neither chip has an unlocked multiplier.

The physical packages differ entirely. Intel uses Socket 1700, AMD uses Socket FP8. The Intel die measures 257 mm², while AMD's measures 178 mm². AMD lists 25,000 million transistors; no transistor count is recorded for Intel. The AMD chip was released on December 5, 2023, while Intel's release date is February 23, 2025. The Intel part carries a launch MSRP of $426; no launch MSRP is recorded for the AMD chip.

FAQ

Q: Which processor is faster in multi-core rendering?

A: The Intel Xeon 6353P. In Cinebench R23 multi-core, it scores 22058 against the AMD Ryzen 5 8645HS's 13220, a 66.9% advantage. In Cinebench R15 multi-core, Intel leads 2223 to 2094, a 6.2% edge.

Q: Does the AMD Ryzen 5 8645HS win any benchmarks?

A: Yes. It wins PassMark data encryption (15588 versus 15228, a 2.3% margin), extended instructions (20003 versus 18311, an 8.5% margin), and random string sorting (31748 versus 31226, a 1.6% margin).

Q: Which chip has the higher single-core performance?

A: The Intel Xeon 6353P. It scores 3114 in Cinebench R23 single-core versus AMD's 1714, an 81.7% gap. In Cinebench R15 single-core, Intel leads 313 to 270, a 15.9% margin. PassMark single-thread also favors Intel, 4226 to 3653, a 15.7% edge.

Q: How do the core and thread counts compare?

A: The Intel Xeon 6353P has 8 cores and 16 threads. The AMD Ryzen 5 8645HS has 6 cores and 12 threads. Intel's additional cores contribute to its multi-threaded wins.

Q: Which processor supports ECC memory?

A: Only the Intel Xeon 6353P supports ECC memory. The AMD Ryzen 5 8645HS does not.

Q: What are the process nodes for each chip?

A: The Intel Xeon 6353P is built on Intel's 10 nm process. The AMD Ryzen 5 8645HS is built on TSMC's 4 nm process. The AMD chip is manufactured at a denser node with a smaller die size of 178 mm² versus Intel's 257 mm².

Where Each One Wins

The Intel Xeon 6353P wins in every rendering and compute-heavy category. Cinebench R23 multi-core and single-core, Cinebench R15 multi-core and single-core, PassMark floating-point math, integer math, prime number finding, multithread, physics, data compression, and the PassMark single-thread test all go to Intel. This is the chip for workloads that demand sustained throughput: 3D rendering, scientific computation, physics simulation, and any task that scales across many threads. The 66.9% lead in R23 multi-core and the 41.7% lead in floating-point math are the clearest signals. The 65 W TDP and server or workstation market segment reinforce this positioning.

The AMD Ryzen 5 8645HS wins in three specialized areas. Data encryption, extended instructions, and random string sorting are its territory. The 8.5% margin in extended instructions is the largest of its wins, suggesting that workloads using advanced instruction sets may run relatively better on the Zen 4 architecture. The 89.6 GB/s memory bandwidth and 4 nm process also make it a more power-efficient option for mobile systems. Its 45 W TDP and integrated Radeon 760M graphics mean it can serve in thin-and-light laptops where the Xeon's 65 W TDP and lack of integrated graphics would be a disadvantage.

Specification Differences

The two processors differ in nearly every major specification category. The Intel Xeon 6353P has 8 cores and 16 threads; the AMD Ryzen 5 8645HS has 6 cores and 12 threads. Intel's base clock is 2.70 GHz versus AMD's 4.30 GHz. Intel's boost clock is 5.40 GHz versus AMD's 5.00 GHz. TDP differs: Intel at 65 W, AMD at 45 W. Intel uses Socket 1700; AMD uses Socket FP8. Intel is built on Raptor Lake at 10 nm; AMD is built on Zen 4 at 4 nm. Intel's die size is 257 mm²; AMD's is 178 mm². Memory support splits: Intel accepts DDR4 and DDR5, AMD accepts only DDR5. ECC memory is available on Intel but not AMD. PCIe generation and lanes differ: Intel Gen 5 with 16 lanes, AMD Gen 4 with 20 lanes. Intel has no integrated graphics; AMD includes the Radeon 760M. Intel's market segment is server or workstation; AMD's is mobile. Intel's release date is February 23, 2025; AMD's is December 5, 2023. Intel carries a launch MSRP of $426; no launch MSRP is recorded for AMD. Cache hierarchies differ at every level: Intel has 80 KB L1 per core, 2 MB L2 per core, and 24 MB shared L3; AMD has 64 KB L1 per core, 1 MB L2 per core, and 16 MB shared L3. AMD records 25,000 million transistors; Intel does not list a transistor count. Memory bandwidth is listed for AMD at 89.6 GB/s; no figure is recorded for Intel. The AMD chip has three recorded part numbers, while Intel has one. Neither chip has an unlocked multiplier.