AMD Ryzen 5 7645HX vs Intel Xeon 6353P Comparison

The Intel Xeon 6353P and AMD Ryzen 5 7645HX are both 84th-percentile CPUs, but they achieve that standing through completely different strategies. The Xeon 6353P is a desktop-derived server/workstation chip with 8 cores and 16 threads, while the Ryzen 5 7645HX is a 6-core, 12-thread mobile processor. The data shows a near-total split: the Intel part wins 8 benchmark comparisons, the AMD part wins 7. The Xeon 6353P dominates heavily in Cinebench multi-core (57.7% ahead) and single-core (72.1% ahead), but the Ryzen 5 7645HX counters with wins in most Passmark sub-tests, including data compression, encryption, and extended instructions. This is not a case of one chip being objectively better; it is a case of two chips with opposite performance profiles.

The Verdict

The Intel Xeon 6353P is the pick for sustained multi-threaded workloads that scale with core count and for applications that reward raw single-thread speed. Its Cinebench R23 multi-core score of 22058 versus the Ryzen's 13985 is a massive 57.7% gap, and its single-core score of 3114 versus 1809 is a 72.1% lead. If you are rendering, compiling, or running heavy scientific code, the Xeon 6353P is the clear choice. It also wins floating-point math by 30.1%, integer math by 12.1%, and physics by 23.2%, which points toward simulation and number-crunching strength.

The AMD Ryzen 5 7645HX is the pick for mobile deployments where power efficiency and a broader set of everyday integer/encryption tasks matter. It wins data compression by 5.5%, data encryption by 14.9%, extended instructions by 20.3%, prime number finding by 28.7%, and random string sorting by 9.3%. Its 45W TDP versus the Intel's 65W TDP makes it the more practical choice for laptops. However, its Cinebench R23 multi-core deficit is enormous, and its single-core score is barely over half of the Intel's. Choose the Ryzen if you need a balanced mobile chip that handles encryption and compression well; choose the Xeon if you need raw compute power and do not care about the power envelope.

Where Each One Wins

The Xeon 6353P wins decisively in compute-heavy, multi-threaded synthetic tests. Its Cinebench R15 multi-core score of 2223 trails the Ryzen's 2276 by only 2.3%, but the R23 multi-core result shows the real story: 22058 versus 13985, a 57.7% advantage. The single-core R23 result is even more lopsided at 72.1% in favor of Intel. The Xeon also takes Passmark floating-point math (63509 vs 48798, +30.1%), integer math (86836 vs 77432, +12.1%), physics (1845 vs 1497, +23.2%), and both single-thread tests (4226 vs 3907, +8.2%). These are the scores that matter for rendering, engineering simulation, and any workload that uses AVX or heavy arithmetic.

The Ryzen 5 7645HX wins the majority of Passmark's more specialized sub-tests. It leads in data compression (302256 vs 285581, +5.5%), data encryption (17900 vs 15228, +14.9%), extended instructions (22969 vs 18311, +20.3%), finding prime numbers (178 vs 127, +28.7%), and random string sorting (34434 vs 31226, +9.3%). It also edges out the Xeon in Cinebench R15 multi-core (2276 vs 2223, +2.3%) and Passmark multi-thread (26476 vs 25951, +2%). These wins point to a chip that handles compression, cryptography, and branch-heavy integer work more efficiently. The Ryzen's 5 nm process and 71 mm² die size likely explain its efficiency in these tasks.

Architecture Differences

The Intel Xeon 6353P uses Raptor Lake architecture on a 10 nm Intel process, with a die size of 257 mm². It has 8 cores and 16 threads, with 80 KB of L1 cache per core, 2 MB of L2 per core, and 24 MB of shared L3. Its base clock is 2.70 GHz and boost clock is 5.40 GHz. It supports both DDR4 and DDR5 memory in a dual-channel configuration, has ECC memory support, and provides Gen 5 PCIe with 16 lanes from the CPU. It has no integrated graphics and is sold as a Server/Workstation part on Intel Socket 1700. Its launch MSRP is $426.

The AMD Ryzen 5 7645HX uses Zen 4 architecture on a 5 nm TSMC process, with a die size of just 71 mm² and 6,570 million transistors. It has 6 cores and 12 threads, with 64 KB of L1 per core, 1 MB of L2 per core, and 32 MB of shared L3. Its base clock is 4.00 GHz and boost clock is 5.00 GHz. It supports only DDR5 memory in a dual-channel configuration, with a memory bandwidth of 83.2 GB/s. It also has ECC memory support and Gen 5 PCIe, but with 28 lanes from the CPU. It includes Radeon 610M integrated graphics and is a Mobile market segment part on AMD Socket FL1. The process node difference is stark: 10 nm versus 5 nm, and the die size difference (257 mm² vs 71 mm²) reflects the Xeon's larger core count and Intel's older process.

FAQ

Q: Which CPU has a higher boost clock?

A: The Intel Xeon 6353P boosts to 5.40 GHz, while the AMD Ryzen 5 7645HX boosts to 5.00 GHz.

Q: Which chip supports more memory types?

A: The Intel Xeon 6353P supports both DDR4 and DDR5, while the AMD Ryzen 5 7645HX supports only DDR5.

Q: Does either chip include integrated graphics?

A: The Intel Xeon 6353P has no integrated graphics, while the AMD Ryzen 5 7645HX includes a Radeon 610M iGPU.

Q: Which CPU has the larger L3 cache?

A: The AMD Ryzen 5 7645HX has 32 MB of shared L3 cache, compared to 24 MB on the Intel Xeon 6353P.

Q: What is the memory bandwidth of the AMD chip?

A: The AMD Ryzen 5 7645HX has a memory bandwidth of 83.2 GB/s. The Intel Xeon 6353P does not have a listed memory bandwidth figure.

Q: Which CPU has more PCIe lanes?

A: The AMD Ryzen 5 7645HX provides 28 Gen 5 lanes from the CPU, while the Intel Xeon 6353P provides 16 Gen 5 lanes.

Head-to-Head Benchmarks

The largest win for the Intel Xeon 6353P is in Cinebench R23 single-core, where it scores 3114 versus the Ryzen's 1809, a 72.1% advantage. This is a staggering gap that indicates the Xeon's 5.40 GHz boost clock and Raptor Lake architecture deliver vastly superior per-thread performance. The multi-core R23 result is also dominant: 22058 versus 13985, a 57.7% lead. These two results alone make the Xeon the superior choice for any workload that is heavily threaded or depends on single-thread responsiveness. The Xeon also wins floating-point math by 30.1% (63509 vs 48798), physics by 23.2% (1845 vs 1497), and integer math by 12.1% (86836 vs 77432), all of which confirm its strength in arithmetic-heavy tasks.

The AMD Ryzen 5 7645HX's largest win is in Passmark find prime numbers, where it scores 178 versus the Intel's 127, a 28.7% advantage. This is a test that stresses branch prediction and integer loops, and the Zen 4 architecture clearly handles it better. The Ryzen also wins extended instructions by 20.3% (22969 vs 18311), data encryption by 14.9% (17900 vs 15228), and random string sorting by 9.3% (34434 vs 31226). Its data compression win of 5.5% (302256 vs 285581) is notable because compression often benefits from larger caches, and the Ryzen has 32 MB of L3 versus the Xeon's 24 MB. The Ryzen also narrowly wins Passmark multi-thread (26476 vs 25951, +2%) and Cinebench R15 multi-core (2276 vs 2223, +2.3%), despite having fewer cores, which suggests its 4.00 GHz base clock and 5 nm process provide a per-core efficiency advantage in some tests.

The single-thread Passmark results show a closer race than Cinebench, with the Xeon winning 4226 to 3907, an 8.2% lead. This discrepancy between Cinebench R23 single-core (72.1% lead) and Passmark single-thread (8.2% lead) indicates that the Xeon's advantage is highly workload-specific, not universal. The data shows the Xeon is a specialist in certain compute patterns, while the Ryzen is more balanced across a wider range of tasks.

Specification Differences

The two CPUs differ in nearly every core specification. The Intel Xeon 6353P has 8 cores and 16 threads, while the AMD Ryzen 5 7645HX has 6 cores and 12 threads. The Intel base clock is 2.70 GHz, while the AMD base clock is 4.00 GHz. The Intel boost clock is 5.40 GHz, while the AMD boost clock is 5.00 GHz. The Intel TDP is 65W, while the AMD TDP is 45W. The Intel uses a 10 nm process from Intel, while the AMD uses a 5 nm process from TSMC. The Intel die size is 257 mm², while the AMD die size is 71 mm². The Intel has 80 KB of L1 per core, 2 MB of L2 per core, and 24 MB of shared L3. The AMD has 64 KB of L1 per core, 1 MB of L2 per core, and 32 MB of shared L3.

The memory support also differs: the Intel supports DDR4 and DDR5, while the AMD supports only DDR5. Both use dual-channel memory, but the AMD lists a memory bandwidth of 83.2 GB/s while the Intel does not list one. Both support ECC memory. The PCIe configuration differs, with the Intel providing 16 Gen 5 lanes and the AMD providing 28 Gen 5 lanes from the CPU. The Intel has no integrated graphics, while the AMD includes Radeon 610M. The Intel is on Socket 1700, while the AMD is on Socket FL1. The Intel is a Server/Workstation part, while the AMD is a Mobile part. The Intel's release date is 2025-02-23, while the AMD's is 2023-01-03. The Intel has a launch MSRP of $426, while the AMD has no launch MSRP listed.