AMD Ryzen 9 9850HX vs Intel Xeon 6520P Comparison

AMD Ryzen 9 9850HX vs Intel Xeon 6520P is a study in extremes: a 55-watt mobile flagship with 12 cores squaring off against a 210-watt server/workstation chip with 24 cores. The data shows two very different design philosophies, and the benchmark results reflect that split clearly. This analysis covers the full comparison, from raw compute wins to architectural tradeoffs, so you can see exactly where each processor belongs.

Head-to-Head Benchmarks

The Intel Xeon 6520P dominates the multi-threaded and throughput-oriented workloads, while the AMD Ryzen 9 9850HX takes the single-thread crown. Out of the 11 recorded PassMark comparisons, Intel wins 9 and AMD wins 2. The margins, however, tell a more nuanced story.

The single-thread results are the clearest AMD victory. The Ryzen 9 9850HX scores 4461 in PassMark single-thread tests, which is 32.9% higher than the Xeon 6520P's 3356. That is a massive lead for a mobile part, and it shows up in both the `passmark_single_thread` and `passmark_singlethread` entries, which record identical scores. For any workload that relies on low-latency, single-core responsiveness, the AMD chip is the better choice by a wide margin.

Every other benchmark in the comparison goes to Intel. The smallest Intel win is in extended instructions, where the Xeon 6520P scores 64557 versus 53817, a 16.6% advantage. That covers AVX-heavy and specialized instruction workloads. The larger wins come in raw compute. Floating point math shows the Xeon 6520P at 162862 versus 115062, a 29.4% gap. Integer math follows a similar pattern: 214288 versus 172943, a 19.3% lead for Intel. Data compression is another strong Intel result, 841518 versus 662381, a 21.3% margin, and random string sorting goes to Intel by 26.7% (95736 versus 70175).

The biggest single delta in the entire comparison is PassMark physics. The Xeon 6520P posts 7209, while the Ryzen 9 9850HX manages only 3054. That is a 57.6% difference, the largest percentage gap recorded in this matchup. Physics simulations, which often scale with core count and memory bandwidth, clearly favor the Intel part. Data encryption also goes heavily to Intel: 45188 versus 32139, a 28.9% advantage. Prime number finding, a classic integer-heavy test, sees the Xeon 6520P score 526 against 323, a 38.6% lead.

The multithreaded PassMark score, a broad measure of overall parallel performance, lands at 62936 for Intel and 51722 for AMD, a 17.8% gap. That is actually a smaller margin than several of the individual subtests, which suggests the Ryzen 9 9850HX holds up better in mixed workloads that blend single-threaded responsiveness with moderate parallelism. The data also shows the Intel chip sits at the 96th percentile of all CPUs overall, while the AMD part is at the 97th, which is a reminder that the Ryzen chip's single-thread strength pulls its aggregate standing above what its raw multi-core output would suggest.

Architecture Differences

The two processors come from fundamentally different design targets. The AMD Ryzen 9 9850HX uses the Zen 5 architecture, codenamed Fire Range, built on a 4 nm process at TSMC. It packs 12 cores and 24 threads in a mobile package with a 55 watt TDP, socketed into AMD Socket FL1. The Intel Xeon 6520P uses the Granite Rapids architecture, codenamed Granite Rapids-SP, built on Intel's 5 nm process. It doubles the core count to 24 cores and 48 threads, but requires a 210 watt TDP and uses Intel Socket 4710.

Cache layouts differ substantially. The Ryzen 9 9850HX carries 80 KB of L1 per core, 1 MB of L2 per core, and 64 MB of shared L3. Intel's Xeon 6520P has a larger per-core footprint: 112 KB of L1 per core, 2 MB of L2 per core, and 144 MB of shared L3. That larger cache hierarchy, combined with double the cores, helps explain the Intel part's edge in compression and encryption workloads, which often benefit from larger working sets residing in cache.

Memory architecture is another major divergence. Both support DDR5 and ECC memory, but the Ryzen 9 9850HX runs a dual-channel memory bus with 89.6 GB/s of bandwidth. The Xeon 6520P runs an eight-channel memory bus with 409.6 GB/s, which is a massive difference in theoretical throughput. That bandwidth advantage is almost certainly a factor in the physics benchmark result, where the Intel part leads by 57.6%.

PCIe connectivity also differs. The AMD chip exposes Gen 5 with 28 lanes from the CPU, while the Intel Xeon 6520P offers Gen 5 with 88 lanes. For server and workstation workloads that need many expansion cards, NVMe drives, or accelerators, the Intel part has a clear I/O advantage. The Ryzen 9 9850HX includes integrated Radeon 610M graphics, while the Xeon 6520P has no integrated graphics at all. The AMD chip has an unlocked multiplier, the Intel chip does not. The Xeon 6520P was released on 2025-02-23 with a launch MSRP of $1295, while the Ryzen 9 9850HX lists no launch MSRP.

FAQ

Q: Which processor has better single-thread performance?

A: The AMD Ryzen 9 9850HX. It scores 4461 in PassMark single-thread tests, which is 32.9% higher than the Intel Xeon 6520P's 3356.

Q: Which processor wins in multi-threaded workloads?

A: The Intel Xeon 6520P. Its PassMark multithread score is 62936 versus 51722 for the AMD chip, a 17.8% lead. Intel also wins every other multi-threaded subtest in the comparison.

Q: What is the largest performance gap between the two?

A: PassMark physics. The Intel Xeon 6520P scores 7209, which is 57.6% higher than the AMD Ryzen 9 9850HX's 3054.

Q: How do core counts compare?

A: The Intel Xeon 6520P has 24 cores and 48 threads. The AMD Ryzen 9 9850HX has 12 cores and 24 threads, exactly half as many.

Q: Do both processors support ECC memory?

A: Yes, both the AMD Ryzen 9 9850HX and the Intel Xeon 6520P support ECC memory.

Q: What is the memory bandwidth difference?

A: The Intel Xeon 6520P supports eight-channel DDR5 with 409.6 GB/s of bandwidth. The AMD Ryzen 9 9850HX supports dual-channel DDR5 with 89.6 GB/s.

Specification Differences

The AMD Ryzen 9 9850HX and Intel Xeon 6520P differ in nearly every key specification:

• Cores: 12 (AMD) versus 24 (Intel)
• Threads: 24 (AMD) versus 48 (Intel)
• Base clock: 3.00 GHz (AMD) versus 2.40 GHz (Intel)
• Boost clock: 5.20 GHz (AMD) versus 4.00 GHz (Intel)
• TDP: 55 W (AMD) versus 210 W (Intel)
• Socket: AMD Socket FL1 (AMD) versus Intel Socket 4710 (Intel)
• Architecture: Zen 5 (AMD) versus Granite Rapids (Intel)
• Process node: 4 nm (AMD) versus 5 nm (Intel)
• Foundry: TSMC (AMD) versus Intel (Intel)
• Die size: 2x 70.6 mm² (AMD) versus 598 mm² (Intel)
• L1 cache: 80 KB per core (AMD) versus 112 KB per core (Intel)
• L2 cache: 1 MB per core (AMD) versus 2 MB per core (Intel)
• L3 cache: 64 MB (AMD) versus 144 MB shared (Intel)
• Memory bus: Dual-channel (AMD) versus Eight-channel (Intel)
• Memory bandwidth: 89.6 GB/s (AMD) versus 409.6 GB/s (Intel)
• PCIe lanes: 28 (AMD) versus 88 (Intel)
• Integrated graphics: Radeon 610M (AMD) versus N/A (Intel)
• Multiplier unlocked: Yes (AMD) versus No (Intel)
• Release date: 2025-01-05 (AMD) versus 2025-02-23 (Intel)

The Verdict

The data supports a clear split: the Intel Xeon 6520P is the stronger compute engine for parallel, bandwidth-hungry, and server-oriented workloads, while the AMD Ryzen 9 9850HX is the better choice for single-thread responsiveness and power-constrained mobile systems.

If your priority is maximum multi-threaded throughput, the Xeon 6520P wins every relevant benchmark. Its 24 cores, 48 threads, eight-channel memory, and 144 MB L3 cache deliver leads from 16.6% in extended instructions to 57.6% in physics. The Intel part also holds the higher overall PassMark multithread score by 17.8%. For compression, encryption, integer math, floating point math, prime finding, and string sorting, the Xeon 6520P is the pick.

If your priority is single-thread performance or you need a processor that fits in a mobile chassis, the Ryzen 9 9850HX is the answer. It leads by 32.9% in single-thread benchmarks, has a higher boost clock at 5.20 GHz versus 4.00 GHz, and runs at a 55 watt TDP versus 210 watts. Its 97th percentile standing across all CPUs also edges out the Xeon 6520P's 96th percentile, which reflects how well the AMD chip performs relative to the entire database despite having half the cores.

Where Each One Wins

The Intel Xeon 6520P wins in every multi-threaded benchmark category in this comparison: data compression, data encryption, extended instructions, prime number finding, floating point math, integer math, multithreaded performance, physics, and random string sorting. It is the right choice for server racks, workstation builds, and any workload that can saturate 48 threads and 409.6 GB/s of memory bandwidth. Its 88 PCIe Gen 5 lanes also make it suited for systems with many expansion devices.

The AMD Ryzen 9 9850HX wins in single-thread performance, where its 4461 score beats the Xeon 6520P by 32.9%. It also carries the advantages of a 5.20 GHz boost clock, a 4 nm process, an unlocked multiplier, and integrated Radeon 610M graphics. For a mobile workstation or a compact system where power draw and single-core speed matter more than raw parallel throughput, the Ryzen 9 9850HX is the better fit. The recorded data does not show any multi-threaded workload where the AMD chip comes out ahead, so the deciding factor for this part is single-thread speed and platform flexibility rather than absolute compute output.