AMD Ryzen 5 PRO 8540U vs Intel Core Ultra 5 225T Comparison

The Verdict

The benchmark database shows a clear separation between these two processors. The Intel Core Ultra 5 225T wins every single recorded head-to-head benchmark, taking all 17 comparisons. The AMD Ryzen 5 PRO 8540U does not record a single victory in any test, whether single-threaded or multi-threaded, integer or floating-point math, compression or encryption.

The Ryzen 5 PRO 8540U sits at the 76th percentile of all CPUs in the database, with an average benchmark score of 23709. Its nearest rivals include the Intel Core i5-11500 with an average score of 23718 (a 0% delta), the Intel Xeon 6333P at 23823 (0.5% behind), and the AMD Ryzen 7 8840U at 23982 (1.1% behind). These are close scores, indicating the 8540U performs in a tight cluster around the 23,700 mark.

The Core Ultra 5 225T ranks at the 82nd percentile, with an average benchmark score of 30468. Its nearest rivals are the Intel Core i9-11980HK at 30422 (0.2% ahead), the AMD Ryzen 5 7640HS at 30390 (0.3% ahead), the Intel Core i5-13600H at 30548 (0.3% behind), and the AMD Ryzen 7 7736U at 30364 (0.3% ahead). The 225T sits in a similarly tight cluster around the 30,400 mark, but that cluster is roughly 28% higher than the 8540U's cluster.

The data suggests the Core Ultra 5 225T is the pick for users who prioritize raw compute performance in any benchmark category. The Ryzen 5 PRO 8540U is the pick for users who need a 28-watt mobile processor with ECC memory support and a compact FP7 socket design, accepting lower performance in exchange for those platform attributes. The 225T is a desktop part with a 65-watt TDP, so it targets a different physical and thermal environment entirely.

Architecture Differences

The AMD Ryzen 5 PRO 8540U uses the Zen 4 architecture with the Hawk Point codename, part of the 8000 series for mobile. It is built on a 4 nm process at TSMC with 20,900 million transistors on a 137 mm² die. The Intel Core Ultra 5 225T uses the Arrow Lake architecture with the Arrow Lake-S codename, part of Core Ultra Series 2 for desktop. It is built on a 3 nm process at TSMC with 17,800 million transistors on a 243 mm² die.

The core configurations differ substantially. The 8540U has 6 cores and 12 threads, meaning it supports simultaneous multithreading. The 225T has 10 cores and 10 threads, with no multithreading. This means the Intel part has more physical cores but fewer total threads. The 225T compensates with a higher core count and larger caches.

Cache hierarchies diverge significantly. The 8540U provides 64 KB of L1 cache per core, 1 MB of L2 cache per core, and 16 MB of shared L3 cache. The 225T provides 192 KB of L1 per core, 3 MB of L2 per core, and 20 MB of shared L3 cache. The Intel part has three times the L1 per core, three times the L2 per core, and 25% more L3.

Memory support is DDR5 for both, with dual-channel buses. The 8540U has a memory bandwidth of 89.6 GB/s and supports ECC memory. The 225T has a memory bandwidth of 102.4 GB/s and does not support ECC. PCIe connectivity differs: the 8540U uses Gen 4 with 14 lanes (CPU only), while the 225T uses Gen 5 with 20 lanes (CPU only).

Integrated graphics also differ. The 8540U carries a Radeon 740M, while the 225T carries an Arc Xe-LPG Graphics 16EU. The sockets are incompatible: the 8540U uses AMD Socket FP7, and the 225T uses Intel Socket 1851.

Head-to-Head Benchmarks

The Core Ultra 5 225T dominates every recorded benchmark, but the margins vary widely by workload. The smallest edge comes in PassMark integer math, where the 225T scores 59543 against the 8540U's 56738, a 4.7% advantage. This is the closest contest in the entire dataset.

Cinebench tests show a consistent gap. In Cinebench R23 multi-core, the 225T scores 21971 against the 8540U's 15456, a 29.7% lead. In Cinebench R23 single-core, the 225T scores 3101 against 2182, a 29.6% lead. The R20 results mirror this: 9227 versus 6491 multi-core (29.7% ahead) and 1302 versus 916 single-core (29.6% ahead). R15 shows the same pattern: 2214 versus 1557 multi-core (29.7% ahead) and 312 versus 219 single-core (29.8% ahead). The Cinebench deltas cluster tightly between 29.6% and 29.8%, indicating a uniform performance advantage across rendering workloads.

PassMark tests reveal a wider spread. Data encryption shows the 225T at 18289 versus 12319, a 32.6% lead. Extended instructions show 20083 versus 15410, a 23.3% lead. Random string sorting shows 28774 versus 24797, a 13.8% lead. Data compression shows 233998 versus 205703, a 12.1% lead. Multithread overall shows 25358 versus 18218, a 28.2% lead. Single-thread shows 4348 versus 3563, an 18.1% lead.

The largest gaps appear in specialized compute workloads. PassMark find prime numbers shows the 225T at 284 versus the 8540U's 66, a massive 76.8% advantage. PassMark floating-point math shows 82751 versus 34865, a 57.9% lead. PassMark physics shows 2053 versus 983, a 52.1% lead. These three tests are where the Intel part pulls away most decisively.

The 225T also wins PassMark integer math, but only by 4.7%, and data compression by 12.1%. The pattern suggests the Intel part has a particular strength in prime-number finding and floating-point workloads, while the gap narrows in integer-heavy and compression tasks.

FAQ

Q: Which processor has more cores?

A: The Intel Core Ultra 5 225T has 10 cores, while the AMD Ryzen 5 PRO 8540U has 6 cores. However, the 8540U has 12 threads due to multithreading, while the 225T has 10 threads with no multithreading.

Q: Does either processor support ECC memory?

A: Only the AMD Ryzen 5 PRO 8540U supports ECC memory. The Intel Core Ultra 5 225T does not support ECC.

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

A: The largest gap is in PassMark find prime numbers, where the Core Ultra 5 225T scores 284 versus the 8540U's 66, a 76.8% advantage. The smallest gap is in PassMark integer math, at 4.7%.

Q: Which processor has the higher memory bandwidth?

A: The Intel Core Ultra 5 225T has a memory bandwidth of 102.4 GB/s, compared to 89.6 GB/s for the AMD Ryzen 5 PRO 8540U. Both use dual-channel DDR5.

Q: What are the TDP ratings for each processor?

A: The AMD Ryzen 5 PRO 8540U has a 28-watt TDP, making it a low-power mobile part. The Intel Core Ultra 5 225T has a 65-watt TDP, reflecting its desktop orientation.

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

A: The Intel Core Ultra 5 225T records a PassMark single-thread score of 4348, while the AMD Ryzen 5 PRO 8540U records 3563. The Intel part leads by 18.1% in that test.

Where Each One Wins

The Intel Core Ultra 5 225T wins every benchmark category in the database, so the use-case split is not about performance victories. Instead, the distinction comes from platform attributes and workload characteristics.

The 225T is the stronger choice for compute-heavy desktop workloads. Its 10 physical cores and 20 MB of shared L3 cache deliver a 29.7% advantage in Cinebench R23 multi-core rendering. The 57.9% lead in floating-point math and the 76.8% lead in prime-number finding indicate a substantial edge in scientific and mathematical workloads. The 52.1% lead in physics simulation and the 32.6% lead in data encryption further support this. The 225T also provides Gen 5 PCIe with 20 lanes, enabling faster expansion devices, and a higher memory bandwidth of 102.4 GB/s. Its 3 nm process node and 243 mm² die size allow for larger caches per core.

The 8540U is the pick for constrained mobile environments. Its 28-watt TDP fits thin-and-light laptops, and the AMD Socket FP7 platform is designed for portable systems. ECC memory support makes it suitable for error-sensitive workloads where data integrity matters, a feature the 225T lacks. The 8540U also has a smaller die at 137 mm² and fewer transistors at 20,900 million, which correlates with lower power consumption. Its 6-core, 12-thread configuration still provides multithreading, which the 225T does not offer despite having more physical cores.

For users who need a desktop processor with maximum compute throughput across rendering, math, encryption, and physics, the 225T is the clear choice. For users who need a low-power mobile processor with ECC and a compact package, the 8540U serves that role, trading performance for those platform features.

Specification Differences

The two processors differ in every major specification field except for boost clock, memory type, and memory bus. Both have a boost clock of 4.90 GHz and support DDR5 in a dual-channel configuration.

Core count differs: the 8540U has 6 cores, the 225T has 10. Thread count differs: the 8540U has 12 threads, the 225T has 10. Base clock differs: the 8540U runs at 3.20 GHz, the 225T at 2.50 GHz. TDP differs: 28 watts versus 65 watts. Socket differs: AMD Socket FP7 versus Intel Socket 1851.

Architecture and process differ: Zen 4 (Hawk Point) on 4 nm versus Arrow Lake (Arrow Lake-S) on 3 nm. Transistor count differs: 20,900 million versus 17,800 million. Die size differs: 137 mm² versus 243 mm².

Cache differs at every level. L1 is 64 KB per core for the 8540U and 192 KB per core for the 225T. L2 is 1 MB per core for the 8540U and 3 MB per core for the 225T. L3 is 16 MB shared for the 8540U and 20 MB shared for the 225T.

Memory bandwidth differs: 89.6 GB/s versus 102.4 GB/s. ECC support differs: the 8540U supports it, the 225T does not. PCIe differs: Gen 4 with 14 lanes versus Gen 5 with 20 lanes. Integrated graphics differ: Radeon 740M versus Arc Xe-LPG Graphics 16EU. Market segment differs: Mobile versus Desktop. Release dates differ: April 15, 2024 versus December 31, 2024. Neither processor has a launch MSRP in the database, and neither has an unlocked multiplier.