AMD Ryzen 5 PRO 8540U vs Intel Core Ultra 7 266V Comparison

The AMD Ryzen 5 PRO 8540U and Intel Core Ultra 7 266V are both mobile processors aimed at thin-and-light laptops, yet they take fundamentally different approaches to delivering performance. The AMD chip is a 6-core, 12-thread Zen 4 part built on a 4nm process, while the Intel chip is an 8-core, 8-thread Lunar Lake part built on a 3nm process. Benchmark results show a clear split: the Intel processor wins 14 of 17 head-to-head tests, but the AMD processor secures decisive victories in integer math, data compression, and random string sorting. This creates an interesting dynamic where the overall performance leader is not the outright winner in every workload category.

FAQ

Q: Which processor has the higher boost clock?

A: The Intel Core Ultra 7 266V has a boost clock of 5.00 GHz, which is slightly higher than the AMD Ryzen 5 PRO 8540U's 4.90 GHz boost clock.

Q: How do the core and thread counts compare between the two?

A: The AMD Ryzen 5 PRO 8540U has 6 cores and 12 threads, while the Intel Core Ultra 7 266V has 8 cores and 8 threads. This means AMD uses simultaneous multithreading (SMT) while Intel does not.

Q: What is the difference in memory bandwidth?

A: The Intel Core Ultra 7 266V has a memory bandwidth of 136.5 GB/s, which is significantly higher than the AMD Ryzen 5 PRO 8540U's 89.6 GB/s.

Q: Which processor supports ECC memory?

A: The AMD Ryzen 5 PRO 8540U supports ECC memory, while the Intel Core Ultra 7 266V does not.

Q: What is the process node difference between the two chips?

A: The Intel Core Ultra 7 266V is built on a 3nm process, while the AMD Ryzen 5 PRO 8540U uses a 4nm process. Both are manufactured by TSMC.

Q: How does the integrated graphics compare?

A: The AMD Ryzen 5 PRO 8540U features a Radeon 740M, while the Intel Core Ultra 7 266V features an Arc 140V. The data does not include graphics benchmarks for either.

Where Each One Wins

The Intel Core Ultra 7 266V is the clear winner in raw compute throughput and single-threaded performance. It takes the top spot in every Cinebench test, both multicore and singlecore, with margins consistently around 6.5-6.8%. The Intel chip also dominates in floating-point math, scoring 56,923 versus AMD's 34,865, a massive 38.8% advantage. Physics simulations also favor Intel heavily, with a 38.9% lead (1,608 vs 983). For tasks like prime number finding, the Intel chip is in another league entirely, scoring 191 versus AMD's 66.

The AMD Ryzen 5 PRO 8540U fights back in integer-heavy workloads. It wins integer math by a commanding 36.5% margin (56,738 vs 41,558), which suggests its 12 threads and larger L3 cache help in certain computational patterns. Data compression is also an AMD win, with a 10% advantage (205,703 vs 187,050). Random string sorting goes to AMD by 8.3% (24,797 vs 22,905). These three wins indicate that AMD's architecture handles data organization and transformation tasks more efficiently, even if it loses in raw arithmetic throughput.

Architecture Differences

The two processors represent distinct design philosophies. The AMD Ryzen 5 PRO 8540U uses Zen 4 architecture on a 4nm process, codenamed Hawk Point, with a die size of 137 mm² and 20,900 million transistors. It has 6 cores and 12 threads, relying on simultaneous multithreading to extract more work from each core. The cache hierarchy uses 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. This is a traditional layout designed for balanced performance across many workload types.

The Intel Core Ultra 7 266V uses the Lunar Lake architecture on a 3nm process, with 8 cores and 8 threads. It abandons SMT entirely, betting instead on wider cores and higher frequencies. The cache structure is notably different: 192 KB of L1 per core, 2.5 MB of L2 per core, and 12 MB of shared L3. The larger L1 and L2 caches per core suggest Intel is prioritizing low-latency data access for each individual core. The transistor count and die size for the Intel chip are not listed in the data.

Memory support diverges significantly. The AMD chip uses DDR5 with dual-channel memory and 89.6 GB/s bandwidth, plus ECC support. The Intel chip uses LPDDR5X with dual-channel memory and 136.5 GB/s bandwidth, but no ECC. The higher memory bandwidth on Intel likely contributes to its strong floating-point performance. PCIe connectivity also differs: AMD offers Gen 4 with 14 lanes, while Intel offers Gen 5 with only 4 lanes. This suggests Intel prioritizes a few high-speed connections rather than many moderate-speed ones.

Specification Differences

The core and thread counts differ: AMD has 6 cores/12 threads versus Intel's 8 cores/8 threads. Base clocks are 3.20 GHz for AMD and 2.20 GHz for Intel, while boost clocks are 4.90 GHz and 5.00 GHz respectively. The TDP is a major differentiator, with AMD rated at 28W and Intel at 17W, indicating Intel aims for better efficiency in constrained thermal envelopes.

Cache configurations are distinct: AMD uses 64 KB L1 per core, 1 MB L2 per core, and 16 MB shared L3; Intel uses 192 KB L1 per core, 2.5 MB L2 per core, and 12 MB shared L3. Memory bandwidth favors Intel at 136.5 GB/s versus AMD's 89.6 GB/s. ECC memory support is present on AMD but absent on Intel. PCIe generations and lane counts differ (Gen 4 with 14 lanes for AMD, Gen 5 with 4 lanes for Intel). The process node and foundry are similar in that both use TSMC, but Intel's 3nm process is smaller than AMD's 4nm. The integrated GPUs are different models: Radeon 740M for AMD and Arc 140V for Intel.

Head-to-Head Benchmarks

The Intel Core Ultra 7 266V wins all six Cinebench tests by consistent margins. In Cinebench R23 multicore, Intel scores 16,544 against AMD's 15,456, a 6.6% advantage. The singlecore R23 result shows Intel at 2,335 versus AMD's 2,182, also a 6.6% lead. The pattern holds across R15 and R20, with Intel leading by 6.5-6.8% in every instance. This consistency suggests a fundamental per-core advantage rather than a workload-specific quirk.

PassMark results tell a more nuanced story. The Intel chip wins passmark single-thread by 9.6% (3,943 vs 3,563), which aligns with its Cinebench singlecore wins. It also dominates floating-point math (56,923 vs 34,865), physics (1,608 vs 983), and prime number finding (191 vs 66). The extended instructions test is close, with Intel leading 15,928 vs 15,410, a modest 3.3% margin. Data encryption favors Intel by 10.9% (13,822 vs 12,319).

AMD's wins are concentrated but substantial. Integer math is AMD's largest victory, scoring 56,738 versus Intel's 41,558, a 36.5% advantage. This is a remarkable reversal given Intel's dominance elsewhere. Data compression goes to AMD by 10% (205,703 vs 187,050), and random string sorting is an AMD win by 8.3% (24,797 vs 22,905). The multithread passmark score favors Intel by 6.4% (19,461 vs 18,218), which tracks with the Cinebench multicore results.

The Verdict

The Intel Core Ultra 7 266V is the stronger all-around performer. It wins 14 of 17 head-to-head benchmarks, including every Cinebench test, all single-threaded tests, and most math and encryption workloads. Its 3nm process and 17W TDP suggest it can deliver this performance in a more power-efficient package. Users who prioritize floating-point math, physics simulations, or single-threaded responsiveness should choose the Intel chip based on the data.

The AMD Ryzen 5 PRO 8540U is the better choice for specific integer-heavy workloads. Its 36.5% win in integer math and 10% win in data compression indicate that its 12 threads and larger L3 cache provide genuine advantages for data processing and transformation tasks. The ECC memory support is also a differentiator for reliability-sensitive applications. Users who need those specific capabilities, or who value ECC, should select the AMD processor.

The overall benchmark averages are nearly identical: AMD scores 23,709 versus Intel's 23,297, a difference of about 1.7%. Both processors sit at the 76th percentile of all CPUs, cementing them as comparable mid-range mobile parts. The choice ultimately comes down to workload mix: Intel for general compute and arithmetic performance, AMD for integer processing and data manipulation.