AMD Ryzen 9 7940HX vs Intel Core Ultra 7 265KF Comparison

The Intel Core Ultra 7 265KF and the AMD Ryzen 9 7940HX are two high-performance processors from different market segments, yet they end up in direct competition for certain workloads. The data shows a clear split in their strengths: the Intel chip dominates in most compute-heavy tasks, while the AMD chip holds specific advantages in memory-intensive and integer workloads. This analysis walks through the benchmark results to see where each processor excels, how their architectures differ, and who should choose which.

Where Each One Wins

The benchmark results paint a clear picture of two distinct performance profiles. The Intel Core Ultra 7 265KF wins 10 out of 13 head-to-head comparisons, establishing itself as the overall performance leader. Its victories are decisive in heavily threaded and floating-point workloads. For example, it delivers a 69.2% higher score in Cinebench R23 multi-core and a 56.1% higher score in PassMark floating-point math. The Intel chip also shows a massive advantage in single-core performance, leading by 288.5% in Cinebench R23 single-core, which is the largest delta observed in the entire dataset.

The AMD Ryzen 9 7940HX, despite losing the majority of tests, secures three wins in specific areas. Its most significant victory comes in PassMark integer math, where it scores 202,883 compared to Intel's 143,351, a 29.3% advantage. This suggests the Zen 4 architecture handles integer-heavy calculations more efficiently. The AMD chip also wins in PassMark data compression (693,741 vs 666,589, a 3.9% edge) and random string sorting (81,775 vs 79,735, a 2.5% edge). These three wins cluster around memory-access-heavy and data-manipulation tasks, indicating the AMD chip's larger L3 cache benefits these workloads.

The overall average benchmark scores reflect this split. The Intel part averages 71,910 across all benchmarks, placing it 0.2% above the AMD Ryzen 7 8840HX and 0.8% above the Intel Xeon Platinum 8270. The AMD part averages 69,875, landing 0.5% above the AMD Ryzen 9 7950X and 0.7% above the Intel Core i7-14700K. Both processors sit at the 94th percentile among all CPUs, indicating they are both top-tier parts overall.

Architecture Differences

The two processors come from fundamentally different design philosophies. The Intel Core Ultra 7 265KF uses the Arrow Lake architecture, built on a 3 nm process node from TSMC. It packs 20 cores and 20 threads, meaning it has no simultaneous multithreading. The chip includes 17,800 million transistors on a 243 mm² die. Its cache hierarchy consists of 192 KB of L1 per core, 3 MB of L2 per core, and 30 MB of shared L3 cache. The Intel chip runs on a base clock of 3.90 GHz with a boost clock of 5.50 GHz, and it has a TDP of 125 W.

The AMD Ryzen 9 7940HX uses the Zen 4 architecture, built on a 5 nm process node, also from TSMC. It has 16 cores and 32 threads, with simultaneous multithreading enabled. The chip contains 13,140 million transistors spread across two 71 mm² dies. Its cache configuration features 64 KB of L1 per core, 1 MB of L2 per core, and a much larger 64 MB of shared L3 cache. The AMD chip runs at a lower 2.40 GHz base clock but boosts to 5.20 GHz. Its TDP is significantly lower at 55 W, reflecting its mobile market segment.

The Intel processor is a desktop part with a launch MSRP of $379, while the AMD processor is a mobile part. The Intel chip uses the Intel Socket 1851, while the AMD chip uses the AMD Socket FL1. Both support DDR5 memory and have dual-channel memory buses, but the Intel chip has a higher memory bandwidth at 102.4 GB/s compared to the AMD chip's 83.2 GB/s. The AMD chip has more PCIe lanes (28 Gen 5 lanes) than the Intel chip (20 Gen 5 lanes). The AMD chip also includes integrated Radeon 610M graphics, while the Intel chip has no integrated graphics.

The Verdict

The data supports a clear recommendation based on workload priorities. For users seeking maximum raw compute performance, particularly in floating-point math, physics simulations, and single-threaded tasks, the Intel Core Ultra 7 265KF is the superior choice. Its Cinebench R23 multi-core score of 49,736 versus the AMD's 29,400 represents a 69.2% advantage that will translate to faster rendering and video encoding. The 25% lead in PassMark single-thread (4,928 vs 3,942) makes it the better option for applications that rely on per-core performance.

However, the AMD Ryzen 9 7940HX wins in integer math by 29.3% and in data compression by 3.9%. These results indicate the AMD chip handles certain data-processing workloads more efficiently, likely due to its larger 64 MB L3 cache. Users running database operations, compression algorithms, or other integer-heavy tasks may find the AMD chip delivers better performance despite its lower overall benchmark average.

The final choice depends on the specific workload mix. The Intel chip is the better all-rounder, winning 10 of 13 tests. The AMD chip is a specialist, winning only 3 tests but doing so in meaningful categories. For a balanced workload, the Intel part is the safer pick. For integer-processing-heavy environments, the AMD part holds a measurable edge. Both sit at the 94th percentile, so neither is a weak choice.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core Ultra 7 265KF has 20 cores and 20 threads, while the AMD Ryzen 9 7940HX has 16 cores and 32 threads. The AMD chip has fewer cores but more threads due to simultaneous multithreading.

Q: What is the single-core performance difference?

A: The Intel chip leads significantly in single-core performance. In Cinebench R23 single-core, the Intel scores 7,021 versus the AMD's 1,807, a 288.5% advantage. In PassMark single-thread, the Intel scores 4,928 versus 3,942, a 25% lead.

Q: Which processor has a larger L3 cache?

A: The AMD Ryzen 9 7940HX has a 64 MB shared L3 cache, while the Intel Core Ultra 7 265KF has a 30 MB shared L3 cache. The AMD chip's larger cache likely contributes to its wins in data compression and integer math.

Q: What is the TDP difference between the two?

A: The Intel Core Ultra 7 265KF has a TDP of 125 W, while the AMD Ryzen 9 7940HX has a TDP of 55 W. This reflects the Intel chip's desktop design versus the AMD chip's mobile design.

Q: Does the AMD chip have integrated graphics?

A: Yes, the AMD Ryzen 9 7940HX includes Radeon 610M integrated graphics. The Intel Core Ultra 7 265KF has no integrated graphics.

Q: Which processor wins in PassMark multithread?

A: The Intel Core Ultra 7 265KF wins with a score of 58,518, which is 10% higher than the AMD Ryzen 9 7940HX's score of 53,204.

Head-to-Head Benchmarks

The most significant Intel victories are concentrated in compute-heavy synthetic tests. In Cinebench R23 multi-core, the Intel chip scores 49,736 against the AMD's 29,400, a 69.2% advantage that underscores the Intel chip's higher core count and clock speeds. The single-core Cinebench R23 result is even more lopsided: 7,021 versus 1,807, a 288.5% delta. This massive gap suggests the Intel chip's 5.50 GHz boost clock provides a substantial per-thread advantage over the AMD chip's 5.20 GHz boost.

In PassMark physics, the Intel chip scores 3,633 versus 2,297, a 58.2% lead. Floating-point math shows a 56.1% advantage (189,431 vs 121,383). Find prime numbers yields a 78% lead (486 vs 273). Data encryption shows a 14.8% advantage (48,198 vs 41,974). Extended instructions are 6.8% faster (54,513 vs 51,029). PassMark multithread shows a 10% lead (58,518 vs 53,204). These results show the Intel chip's consistent domination across floating-point, physics, and encryption workloads.

The AMD chip's victories are narrower but notable. The largest win is in integer math, where it scores 202,883 versus 143,351, a 29.3% advantage. Data compression shows a 3.9% edge (693,741 vs 666,589). Random string sorting shows a 2.5% edge (81,775 vs 79,735). These three wins all involve heavy memory access patterns, suggesting the AMD chip's larger 64 MB L3 cache provides a real benefit for data-intensive tasks.

Specification Differences

The core specifications differ significantly between the two parts. The Intel chip has 20 cores and 20 threads, while the AMD chip has 16 cores and 32 threads. The Intel chip has a base clock of 3.90 GHz and a boost clock of 5.50 GHz, while the AMD chip has a base clock of 2.40 GHz and a boost clock of 5.20 GHz. The TDP is 125 W for Intel and 55 W for AMD.

The process node differs: the Intel chip uses 3 nm, while the AMD chip uses 5 nm. The Intel chip has 17,800 million transistors on a 243 mm² die, while the AMD chip has 13,140 million transistors on two 71 mm² dies. The cache hierarchy differs in both L1 and L2 sizes: the Intel chip has 192 KB of L1 and 3 MB of L2 per core, while the AMD chip has 64 KB of L1 and 1 MB of L2 per core. The L3 cache is 30 MB shared for Intel and 64 MB for AMD.

Memory bandwidth differs, with the Intel chip supporting 102.4 GB/s versus the AMD chip's 83.2 GB/s. The PCIe lane counts differ as well: the Intel chip has 20 Gen 5 lanes, while the AMD chip has 28 Gen 5 lanes. The Intel chip has no integrated graphics, while the AMD chip includes Radeon 610M. The socket and market segment differ: the Intel chip uses Socket 1851 and targets desktops, while the AMD chip uses Socket FL1 and targets mobile systems. Both have unlocked multipliers, and neither supports ECC memory.