AMD Ryzen 5 8540U vs Intel Core i9-12900HK Comparison

The Verdict

The benchmark data presents a clear split between these two mobile processors. The Intel Core i9-12900HK wins 11 of 15 head-to-head benchmark comparisons, while the AMD Ryzen 5 8540U wins 4. The Intel part dominates multi-threaded workloads by a wide margin, with Cinebench R23 multicore scores 88.1% higher than the AMD chip. The AMD Ryzen 5 8540U, by contrast, takes a narrow lead in single-threaded tests, with Cinebench R23 single-core scores 2.4% higher and PassMark single-thread scores 2% higher.

Buyers who prioritize maximum throughput in rendering, compression, encryption, or physics simulations should choose the Intel Core i9-12900HK. The data shows an overwhelming advantage in every multi-threaded workload recorded. Buyers who value slightly better single-core responsiveness and a more modern process node should consider the AMD Ryzen 5 8540U, which also draws substantially less power at 28 W TDP versus 45 W for the Intel part. The AMD chip is not competitive in multi-threaded tasks, however, and the Intel processor's average benchmark score of 26469 versus 26187 for the AMD chip reflects that overall advantage. Both processors sit at the 78th percentile among all CPUs in the database, meaning they occupy the same tier of overall performance despite their very different workload profiles.

Architecture Differences

The Intel Core i9-12900HK is built on Alder Lake architecture, which uses a hybrid design of 14 cores and 20 threads. It employs a 10 nm process node fabricated by Intel itself, with a die size of 217 mm². The AMD Ryzen 5 8540U uses Zen 4 architecture under the Hawk Point codename, featuring 6 cores and 12 threads on a 4 nm process node from TSMC. The AMD chip packs 20,900 million transistors into a 137 mm² die, a significantly denser design than the Intel part.

Cache configurations differ notably between the two. The Intel processor provides 80 KB of L1 cache per core, 1.25 MB of L2 cache per core, and 24 MB of shared L3 cache. The AMD processor offers 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3 cache. The Intel part therefore has a larger total cache footprint, which contributes to its strong performance in data-heavy workloads like compression and encryption.

Clock speeds tell a nuanced story. The Intel chip has a base clock of 2.50 GHz and a boost clock of 5.00 GHz. The AMD chip starts at 3.20 GHz base and boosts to 4.90 GHz. The AMD chip's higher base clock helps explain its modest single-thread advantage, while the Intel chip's higher boost clock and additional cores drive its multi-threaded dominance.

Memory support differs as well. The Intel processor supports both DDR4 and DDR5 memory in a dual-channel configuration. The AMD processor supports only DDR5 memory, also dual-channel, with a rated memory bandwidth of 89.6 GB/s. The Intel part offers more PCIe lanes, with 20 Gen 4 lanes from the CPU, compared to 14 Gen 4 lanes for the AMD chip.

The integrated graphics solutions also differ. Intel pairs the processor with Iris Xe 96EU graphics, while AMD includes Radeon 740M graphics. The Intel processor has an unlocked multiplier, whereas the AMD processor does not. Release dates place the Intel chip in early January 2022 and the AMD chip in early December 2023, a gap of nearly two years in product generation.

Where Each One Wins

The Intel Core i9-12900HK wins decisively in multi-threaded applications. Cinebench R23 multicore results show an 88.1% lead over the AMD chip, and Cinebench R15 multicore shows a 78.9% lead. PassMark multithread scores favor Intel by 40.2%. In floating-point math, Intel leads by 81.9%, and in integer math, Intel leads by 55%. Physics simulation scores show Intel ahead by 62.7%. The Intel chip also wins in data compression by 41.4%, data encryption by 42.5%, prime number finding by 47.8%, extended instructions by 18%, and random string sorting by 35.3%.

The AMD Ryzen 5 8540U wins in single-threaded tests. Cinebench R15 single-core results show a 4.3% lead for AMD, Cinebench R23 single-core shows a 2.4% lead, and PassMark single-thread shows a 2% lead. These are consistent but modest margins. The AMD chip's higher base clock of 3.20 GHz compared to 2.50 GHz for Intel likely contributes to this pattern.

The workload split is therefore clear. Users running heavily parallel tasks, such as video rendering, 3D modeling, scientific computing, or database operations, will see substantially better performance from the Intel part. Users whose workloads are largely single-threaded, such as older applications, light productivity tasks, or games that rely on one primary thread, will see a small but measurable benefit from the AMD chip. The AMD chip also operates at a lower TDP of 28 W versus 45 W, which may matter for battery life in thin-and-light laptops.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The Intel Core i9-12900HK is substantially faster. It leads by 88.1% in Cinebench R23 multicore and by 78.9% in Cinebench R15 multicore. PassMark multithread scores show a 40.2% advantage for Intel.

Q: Which processor has better single-thread performance?

A: The AMD Ryzen 5 8540U edges out the Intel chip in every recorded single-thread test. Cinebench R15 single-core shows a 4.3% lead, Cinebench R23 single-core shows a 2.4% lead, and PassMark single-thread shows a 2% lead for AMD.

Q: How do the core counts compare?

A: The Intel Core i9-12900HK has 14 cores and 20 threads. The AMD Ryzen 5 8540U has 6 cores and 12 threads. The Intel chip's higher core count is the primary reason for its large multi-threaded advantage.

Q: What process nodes are used?

A: The Intel processor uses a 10 nm node from Intel's own foundry. The AMD processor uses a 4 nm node fabricated by TSMC. The AMD chip also has a smaller die size at 137 mm² versus 217 mm² for Intel.

Q: What memory types do these processors support?

A: The Intel Core i9-12900HK supports both DDR4 and DDR5 memory in dual-channel configuration. The AMD Ryzen 5 8540U supports DDR5 memory only, also in dual-channel, with a rated bandwidth of 89.6 GB/s.

Q: Which processor has more PCIe lanes?

A: The Intel Core i9-12900HK provides 20 Gen 4 lanes from the CPU. The AMD Ryzen 5 8540U provides 14 Gen 4 lanes from the CPU.

Head-to-Head Benchmarks

The largest margin in the entire comparison belongs to Cinebench R23 multicore, where the Intel Core i9-12900HK scores 18288 against 9721.5 for the AMD Ryzen 5 8540U, a difference of 88.1%. This is the single clearest statement of the performance gap between these processors. Cinebench R15 multicore shows a similar pattern, with Intel scoring 2786 versus 1557.5 for AMD, a 78.9% lead.

PassMark floating-point math shows Intel ahead by 81.9%, scoring 63572 versus 34958. This indicates a strong advantage in scientific and numerical workloads. PassMark physics results show Intel leading by 62.7%, with scores of 1673 versus 1028. Integer math favors Intel by 55%, at 89527 versus 57755.

The encryption and compression workloads continue the trend. PassMark data encryption shows Intel at 17445 versus 12245 for AMD, a 42.5% lead. PassMark data compression shows Intel at 294908 versus 208619, a 41.4% lead. PassMark multithread results favor Intel by 40.2%, with scores of 25697 versus 18332. Prime number finding shows Intel ahead by 47.8%, with 102 versus 69. Random string sorting favors Intel by 35.3%, at 32983 versus 24375. Extended instructions show the smallest multi-threaded gap, with Intel leading by 18%, at 17583 versus 14900.

The AMD Ryzen 5 8540U wins all four of its victories in single-threaded measurements. Cinebench R15 single-core shows AMD at 253 versus 242 for Intel, a 4.3% lead. Cinebench R23 single-core shows AMD at 1714.5 versus 1673 for Intel, a 2.4% lead. PassMark single-thread and PassMark singlethread both show AMD at 3639 versus 3567 for Intel, a 2% lead in each case.

The pattern is consistent across every recorded benchmark. When the workload is single-threaded, the AMD chip wins by a small margin. When the workload is multi-threaded, the Intel chip wins by a margin ranging from 18% to 88.1%. The Intel processor also holds a slight edge in average benchmark score, at 26469 versus 26187 for AMD, which places both chips at the 78th percentile among all CPUs in the database.

Specification Differences

The core and thread counts differ substantially. The Intel Core i9-12900HK offers 14 cores and 20 threads, while the AMD Ryzen 5 8540U offers 6 cores and 12 threads. Base clocks differ, with Intel at 2.50 GHz and AMD at 3.20 GHz. Boost clocks are closer, with Intel at 5.00 GHz and AMD at 4.90 GHz. TDP ratings show Intel at 45 W and AMD at 28 W, a significant difference for mobile thermal management.

The process nodes reflect different manufacturing generations. Intel uses a 10 nm process from its own foundry, while AMD uses a 4 nm process from TSMC. The AMD chip has a smaller die at 137 mm² and a transistor count of 20,900 million, while the Intel chip has a die size of 217 mm² with no transistor count recorded in the database.

Cache hierarchies differ at every level. The Intel chip provides 80 KB of L1 per core, 1.25 MB of L2 per core, and 24 MB of shared L3. The AMD chip provides 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. Memory support differs, with Intel supporting DDR4 and DDR5 while AMD supports DDR5 only. The AMD chip has a recorded memory bandwidth of 89.6 GB/s, while no such figure is recorded for the Intel chip.

PCIe lane counts differ, with Intel offering 20 Gen 4 lanes and AMD offering 14 Gen 4 lanes. The sockets are different, with Intel using BGA 1744 and AMD using Socket FP7. Integrated graphics differ, with Intel using Iris Xe 96EU and AMD using Radeon 740M. The Intel multiplier is unlocked while the AMD multiplier is locked. Release dates show Intel launching in January 2022 and AMD in December 2023. Part numbers are recorded as SRLD3 for Intel and 100-000001326(FP7r2)100-000001333(FP7) for AMD.