AMD Ryzen 9 6900HX vs Intel Core i9-12900HK Comparison

The benchmark data presents a clear split between the Intel Core i9-12900HK and the AMD Ryzen 9 6900HX, with the Intel part winning 15 of the 21 head-to-head comparisons. The Intel chip’s advantage is most pronounced in multi-core rendering and physics workloads, while the AMD chip counters with wins in data compression, encryption, and certain threaded 3DMark tests. Both processors sit at the 78th percentile among all CPUs, and their average benchmark scores are nearly identical — 26469 for the Intel versus 26274 for the AMD — which makes the per-test deltas all the more telling about their distinct architectural personalities.

The Verdict

The Intel Core i9-12900HK is the clear choice for users whose workloads scale with raw core count and thread count. Its 14 cores and 20 threads deliver a 35.5% lead in Cinebench R23 multi-core (18288 vs 13497), a 24.9% edge in Cinebench R15 multi-core (2786 vs 2231), and a 45.1% advantage in PassMark physics (1673 vs 1153). The data suggests this is the processor for 3D rendering, video encoding, and any heavily parallel compute task.

The AMD Ryzen 9 6900HX, despite having fewer cores (8 vs 14) and threads (16 vs 20), wins in several specific workloads that hint at superior per-core efficiency in certain instruction paths. It leads in 3DMark 16-thread (6745 vs 6441, a 4.5% margin), 3DMark 8-thread (5607 vs 5172, a 7.8% margin), and PassMark data compression (306184 vs 294908). The AMD part also dominates in PassMark extended instructions (20849 vs 17583, a 15.7% lead) and data encryption (19118 vs 17445, an 8.8% lead).

For a user deciding between these two, the verdict hinges on workload type. The Intel chip is the multi-core brute-force winner. The AMD chip is the efficiency specialist, particularly in encryption and compression tasks where its Zen 3+ architecture appears to process data more effectively per thread. The 3DMark 16-thread result is the outlier that complicates the narrative — AMD wins there despite losing the overall multi-core battle.

Architecture Differences

The architectural split between these two mobile processors is fundamental. The Intel Core i9-12900HK uses Alder Lake-H architecture built on Intel’s 10 nm process, while the AMD Ryzen 9 6900HX uses Zen 3+ (Rembrandt) built on TSMC’s 6 nm node. The process node difference — 10 nm versus 6 nm — is significant, yet the die sizes are nearly identical: 217 mm² for Intel versus 208 mm² for AMD.

Core counts diverge sharply. Intel packs 14 cores and 20 threads, while AMD offers 8 cores and 16 threads. The cache hierarchy tells a similar story: Intel provides 80 KB of L1 per core, 1.25 MB of L2 per core, and 24 MB of shared L3. AMD counters with 64 KB of L1 per core, 512 KB of L2 per core, and 16 MB of shared L3. Intel’s larger caches, particularly the 24 MB L3 versus AMD’s 16 MB, likely contribute to its multi-core dominance.

Memory support differs. Intel supports both DDR4 and DDR5, while AMD supports only DDR5. Both use dual-channel memory buses, but AMD lists a memory bandwidth of 76.8 GB/s while Intel does not specify one in the data. Both offer Gen 4 PCIe with 20 lanes from the CPU. Integrated graphics also differ: Intel uses Iris Xe with 96 execution units, AMD uses Radeon 680M. Both processors have unlocked multipliers.

The socket and foundry are entirely different: Intel uses BGA 1744 and its own foundry, AMD uses AMD Socket FP7 and TSMC. Base clocks differ (2.50 GHz for Intel, 3.30 GHz for AMD), as do boost clocks (5.00 GHz for Intel, 4.90 GHz for AMD). AMD’s higher base clock does not translate into single-thread supremacy, which suggests Intel’s boost behavior is more aggressive.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core i9-12900HK has 14 cores and 20 threads, while the AMD Ryzen 9 6900HX has 8 cores and 16 threads. This core advantage is the primary driver of Intel’s multi-core benchmark wins.

Q: Does the AMD chip win any multi-core benchmarks?

A: Yes. The AMD Ryzen 9 6900HX wins 3DMark 16-thread (6745 vs 6441, a 4.5% lead) and 3DMark 8-thread (5607 vs 5172, a 7.8% lead). These wins occur despite AMD’s lower core count, suggesting the Zen 3+ architecture manages thread scaling more efficiently in these specific tests.

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

A: The Intel Core i9-12900HK wins 3DMark single-thread (1025 vs 912, a 12.4% lead) and Cinebench R23 single-core (1673 vs 1558, a 7.4% lead). The AMD chip wins Cinebench R15 single-core (249 vs 242, a 2.8% lead), but the Intel chip’s larger margins in the other single-thread tests give it the overall edge.

Q: How do the integrated graphics compare?

A: The Intel Core i9-12900HK features Iris Xe with 96 execution units, while the AMD Ryzen 9 6900HX features Radeon 680M. The data does not include integrated graphics benchmarks, so a performance comparison cannot be made from this dataset.

Q: What is the memory bandwidth difference?

A: The AMD Ryzen 9 6900HX lists a memory bandwidth of 76.8 GB/s, while the Intel Core i9-12900HK does not have a memory bandwidth figure in the data. Intel supports both DDR4 and DDR5 memory, while AMD supports only DDR5.

Q: Which processor has the larger L3 cache?

A: The Intel Core i9-12900HK has 24 MB of shared L3 cache, while the AMD Ryzen 9 6900HX has 16 MB of shared L3 cache. Intel also has larger per-core L1 (80 KB vs 64 KB) and L2 (1.25 MB vs 512 KB) caches.

Specification Differences

The two processors differ across nearly every specification category. Core count: Intel has 14, AMD has 8. Threads: Intel has 20, AMD has 16. Base clock: Intel runs at 2.50 GHz, AMD at 3.30 GHz. Boost clock: Intel reaches 5.00 GHz, AMD reaches 4.90 GHz. Process node: Intel uses 10 nm, AMD uses 6 nm. Foundry: Intel uses its own, AMD uses TSMC.

Cache sizes diverge at every level. L1 per core: 80 KB for Intel, 64 KB for AMD. L2 per core: 1.25 MB for Intel, 512 KB for AMD. L3 shared: 24 MB for Intel, 16 MB for AMD. Memory support: Intel offers DDR4 and DDR5, AMD only DDR5. Memory bandwidth: AMD lists 76.8 GB/s, Intel lists none.

Die size is close but not equal: 217 mm² for Intel, 208 mm² for AMD. Socket and part number differ: Intel uses BGA 1744 with part number SRLD3, AMD uses Socket FP7 with part number 100-000000544100-000000560. Integrated graphics: Intel has Iris Xe 96EU, AMD has Radeon 680M. Both have 45 W TDP, dual-channel memory, Gen 4 PCIe with 20 lanes, no ECC memory, unlocked multipliers, and mobile market segment.

Head-to-Head Benchmarks

The biggest Intel win comes in Cinebench R23 multi-core, where the 12900HK scores 18288 against the 6900HX’s 13497, a 35.5% margin. PassMark find prime numbers shows an even larger relative gap: Intel scores 102, AMD scores 63, a 61.9% difference. PassMark physics also favors Intel heavily: 1673 vs 1153, a 45.1% lead. Cinebench R15 multi-core gives Intel a 24.9% edge (2786 vs 2231), and PassMark floating point math adds another 27.2% win (63572 vs 49981).

Intel also wins several smaller margins: 3DMark single-thread by 12.4% (1025 vs 912), Cinebench R23 single-core by 7.4% (1673 vs 1558), PassMark multithread by 5.5% (25697 vs 24346), 3DMark 4-thread by 5.5% (3537 vs 3353), PassMark single-thread by 4.6% (3567 vs 3409), PassMark random string sorting by 3% (32983 vs 32037), 3DMark max-thread by 1.7% (6829 vs 6717), and PassMark integer math by 0.2% (89527 vs 89388).

The AMD wins are fewer but notable. PassMark extended instructions gives AMD its largest win: 20849 vs 17583, a 15.7% lead. PassMark data encryption favors AMD by 8.8% (19118 vs 17445). 3DMark 8-thread goes to AMD by 7.8% (5607 vs 5172). 3DMark 16-thread favors AMD by 4.5% (6745 vs 6441). PassMark data compression goes to AMD by 3.7% (306184 vs 294908). Cinebench R15 single-core is AMD’s narrowest win: 249 vs 242, a 2.8% margin.

Where Each One Wins

The Intel Core i9-12900HK wins in rendering and compute-heavy tasks. Cinebench R23 multi-core, Cinebench R15 multi-core, PassMark floating point math, and PassMark physics all show Intel with double-digit percentage leads. The 12900HK also wins in single-thread workloads like 3DMark single-thread and Cinebench R23 single-core, making it the stronger choice for applications that mix high-frequency single-core performance with multi-core rendering.

The AMD Ryzen 9 6900HX wins in data-centric and encryption workloads. PassMark extended instructions, data encryption, and data compression all favor AMD, with the extended instructions lead reaching 15.7%. The 6900HX also wins 3DMark 8-thread and 16-thread tests, which suggests its thread scheduling works better in certain gaming or simulation scenarios despite lower core counts.

The overall benchmark count favors Intel 15 wins to 6. But the AMD wins cluster in specific, repeatable categories — encryption, compression, and extended instructions — which indicates a genuine architectural strength rather than noise. The data implies that for users handling encrypted data, compressed archives, or SIMD-heavy code, the AMD chip may deliver better real-world performance. For everything else, Intel’s core advantage dominates the scoreboard.