Intel Core i9-13900KS vs Intel Core Ultra 7 270HX Plus Comparison

Where Each One Wins

The Intel Core i9-13900KS is the clear winner for heavily threaded workloads and general productivity, taking 12 of the 17 head-to-head benchmark comparisons. Its largest advantages come in integer math, where it scores 211027 against the Ultra 7's 122449, a 72.3% lead, and in data compression, where it posts 814838 versus 493179, a 65.2% advantage. These results point to a processor that dominates CPU-intensive tasks like compilation, rendering, and archive handling.

The Intel Core Ultra 7 270HX Plus wins 5 benchmarks, but they are concentrated in specific niches. Its most striking victory is in prime number finding, scoring 482 versus 257, which gives it a 46.7% margin. It also edges ahead in floating point math (163567 to 154805, a 5.4% lead) and physics simulations (3843 to 3441, a 10.5% lead). The Ultra 7 also takes a narrow single-thread win in PassMark, 4764 to 4712, a 1.1% difference.

The benchmark split tells a clear story. The 13900KS excels at workloads that scale with core count and raw integer throughput, while the 270HX Plus shows strength in specialized math operations and physics processing. For a user deciding between them, the choice depends on whether the primary workload resembles integer-heavy productivity or specialized computational tasks.

Architecture Differences

The two processors come from different design philosophies. The 13900KS uses Raptor Lake architecture on a 10 nm process from Intel, while the 270HX Plus uses Arrow Lake-HX Refresh architecture on a 3 nm process from TSMC. The process node difference is significant, as the 3 nm node allows the mobile chip to pack 17,800 million transistors into a 243 mm² die, while the desktop chip uses a 257 mm² die with no transistor count listed in the database.

Core configurations differ substantially. The 13900KS has 24 cores and 32 threads, while the 270HX Plus has 20 cores and 20 threads. This means the desktop chip supports hyperthreading, while the mobile chip does not, which partially explains the multithreaded benchmark gap. Cache hierarchies also diverge. The 13900KS has 80 KB of L1 per core, 2 MB of L2 per core, and 36 MB of shared L3. The 270HX Plus has larger per-core caches, with 192 KB of L1 and 3 MB of L2, but less shared L3 at 30 MB.

Memory support differs as well. The 13900KS supports both DDR4 and DDR5 with dual-channel memory and 89.6 GB/s bandwidth. The 270HX Plus supports only DDR5, also dual-channel, but with higher bandwidth at 102.4 GB/s. The desktop chip supports ECC memory, while the mobile chip does not. Both use PCIe Gen 5 with 20 CPU lanes, but the 13900KS uses Intel Socket 1700, while the 270HX Plus uses Intel BGA 2114. The integrated graphics differ, with the 13900KS featuring UHD Graphics 770 and the 270HX Plus featuring Arc Xe-LPG Graphics 64EU.

FAQ

Q: Which processor has more cores?

A: The Intel Core i9-13900KS has 24 cores and 32 threads, while the Intel Core Ultra 7 270HX Plus has 20 cores and 20 threads.

Q: Which chip offers higher boost clock speed?

A: The 13900KS boosts to 6.00 GHz, while the 270HX Plus boosts to 5.30 GHz.

Q: What is the average benchmark score difference between the two?

A: The 13900KS has an average benchmark score of 64051, and the 270HX Plus has an average score of 61834, putting the desktop chip ahead by roughly 3.5%.

Q: Does the Ultra 7 support ECC memory?

A: No, the 270HX Plus does not support ECC memory, while the 13900KS does.

Q: Which processor has higher memory bandwidth?

A: The 270HX Plus has higher memory bandwidth at 102.4 GB/s, compared to 89.6 GB/s for the 13900KS, though both use dual-channel memory.

Q: Are both processors unlocked for overclocking?

A: Yes, both the 13900KS and the 270HX Plus have an unlocked multiplier.

Specification Differences

| Specification | Intel Core i9-13900KS | Intel Core Ultra 7 270HX Plus |

|---------------|----------------------|------------------------------|

| Cores | 24 | 20 |

| Threads | 32 | 20 |

| Base Clock | 3.20 GHz | 2.40 GHz |

| Boost Clock | 6.00 GHz | 5.30 GHz |

| TDP | 150 W | 55 W |

| Socket | Intel Socket 1700 | Intel BGA 2114 |

| Architecture | Raptor Lake | Arrow Lake-HX Refresh |

| Process Node | 10 nm | 3 nm |

| Foundry | Intel | TSMC |

| Transistors | Not listed | 17,800 million |

| Die Size | 257 mm² | 243 mm² |

| L1 Cache | 80 KB (per core) | 192 KB (per core) |

| L2 Cache | 2 MB (per core) | 3 MB (per core) |

| L3 Cache | 36 MB (shared) | 30 MB (shared) |

| Memory Support | DDR4, DDR5 | DDR5 |

| Memory Bandwidth | 89.6 GB/s | 102.4 GB/s |

| ECC Memory | Yes | No |

| Integrated Graphics | UHD Graphics 770 | Arc Xe-LPG Graphics 64EU |

| Market Segment | Desktop | Mobile |

| Launch MSRP | $699 | Not listed |

| Release Date | 2023-01-11 | 2026-03-16 |

Head-to-Head Benchmarks

The Cinebench suite shows a consistent pattern. In Cinebench R23 multi-core, the 13900KS scores 51368 against the 270HX Plus's 41913, a 22.6% lead. Single-core R23 also favors the desktop chip, 7252 to 5917, another 22.6% margin. The same gap appears in R20 multi-core (21574 to 17603) and R20 single-core (3045 to 2485), both at 22.5% to 22.6%. R15 tells the same story, with the 13900KS ahead by 22.6% in multi-core and 22.5% in single-core.

PassMark results reveal where the desktop chip truly separates itself. Integer math shows a 72.3% advantage for the 13900KS, the largest margin in any benchmark. Data compression follows at 65.2%, and random string sorting at 50.4%. Data encryption shows a 26.3% lead, and extended instructions a 22.7% lead. Multithread overall lands at 25.6% in favor of the 13900KS.

The 270HX Plus wins are smaller in magnitude but notable in their categories. Prime number finding is its best result, 482 to 257, a 46.7% margin in its favor. Physics simulation shows a 10.5% advantage, and floating point math a 5.4% advantage. The single-thread PassMark results are nearly tied, with the Ultra 7 ahead by just 1.1%.

The data suggests the 13900KS dominates in any workload that stresses the CPU across all threads, particularly integer operations. The 270HX Plus shows targeted strengths in mathematical workloads, especially prime number generation and physics, where its architecture appears more efficient per unit of work.

The Verdict

The Intel Core i9-13900KS is the pick for users who need maximum multi-threaded throughput. Its 22.6% lead across all Cinebench multi-core tests, combined with a 72.3% advantage in integer math and a 65.2% edge in data compression, makes it the stronger choice for rendering, compiling, and data-heavy workloads. Its 24 cores and 32 threads, boosted by a 6.00 GHz clock, deliver results that the mobile chip cannot match in these areas. The desktop chip also holds a 93rd percentile ranking among all CPUs, same as the mobile chip, but with a higher average benchmark score of 64051.

The Intel Core Ultra 7 270HX Plus has a role for specific computational tasks. Its 46.7% win in prime number finding and 10.5% win in physics suggest it handles certain mathematical workloads with greater efficiency. Its 5.4% lead in floating point math and 1.1% lead in single-thread PassMark indicate competitive performance in lighter tasks. The mobile form factor, with a 55 W TDP versus 150 W for the desktop chip, also makes it suitable for systems where power draw is a consideration.

Users should choose the 13900KS for any workload that scales with core count and integer performance. Users should choose the 270HX Plus for specialized math-heavy tasks or for a mobile platform with strong per-core efficiency. The data does not support a single winner across all categories, but it does show a clear division: raw throughput belongs to the desktop chip, while niche computational efficiency belongs to the mobile chip.