Intel Core i5-14400T vs Intel Core i9-11900K Comparison

FAQ

Q: Which processor has more physical cores, the Intel Core i5-14400T or the Intel Core i9-11900K?

A: The Intel Core i5-14400T has 10 cores, while the Intel Core i9-11900K has 8 cores. Both processors support 16 threads.

Q: How do the two CPUs compare in single-threaded PassMark performance?

A: The scores are nearly identical. The Intel Core i5-14400T scores 3512 in PassMark single-thread, and the Intel Core i9-11900K scores 3511. The data records a delta of 0 percent, with the i5-14400T marked as the winner by a single point.

Q: Which processor delivers a higher Cinebench R23 multi-core score?

A: The Intel Core i9-11900K leads with a score of 21168, compared to 17189 for the Intel Core i5-14400T. This represents an 18.8 percent advantage for the i9-11900K in this test.

Q: What is the difference in power consumption between the two chips?

A: The Intel Core i5-14400T has a TDP of 35 watts, while the Intel Core i9-11900K has a TDP of 125 watts, a significant gap in thermal design power.

Q: Do both processors support DDR5 memory?

A: No. The Intel Core i5-14400T supports both DDR4 and DDR5 memory, while the Intel Core i9-11900K supports only DDR4 memory.

Q: Which CPU has a higher boost clock speed?

A: The Intel Core i9-11900K boosts up to 5.30 GHz, whereas the Intel Core i5-14400T boosts up to 4.50 GHz.

Architecture Differences

The Intel Core i5-14400T and Intel Core i9-11900K represent two distinct generations of Intel desktop design. The i5-14400T is built on Raptor Lake-R architecture using a 10 nm process node, while the i9-11900K uses Rocket Lake architecture on a 14 nm process node. This process difference is fundamental: the newer 10 nm node allows the i5-14400T to achieve its performance targets at a dramatically lower TDP of 35 watts, compared to the 125 watt TDP of the i9-11900K.

The core configurations diverge significantly. The i5-14400T packs 10 cores and 16 threads, while the i9-11900K has 8 cores and 16 threads. The i5-14400T therefore offers two additional physical cores, though both parts expose the same thread count. Cache hierarchies also differ: the i5-14400T has a larger L3 cache at 20 MB shared, versus 16 MB shared on the i9-11900K. Per-core L2 cache is also larger on the newer chip, with 1.25 MB per core compared to 512 KB per core on the i9-11900K. Both processors share the same L1 cache size at 80 KB per core.

Platform support separates the two as well. The i5-14400T uses Intel Socket 1700 and supports DDR4 and DDR5 memory, plus PCIe Gen 5 with 16 lanes from the CPU. The i9-11900K uses Intel Socket 1200, supports only DDR4, and has PCIe Gen 4 with 20 lanes. The i9-11900K includes ECC memory support as false, while the i5-14400T reports ECC memory as true. Integrated graphics differ too: the i5-14400T carries UHD Graphics 730, and the i9-11900K carries UHD Graphics 750.

The i9-11900K has an unlocked multiplier, making it a K-series overclocking part, while the i5-14400T has a locked multiplier. The i9-11900K is listed as end-of-life production status, whereas the i5-14400T is active. The die sizes reflect the generational shift: the i5-14400T measures 215 mm², while the i9-11900K is larger at 276 mm². The i9-11900K also has a recorded memory bandwidth of 51.2 GB/s, a figure not listed for the i5-14400T.

Head-to-Head Benchmarks

The benchmark data shows a clear pattern: the Intel Core i9-11900K wins 13 of the 17 recorded comparisons, while the Intel Core i5-14400T wins 4. The margin of victory for the i9-11900K is often substantial, particularly in compute-heavy workloads.

Starting with Cinebench, the i9-11900K dominates across every version and thread count. In Cinebench R15 multi-core, the i9-11900K scores 2133 against 1732 for the i5-14400T, an 18.8 percent lead. Single-core R15 shows the same gap: 300 versus 244, also 18.8 percent. The pattern repeats in R20 multi-core (8890 versus 7219, 18.8 percent), R20 single-core (1254 versus 1018, 18.8 percent), R23 multi-core (21168 versus 17189, 18.8 percent), and R23 single-core (2988 versus 2426, 18.8 percent). The consistency of the 18.8 percent delta across all six Cinebench tests indicates a uniform performance advantage for the i9-11900K in both multi-threaded and single-threaded rendering workloads.

PassMark results tell a more varied story. The i9-11900K leads in data compression with a score of 330836 versus 235636, a 28.8 percent advantage. In data encryption, the i9-11900K scores 16000 against 13244, a 17.2 percent lead. The largest gap appears in extended instructions, where the i9-11900K scores 23406 versus 14562, a 37.8 percent advantage. Integer math also favors the i9-11900K heavily: 89279 versus 65667, a 26.4 percent lead. Random string sorting goes to the i9-11900K at 37942 versus 25181, a 33.6 percent margin. Floating point math is closer, with the i9-11900K ahead at 52841 versus 49139, a 7 percent difference. PassMark multi-thread shows the i9-11900K at 25038 versus 20223, a 19.2 percent lead.

The i5-14400T's victories are narrower but notable. In PassMark find prime numbers, the i5-14400T scores 73 against 68, a 7.4 percent win. In PassMark physics, the i5-14400T scores 1244 versus 1052, an 18.3 percent advantage. The single-thread tests are essentially a tie: 3512 versus 3511, with the i5-14400T winning by a hair at 0 percent delta in both PassMark single-thread and PassMark singlethread entries.

Overall average benchmark scores place the i5-14400T at 27166 and the i9-11900K at 26639, meaning the i5-14400T has a slightly higher average across all recorded benchmarks despite losing most head-to-head comparisons. Both CPUs sit at the 79th percentile versus all CPUs in the database.

The Verdict

The data directs different users to different chips. The Intel Core i9-11900K is the stronger performer in rendering, compression, encryption, integer math, and most multi-threaded workloads, with leads ranging from 7 percent to 37.8 percent across the benchmark suite. For users running Cinebench-style workloads, data compression, or extended instruction sets, the i9-11900K is the clear choice based on recorded scores.

The Intel Core i5-14400T, however, offers its own advantages. It wins in PassMark physics and prime number finding, and matches the i9-11900K in single-thread performance. It does all this while drawing 35 watts of power compared to 125 watts, and it supports DDR5 memory and PCIe Gen 5, giving it a more modern platform foundation. The i5-14400T also has a higher average benchmark score of 27166 versus 26639, and it remains an active production part.

The i9-11900K is for users who prioritize raw compute throughput and are willing to accept a 125 watt TDP and older platform constraints. The i5-14400T is for users who need competitive single-thread performance, lower power draw, and access to newer memory and PCIe standards. The benchmark record does not show a single winner across all categories; it shows a trade-off between peak performance and platform efficiency.

Specification Differences

| Specification | Intel Core i5-14400T | Intel Core i9-11900K |

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

| Cores | 10 | 8 |

| Threads | 16 | 16 |

| Base Clock | 1.50 GHz | 3.50 GHz |

| Boost Clock | 4.50 GHz | 5.30 GHz |

| TDP | 35 W | 125 W |

| Socket | Intel Socket 1700 | Intel Socket 1200 |

| Architecture | Raptor Lake | Rocket Lake |

| Process Node | 10 nm | 14 nm |

| Die Size | 215 mm² | 276 mm² |

| L2 Cache | 1.25 MB (per core) | 512 KB (per core) |

| L3 Cache | 20 MB (shared) | 16 MB (shared) |

| Memory Support | DDR4, DDR5 | DDR4 |

| Memory Bandwidth | Not listed | 51.2 GB/s |

| ECC Memory | true | false |

| PCIe | Gen 5, 16 Lanes (CPU only) | Gen 4, 20 Lanes (CPU only) |

| Integrated Graphics | UHD Graphics 730 | UHD Graphics 750 |

| Production Status | Active | End-of-life |

| Multiplier Unlocked | false | true |

| Launch MSRP | $221 | $539 |