Intel Core i5-14400T vs Intel Core i9-12900HK Comparison

Where Each One Wins

The benchmark data splits these two processors into clearly different roles. The Intel Core i5-14400T wins only two of the seventeen head-to-head tests, while the Intel Core i9-12900HK dominates the remaining fifteen. That lopsided count might suggest a simple verdict, but the specific tests each chip wins tell a more interesting story.

The i5-14400T takes the Cinebench R15 single-core test with 244 points against 242, a razor-thin 0.8% margin. It also wins Cinebench R23 single-core with 2426 points versus 1673, a massive 45% advantage. These are both single-threaded rendering workloads, which points to the desktop chip having a meaningful edge in lightly threaded scenarios.

The i9-12900HK, by contrast, wins every other recorded benchmark. Its victories span the full Cinebench multi-core suite, all PassMark workloads from data compression to floating-point math, and the PassMark single-thread test as well. The mobile chip leads by margins ranging from 1.5% in PassMark single-thread up to 37.8% in Cinebench R15 multi-core.

This is not a simple case of one chip being universally faster. The i5-14400T has a genuine single-core advantage in Cinebench R23, while the i9-12900HK dominates everything else. Users who prioritize the latest Cinebench single-thread metric would favor the desktop part, but anyone running multi-threaded or diverse workloads would see the mobile chip pull ahead consistently.

Architecture Differences

The two processors come from different Intel generations and design families. The i5-14400T is a Raptor Lake Refresh part, specifically the Raptor Lake-R codename, built on a 10 nm process with a 215 mm² die. It belongs to the Core 14th Gen series and targets desktop systems with an Intel Socket 1700.

The i9-12900HK uses the older Alder Lake-H architecture, also on a 10 nm node with a 217 mm² die, but it is a mobile part with an Intel BGA 1744 socket. Both chips share the same per-core cache structure: 80 KB L1 and 1.25 MB L2 per core. The shared L3 cache differs, with the i5-14400T offering 20 MB and the i9-12900HK providing 24 MB.

Core counts also diverge. The i5-14400T has 10 cores and 16 threads, while the i9-12900HK has 14 cores and 20 threads. That extra core and thread headroom helps explain the multi-core benchmark results. The i9 also has a higher base clock at 2.50 GHz versus 1.50 GHz, and a higher boost clock at 5.00 GHz versus 4.50 GHz.

The integrated graphics differ as well. The i5-14400T ships with UHD Graphics 730, while the i9-12900HK includes Iris Xe 96EU. Memory support is identical on paper: both handle DDR4 and DDR5 with dual-channel buses. The i5-14400T supports ECC memory, the i9-12900HK does not. PCIe generation and lane counts also differ: the i5-14400T uses Gen 5 with 16 CPU lanes, the i9-12900HK uses Gen 4 with 20 CPU lanes.

The i5-14400T has a locked multiplier, while the i9-12900HK has an unlocked multiplier, meaning the mobile chip allows overclocking. The i5-14400T launched on 2024-01-07 with a launch MSRP of $221. The i9-12900HK launched on 2022-01-03 with no recorded MSRP.

Head-to-Head Benchmarks

The largest single victory belongs to the i9-12900HK in Cinebench R15 multi-core, where it scores 2786 against 1732, a 37.8% lead. That is a substantial gap and reflects the i9's higher core count and thread count in a workload that scales well with parallel resources.

Cinebench R20 multi-core shows a similar pattern. The i9-12900HK scores 8958 versus 7219, a 19.4% advantage. Cinebench R23 multi-core narrows the gap considerably: 18288 versus 17189, just 6% ahead. The newer Cinebench version appears to compress the multi-core difference, though the i9 still wins.

The i5-14400T's biggest win is Cinebench R23 single-core, where it scores 2426 against 1673, a 45% margin. That is by far the largest percentage difference in either direction. The i5 also edges out the i9 in Cinebench R15 single-core, 244 to 242, a 0.8% margin.

The i9-12900HK wins Cinebench R20 single-core as well, scoring 1264 versus 1018, a 19.5% lead. This creates an odd pattern: the i5 wins R15 and R23 single-core, but the i9 wins R20 single-core. The PassMark single-thread test also goes to the i9, 3567 versus 3512, a modest 1.5% edge.

PassMark workloads consistently favor the i9-12900HK. Data compression shows 294908 versus 235636, a 20.1% lead. Data encryption shows 17445 versus 13244, a 24.1% lead. Extended instructions score 17583 versus 14562, a 17.2% lead. Prime number finding scores 102 versus 73, a 28.4% lead. Floating-point math scores 63572 versus 49139, a 22.7% lead. Integer math scores 89527 versus 65667, a 26.7% lead. Multithread score is 25697 versus 20223, a 21.3% lead. Physics scores 1673 versus 1244, a 25.6% lead. Random string sorting scores 32983 versus 25181, a 23.7% lead.

The overall average benchmark scores reflect this split. The i5-14400T has an average score of 27166, while the i9-12900HK averages 26469. Despite winning most head-to-head tests, the i9 actually has a lower average benchmark score. The i5 sits at the 79th percentile among all CPUs, the i9 at the 78th.

Specification Differences

| Specification | Intel Core i5-14400T | Intel Core i9-12900HK |

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

| Series | Core 14th Gen | Core 12th Gen |

| Architecture | Raptor Lake | Alder Lake |

| Codename | Raptor Lake-R | Alder Lake-H |

| Generation | Core i5 (Raptor Lake Refresh) | Core i9 (Alder Lake-H) |

| Cores | 10 | 14 |

| Threads | 16 | 20 |

| Base Clock | 1.50 GHz | 2.50 GHz |

| Boost Clock | 4.50 GHz | 5.00 GHz |

| TDP | 35 | 45 |

| Socket | Intel Socket 1700 | Intel BGA 1744 |

| Die Size | 215 mm² | 217 mm² |

| L3 Cache | 20 MB (shared) | 24 MB (shared) |

| ECC Memory | Yes | No |

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

| Integrated Graphics | UHD Graphics 730 | Iris Xe 96EU |

| Market Segment | Desktop | Mobile |

| Multiplier Unlocked | No | Yes |

| Launch Date | 2024-01-07 | 2022-01-03 |

| Launch MSRP | $221 | None recorded |

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core i9-12900HK has 14 cores and 20 threads, while the Intel Core i5-14400T has 10 cores and 16 threads.

Q: Why does the i5-14400T win some single-core tests despite lower clock speeds?

A: The i5-14400T wins Cinebench R15 single-core (244 vs 242, a 0.8% margin) and Cinebench R23 single-core (2426 vs 1673, a 45% margin). The i9-12900HK still wins Cinebench R20 single-core (1264 vs 1018, a 19.5% lead) and PassMark single-thread (3567 vs 3512, a 1.5% lead), so the single-core advantage is not consistent across all tests.

Q: How do the two chips compare in overall average benchmark scores?

A: The i5-14400T has an average benchmark score of 27166, which is higher than the i9-12900HK's 26469. The i5 also sits at the 79th percentile among all CPUs, one point above the i9's 78th percentile.

Q: Which processor supports ECC memory?

A: Only the Intel Core i5-14400T supports ECC memory. The Intel Core i9-12900HK does not list ECC support.

Q: What are the socket and market segment differences?

A: The i5-14400T uses Intel Socket 1700 and is a desktop processor. The i9-12900HK uses Intel BGA 1744 and is a mobile processor.

Q: Which chip has an unlocked multiplier?

A: The Intel Core i9-12900HK has an unlocked multiplier, allowing overclocking. The Intel Core i5-14400T has a locked multiplier.

The Verdict

The data presents a clear but nuanced choice. The Intel Core i9-12900HK wins 15 of 17 head-to-head benchmarks, including every multi-core test and nearly all PassMark workloads. Its 14 cores and 20 threads, combined with higher base and boost clocks, deliver consistent advantages across rendering, encryption, compression, and math workloads. The 37.8% lead in Cinebench R15 multi-core and the 24.1% lead in data encryption are particularly strong results.

The Intel Core i5-14400T wins only two tests, but one of those is a decisive 45% victory in Cinebench R23 single-core. It also holds a slim 0.8% edge in Cinebench R15 single-core. For users whose primary workload is Cinebench R23 single-threaded rendering, the i5-14400T is the better choice.

The i9-12900HK's overall average benchmark score is actually lower than the i5-14400T's (26469 versus 27166), and both chips land within one percentile point of each other globally. This suggests the i9's many wins are often narrow in overall impact, while the i5's single big win in R23 single-core carries outsized weight in the average.

For desktop builders who need broad multi-threaded performance and can accept a mobile chip's BGA socket, the i9-12900HK is the stronger pick. For users who prioritize the latest Cinebench single-thread score and want a desktop socket with ECC support and a lower 35 TDP, the i5-14400T makes sense. The i9-12900HK also offers an unlocked multiplier and a larger 24 MB L3 cache, while the i5-14400T counters with PCIe Gen 5 support and a 2024 launch date. The recorded data does not support a universal winner; it supports two different processors for two different priorities.