Intel Core i5-11400T vs Intel Core i5-1240P Comparison

Head-to-Head Benchmarks

The benchmark data presents a clear split between the two processors. The Intel Core i5-1240P wins five of the six recorded head-to-head tests, while the Intel Core i5-11400T claims a single, decisive victory. The most striking result is in Cinebench R23 multi-core, where the i5-11400T scores 11113 against the i5-1240P's 9392, a delta of 18.3% in favor of the desktop part. This is the largest margin in either direction across all tests.

Outside of that one result, the i5-1240P dominates. In Cinebench R15 multi-core, the i5-1240P scores 1566.5 versus 1120 for the i5-11400T, a 28.5% advantage. The single-core gap is even wider in percentage terms: the i5-1240P posts 226 in Cinebench R15 single-core against 157, which is a 30.5% lead. Cinebench R20 shows a similar pattern, with the i5-1240P ahead by 17.1% in multi-core (5632 vs 4667) and by 17.2% in single-core (795 vs 658).

The closest contest is Cinebench R23 single-core. Here the i5-1240P scores 1600, just 1.9% ahead of the i5-11400T's 1569. That narrow margin indicates the two architectures are nearly matched in lightly threaded, sustained single-core workloads from the R23 suite. The i5-11400T also appears in the Geekbench results, but the i5-1240P does not have a recorded Geekbench entry in the database, so no direct comparison is possible for that test.

Looking at average benchmark scores, the i5-11400T holds a slight overall edge. Its average is 3309 across all recorded tests, while the i5-1240P averages 3202. This is because the i5-11400T's large Cinebench R23 multi-core win offsets several smaller losses. The percentile rankings reflect this near parity: the i5-11400T sits at the 54th percentile of all CPUs, and the i5-1240P at the 53rd. The nearest rivals for the i5-11400T include the AMD Ryzen 3 5300G with an average score of 3303 (0.2% behind), the AMD Ryzen 5 PRO 2600 also at 3303 (0.2% behind), the Intel Core i5-11500T at 3288 (0.6% behind), and the Intel Core i7-7800X at 3333 (0.7% ahead). The i5-1240P's nearest rivals are the Intel Core i3-13100T at 3198 (0.1% behind), the Intel Core i7-9700E at 3197 (0.2% behind), the Intel Xeon E-2136 at 3193 (0.3% behind), and the Intel Atom P5342 at 3217 (0.5% ahead). Both chips are clustered tightly among their peers, meaning neither is an outlier in its class.

Architecture Differences

The two processors come from different Intel generations and use different process nodes. The i5-11400T is built on Rocket Lake, a 14 nm design with a die size of 276 mm². The i5-1240P uses Alder Lake-P on a 10 nm process with a smaller die at 217 mm². The manufacturing foundry is Intel for both.

Core and thread counts differ significantly. The i5-11400T has 6 cores and 12 threads, while the i5-1240P has 12 cores and 16 threads. The i5-1240P's implementation relies on a hybrid architecture that the database records as Alder Lake, but the core count alone explains much of its multi-core advantage in shorter workloads. The i5-11400T is a conventional desktop part, while the i5-1240P is a mobile part in the Alder Lake-P series.

Cache layouts also diverge. Both share 12 MB of L3 cache, but the L2 cache differs: the i5-11400T has 512 KB per core, while the i5-1240P has 1.25 MB per core. The L1 cache is identical at 80 KB per core. Clock speeds favor the i5-1240P, which has a base clock of 1700 MHz and a boost clock of 4400 MHz. The i5-11400T runs at 1300 MHz base and 3700 MHz boost. The i5-1240P also carries a lower TDP at 28 watts versus 35 watts for the i5-11400T.

Memory support differs. The i5-11400T supports DDR4 only, while the i5-1240P supports both DDR4 and DDR5. Both use dual-channel memory buses. The i5-11400T has a recorded memory bandwidth of 51.2 GB/s, while no bandwidth figure is listed for the i5-1240P. Neither chip supports ECC memory. Both use PCIe Gen 4 with 20 lanes from the CPU.

The integrated graphics differ. The i5-11400T includes UHD Graphics 730, while the i5-1240P ships with Iris Xe 80EU. The i5-11400T uses the Intel Socket 1200, whereas the i5-1240P uses Intel BGA 1744, reflecting its mobile design. The market segments confirm this: the i5-11400T is a desktop processor and is end-of-life, while the i5-1240P is an active mobile processor.

Where Each One Wins

The i5-1240P wins in most benchmark categories, but the i5-11400T has a specific and important strength. The i5-1240P's wins come in Cinebench R15, R20, and R23 single-core, plus R15 and R20 multi-core. The single-core results are particularly one-sided in R15 and R20, with leads of 30.5% and 17.2% respectively. This makes the i5-1240P the better choice for workloads that depend on rapid response from a single thread, such as everyday application responsiveness or lightly threaded tasks.

The i5-1240P also leads in multi-core tests that do not extend to very long durations. In Cinebench R15 multi-core, it is 28.5% ahead, and in R20 multi-core, 17.1% ahead. These tests are shorter than R23, and the i5-1240P's higher boost clock of 4400 MHz and larger core count give it an edge in bursty multi-threaded work.

The i5-11400T wins the Cinebench R23 multi-core test by 18.3%. This is the longest sustained multi-core workload in the recorded set, and the result indicates the desktop part maintains performance better over extended periods. The lower TDP of the i5-1240P, 28 watts, may contribute to thermal or power limits that reduce its sustained output. The i5-11400T also has a higher TDP at 35 watts, which can support continued operation under load.

For use-case planning, the split is clear. The i5-1240P suits scenarios where single-threaded speed and moderate multi-threaded bursts matter most. The i5-11400T suits sustained multi-threaded rendering or compute workloads where long-duration consistency is more important than peak short-term output.

The Verdict

The data supports a clear verdict by workload type. For users prioritizing single-threaded performance and shorter multi-threaded bursts, the Intel Core i5-1240P is the stronger part. It wins five of six head-to-head tests, with margins as large as 30.5% in Cinebench R15 single-core and 28.5% in Cinebench R15 multi-core. Its higher boost clock, 4400 MHz versus 3700 MHz, and its larger core count, 12 versus 6, align with these results.

For sustained multi-threaded workloads, the Intel Core i5-11400T is the better choice. Its 18.3% lead in Cinebench R23 multi-core is the single largest win in the comparison, and it comes in the test that stresses the processor the longest. The i5-11400T also holds a higher average benchmark score, 3309 versus 3202, and a slightly better percentile ranking, 54th versus 53rd.

The i5-1240P is a mobile part with a lower TDP, 28 watts, and active production status. The i5-11400T is a desktop part, end-of-life, with a 35 watt TDP. The i5-1240P supports both DDR4 and DDR5 memory, while the i5-11400T is limited to DDR4. The i5-11400T has a recorded memory bandwidth of 51.2 GB/s, while the i5-1240P has no such figure in the database. The i5-1240P also includes a more capable integrated GPU, the Iris Xe 80EU, compared to the UHD Graphics 730 in the i5-11400T.

There is no universal winner. The i5-1240P is the pick for general responsiveness, single-threaded applications, and mobile systems. The i5-11400T is the pick for sustained multi-threaded rendering and compute tasks where the longer R23 test reflects real-world endurance. Neither chip is far from its nearest rivals, and both sit near the middle of the overall CPU distribution.

FAQ

Q: Which processor has the higher single-core benchmark score?

A: The Intel Core i5-1240P scores higher in every recorded single-core test. It leads by 30.5% in Cinebench R15, 17.2% in Cinebench R20, and 1.9% in Cinebench R23.

Q: Which processor wins in multi-core performance?

A: It depends on the test. The i5-1240P wins Cinebench R15 multi-core by 28.5% and R20 multi-core by 17.1%. The i5-11400T wins Cinebench R23 multi-core by 18.3%.

Q: How do the core counts compare?

A: The i5-11400T has 6 cores and 12 threads. The i5-1240P has 12 cores and 16 threads.

Q: What memory types does each processor support?

A: The i5-11400T supports DDR4 only. The i5-1240P supports both DDR4 and DDR5. Both use dual-channel memory buses.

Q: Are these processors still in production?

A: The i5-11400T is end-of-life. The i5-1240P is active and currently in production.

Q: What is the average benchmark score for each?

A: The i5-11400T has an average benchmark score of 3309, and the i5-1240P has an average of 3202. The i5-11400T ranks at the 54th percentile of all CPUs, while the i5-1240P ranks at the 53rd.

Specification Differences

| Specification | Intel Core i5-11400T | Intel Core i5-1240P |

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

| Cores | 6 | 12 |

| Threads | 12 | 16 |

| Base clock | 1300 MHz | 1700 MHz |

| Boost clock | 3700 MHz | 4400 MHz |

| TDP | 35 W | 28 W |

| Socket | Intel Socket 1200 | Intel BGA 1744 |

| Architecture | Rocket Lake | Alder Lake |

| Process node | 14 nm | 10 nm |

| Die size | 276 mm² | 217 mm² |

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

| L3 cache | 12 MB (shared) | 12 MB (shared) |

| Memory support | DDR4 | DDR4, DDR5 |

| Memory bandwidth | 51.2 GB/s | Not recorded |

| Integrated graphics | UHD Graphics 730 | Iris Xe 80EU |

| Market segment | Desktop | Mobile |

| Production status | End-of-life | Active |

| Release date | 2021-03-15 | 2022-02-22 |

| Launch MSRP | $182 | Not recorded |