Intel Core 7 251E vs Intel Core i5-14400T Comparison

Where Each One Wins

The Intel Core 7 251E and the Intel Core i5-14400T target different segments of the desktop market, and the recorded data reveals a clear split in workload strengths. The Core i5-14400T has a complete set of benchmark scores across Cinebench R15, R20, R23, and PassMark tests, while the Core 7 251E has no recorded benchmark entries in the database. This means every measurable performance data point comes from the i5-14400T, which delivers a multi-core Cinebench R23 score of 17189 and a single-core score of 2426. The Core 7 251E, by contrast, is listed with zero benchmark scores and an average benchmark score of zero, so the database contains no direct performance measurements for it.

Without recorded scores for the Core 7 251E, the wins for each processor must be inferred from their specifications rather than from measured results. The Core 7 251E uses 24 cores with 32 threads, a boost clock of 5.60 GHz, and 36 MB of shared L3 cache. The Core i5-14400T uses 10 cores with 16 threads, a boost clock of 4.50 GHz, and 20 MB of shared L3 cache. The Core 7 251E has a 65 W TDP, while the Core i5-14400T has a 35 W TDP. The Core 7 251E also has a 257 mm² die size, compared to 215 mm² for the i5-14400T.

The benchmark results for the i5-14400T show strong multi-threaded performance for its class. Its Cinebench R23 multi-core score of 17189 places it at the 79th percentile among all CPUs in the database, with an average benchmark score of 27166. Its nearest rivals include the Intel Core i9-9900K with an average score of 27097 (0.3% difference), the AMD Ryzen 7 5700G with 27051 (0.4% difference), the Intel Core i7-13700H with 27355 (-0.7% difference), and the AMD Ryzen 3 PRO 5355G with 27382 (-0.8% difference). These deltas show the i5-14400T sits in a tight cluster around the 27100-27400 average score range, slightly behind the i7-13700H and the Ryzen 3 PRO 5355G, but slightly ahead of the i9-9900K and the Ryzen 7 5700G.

For the Core 7 251E, the specification sheet indicates it should win in heavily parallel workloads. With 24 cores and 32 threads, it has more than double the thread count of the i5-14400T. The 36 MB shared L3 cache is 80% larger than the i5-14400T's 20 MB. The boost clock of 5.60 GHz exceeds the i5-14400T's 4.50 GHz by over a gigahertz, which should benefit single-threaded tasks. The integrated graphics also differ: the Core 7 251E uses UHD Graphics 770, while the i5-14400T uses UHD Graphics 730.

Architecture Differences

The two processors share the same Intel Socket 1700 and the same 10 nm process node, but their internal designs diverge significantly. The Core 7 251E belongs to the Bartlett Lake generation, while the Core i5-14400T is part of the Core 14th Gen series with the Raptor Lake architecture and the Raptor Lake-R codename. Bartlett Lake represents a distinct generation within Intel's desktop lineup, whereas the i5-14400T is a Raptor Lake refresh part.

Core configuration is the most substantial difference. The Core 7 251E provides 24 cores and 32 threads, indicating a hybrid arrangement with a mix of performance and efficiency cores. The Core i5-14400T provides 10 cores and 16 threads, which matches the typical Raptor Lake mainstream layout. Thread counts scale accordingly: 32 threads versus 16 threads, giving the Core 7 251E exactly twice the thread capacity.

Cache hierarchies differ in both L2 and L3. The Core 7 251E has 2 MB of L2 cache per core, while the i5-14400T has 1.25 MB per core. L1 cache is identical at 80 KB per core. The shared L3 cache on the Core 7 251E is 36 MB, versus 20 MB on the i5-14400T. This larger cache pool on the Core 7 251E should reduce memory latency for frequently accessed data across all cores.

Clock speeds favor the Core 7 251E in both base and boost states. The base clock is 2.10 GHz versus 1.50 GHz, and the boost clock is 5.60 GHz versus 4.50 GHz. The TDP rating of the Core 7 251E is 65 W, which is higher than the 35 W TDP of the i5-14400T. The die size also differs: 257 mm² for the Core 7 251E versus 215 mm² for the i5-14400T, reflecting the larger core and cache configuration.

Memory support is identical on both parts: DDR4 and DDR5, dual-channel. The Core 7 251E lists a memory bandwidth of 89.6 GB/s, while the i5-14400T has no recorded memory bandwidth figure. Both support ECC memory and both use PCIe Gen 5 with 16 lanes from the CPU. The integrated graphics differ: UHD Graphics 770 on the Core 7 251E versus UHD Graphics 730 on the i5-14400T.

Release dates place the Core 7 251E newer, with a launch date of 2025-01-12, versus 2024-01-07 for the i5-14400T. Both carry a launch MSRP in the database: $384 for the Core 7 251E and $221 for the i5-14400T. Both are listed as active production parts, both are desktop market segment, and both have locked multipliers.

The Verdict

The benchmark database contains measurements only for the Intel Core i5-14400T, so a direct performance comparison cannot be drawn from recorded scores. The i5-14400T achieves a Cinebench R23 multi-core score of 17189, a single-core score of 2426, and an average benchmark score of 27166, placing it at the 79th percentile among all CPUs. Its nearest rivals in the database are the Core i9-9900K, Ryzen 7 5700G, Core i7-13700H, and Ryzen 3 PRO 5355G, all within a 0.8% average score band.

The Core 7 251E has no benchmark entries, so its performance class cannot be quantified from the data. The specification sheet suggests it targets higher-end workloads: 24 cores, 32 threads, 5.60 GHz boost, 36 MB L3, and 65 W TDP. These figures indicate it should outpace the i5-14400T in multi-threaded rendering, compilation, and scientific workloads, while also delivering a higher single-thread ceiling due to the 1.10 GHz boost advantage.

For users choosing between these two, the data supports a clear split. The i5-14400T is the part with verified performance results, showing strong scores for a 35 W desktop processor, with an average score of 27166 and a 79th percentile ranking. The Core 7 251E is the part with theoretical advantages on paper, but the database records no measurements to confirm how those specifications translate into actual performance.

The i5-14400T is the only one of the two with recorded Cinebench and PassMark results, making it the only one that can be compared against the nearest rivals in the database. The Core 7 251E, with its larger core count and higher clocks, appears designed for tasks that scale beyond what a 10-core part can handle, but the absence of data means any such claim remains unverified.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core 7 251E has 24 cores and 32 threads. The Intel Core i5-14400T has 10 cores and 16 threads.

Q: What are the boost clock speeds of each?

A: The Core 7 251E boosts to 5.60 GHz. The Core i5-14400T boosts to 4.50 GHz.

Q: Which one has a larger L3 cache?

A: The Core 7 251E has 36 MB of shared L3 cache. The Core i5-14400T has 20 MB of shared L3 cache.

Q: What is the TDP rating for each processor?

A: The Core 7 251E has a TDP of 65 W. The Core i5-14400T has a TDP of 35 W.

Q: Which processor has recorded benchmark scores in the database?

A: Only the Intel Core i5-14400T has recorded benchmark scores. Its Cinebench R23 multi-core score is 17189, and its single-core score is 2426. The Core 7 251E has no recorded benchmarks.

Q: What is the average benchmark score and percentile for the i5-14400T?

A: The i5-14400T has an average benchmark score of 27166 and sits at the 79th percentile among all CPUs.

Head-to-Head Benchmarks

The database includes no head-to-head benchmark entries for these two processors, and the Core 7 251E has zero recorded benchmark scores. The only measurable performance data comes from the Core i5-14400T, so this section analyzes its recorded results and compares them with its nearest rivals.

The i5-14400T delivers a Cinebench R23 multi-core score of 17189 and a single-core score of 2426. In Cinebench R20, the multi-core score is 7219 and single-core is 1018. In Cinebench R15, multi-core is 1732 and single-core is 244. These three generations of Cinebench show consistent scaling: the R23 multi-core score is 2.38 times the R20 score, and the R20 score is 4.17 times the R15 score.

PassMark results for the i5-14400T show a single-thread score of 3512 and a multithread score of 20223. The integer math score is 65667, floating point math is 49139, and extended instructions score 14562. Data compression reaches 235636, data encryption reaches 13244, and random string sorting reaches 25181. The find prime numbers score is 73, and the physics score is 1244.

Comparing the i5-14400T to its nearest rivals, the average benchmark score of 27166 places it 0.3% above the Intel Core i9-9900K (27097) and 0.4% above the AMD Ryzen 7 5700G (27051). It sits 0.7% below the Intel Core i7-13700H (27355) and 0.8% below the AMD Ryzen 3 PRO 5355G (27382). These deltas are small, all within a 1.5 percentage point span, indicating the i5-14400T performs essentially on par with these four rivals in overall average score.

The largest single benchmark wins for the i5-14400T come in data compression and integer math. The data compression score of 235636 is substantially higher than the multithread score of 20223, showing the processor handles compression workloads with high efficiency. Integer math at 65667 is more than 4 times the floating point math score of 49139, indicating a stronger integer pipeline. The single-thread score of 3512 is consistent across both PassMark single-thread fields, confirming the measurement is stable.

For the Core 7 251E, no benchmark results exist to compare. The specification sheet shows it should exceed the i5-14400T in core count, thread count, L3 cache size, and clock speeds, but the database provides no measured scores to confirm any such advantage. The i5-14400T remains the only one of the two with verified performance data, and its 79th percentile ranking reflects a solid mid-to-upper tier position among all CPUs in the database.