Intel Core 7 251E vs Intel Core Ultra 7 265T Comparison

Where Each One Wins

The recorded data splits these two desktop processors cleanly by workload type. The Intel Core 7 251E, built on the Bartlett Lake design, offers 24 cores and 32 threads, making it the higher-core-count part. The Intel Core Ultra 7 265T, part of the Core Ultra Series 2 with Arrow Lake architecture, provides 20 cores and 20 threads. That core and thread disparity dictates the benchmark outcomes.

For the Core Ultra 7 265T, the database shows a full set of benchmark scores, and it wins every recorded test. None of the measured workloads favor the Core 7 251E, which has no benchmark entries in the database. The Ultra 7 265T sits at the 90th percentile among all CPUs, with an average benchmark score of 47,697. Its nearest rivals include the AMD Ryzen 9 PRO 5945 at 47,527 (0.4% ahead), the AMD Ryzen 9 7900X3D at 47,908 (0.4% behind), the AMD Ryzen 9 3900 at 47,918 (0.5% behind), and the Intel Core Ultra X9 378H at 47,468 (0.5% ahead). This places the Ultra 7 265T in a tightly contested performance band where even small score differences separate competitors.

The Core 7 251E has a 50th percentile ranking among all CPUs and an average benchmark score of zero, indicating no recorded measurements. As a result, the use-case split is one-sided: the Ultra 7 265T dominates every measurable category, from single-threaded tasks to multi-threaded rendering. The Core 7 251E’s higher core count does not translate into any recorded victory, as the database contains no scores for it. For workloads such as Cinebench rendering, PassMark integer math, floating-point math, data compression, and encryption, the Ultra 7 265T delivers the only available data points.

Architecture Differences

The two processors diverge on nearly every fundamental design parameter. The Core 7 251E uses the Bartlett Lake codename, belongs to the Core 7 generation, and is fabricated on Intel’s 10 nm process node. It measures 257 mm² in die size and supports both DDR4 and DDR5 memory through a dual-channel memory bus, with a memory bandwidth of 89.6 GB/s. Its cache hierarchy includes 80 KB of L1 per core, 2 MB of L2 per core, and 36 MB of shared L3. The chip supports ECC memory, uses PCIe Gen 5 with 16 CPU lanes, and integrates UHD Graphics 770. It fits the Intel Socket 1700.

The Core Ultra 7 265T uses Arrow Lake architecture with the Arrow Lake-S codename, belongs to the Ultra 7 generation, and is fabricated on TSMC’s 3 nm process node. The die size is 243 mm², and the chip contains 17,800 million transistors. Memory support is limited to DDR5, still dual-channel, but bandwidth rises to 102.4 GB/s. L1 cache is 192 KB per core, L2 is 3 MB per core, and L3 is 30 MB shared. ECC memory is not supported. PCIe Gen 5 expands to 20 CPU lanes, and integrated graphics are the Arc Xe-LPG Graphics 64EU. It uses Intel Socket 1851.

The manufacturing difference is stark: Intel foundry for the 251E at 10 nm versus TSMC for the 265T at 3 nm. The 265T also carries a much larger L1 and L2 cache allocation per core, despite having fewer total cores. The 251E counters with a larger shared L3 pool (36 MB versus 30 MB). The 265T’s memory bandwidth advantage of 102.4 GB/s over 89.6 GB/s gives it a measurable edge in memory-intensive tasks. The 265T also provides four additional PCIe lanes, which could support more expansion devices.

Power envelopes differ substantially. The 251E has a TDP of 65 watts, while the 265T draws only 35 watts. That lower power figure, combined with the TSMC 3 nm node, suggests higher efficiency per watt, though the database does not record efficiency metrics. Both processors have locked multipliers, so neither supports overclocking. The 251E supports ECC memory, a feature absent from the 265T, which matters for certain workstation scenarios. The 265T’s integrated Arc graphics are likely more capable than the UHD Graphics 770, though no graphics benchmarks are recorded. Both chips launched in January 2025, with the 265T releasing on January 6 and the 251E on January 12. Both carry a launch MSRP of $384.

Head-to-Head Benchmarks

The database provides no direct head-to-head benchmark comparisons between the Core 7 251E and the Core Ultra 7 265T. However, the Ultra 7 265T has a complete set of 17 recorded scores across Cinebench and PassMark tests. The Core 7 251E has zero recorded benchmarks. Therefore, every head-to-head comparison is necessarily one-sided, with the 265T holding all available data.

In Cinebench tests, the 265T scores 3,180 in Cinebench R15 multi-core and 449 in single-core. In Cinebench R20, it reaches 13,254 multi-core and 1,871 single-core. Cinebench R23 results show 31,558 multi-core and 4,455 single-core. These scores indicate strong multi-threaded rendering performance, especially given the 35-watt TDP. The multi-core to single-core ratios are consistent across versions, suggesting balanced scaling across its 20 threads.

PassMark results for the 265T cover a wide range of workloads. Integer math scores 104,943, floating-point math scores 129,817, and extended instructions score 28,609. Data compression hits 370,158, while data encryption reaches 29,687. Prime number finding scores 322, random string sorting scores 44,400, physics scores 2,391, and multithread scores 37,084. Single-thread performance is recorded twice, at 4,338 in both the "single_thread" and "singlethread" tests, confirming consistency.

The nearest rival comparisons show the 265T’s position. It sits 0.4% above the AMD Ryzen 9 PRO 5945 and 0.5% above the Intel Core Ultra X9 378H. It sits 0.4% below the AMD Ryzen 9 7900X3D and 0.5% below the AMD Ryzen 9 3900. These delta percentages are tiny, placing the 265T within a 1% performance window of four other high-end processors. The average benchmark score of 47,697 puts it just below the Ryzen 9 7900X3D’s 47,908 and the Ryzen 9 3900’s 47,918, but just above the Ryzen 9 PRO 5945’s 47,527 and the Core Ultra X9 378H’s 47,468.

Since the 251E has no benchmark entries, no numerical comparison can be made. The database simply does not record any performance data for that chip. The wins tally confirms this: the 251E holds zero wins, while the 265T holds zero wins, because the head-to-head benchmark array is empty. The only conclusion from the data is that the 265T is fully characterized, and the 251E is not.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core 7 251E has 24 cores and 32 threads, while the Intel Core Ultra 7 265T has 20 cores and 20 threads.

Q: What is the performance percentile for each processor?

A: The Core Ultra 7 265T is at the 90th percentile among all CPUs, with an average benchmark score of 47,697. The Core 7 251E is at the 50th percentile, with an average benchmark score of zero.

Q: How does the Core Ultra 7 265T compare to its nearest rivals?

A: The 265T is 0.4% ahead of the AMD Ryzen 9 PRO 5945 and 0.5% ahead of the Intel Core Ultra X9 378H. It is 0.4% behind the AMD Ryzen 9 7900X3D and 0.5% behind the AMD Ryzen 9 3900.

Q: What memory types does each processor support?

A: The Core 7 251E supports both DDR4 and DDR5 memory, while the Core Ultra 7 265T supports only DDR5. Both use a dual-channel memory bus.

Q: What are the TDP ratings for the two chips?

A: The Core 7 251E has a TDP of 65 watts, while the Core Ultra 7 265T has a TDP of 35 watts.

Q: Which processor supports ECC memory?

A: The Core 7 251E supports ECC memory, while the Core Ultra 7 265T does not.

The Verdict

The data in the database supports only one choice for any workload where measured performance matters: the Intel Core Ultra 7 265T. It is the only one of the two with recorded benchmark scores, and those scores are strong. Its 90th percentile ranking and average benchmark score of 47,697 place it among high-end desktop processors, with nearest rivals within a 0.5% delta. The 265T delivers a complete set of Cinebench and PassMark results, covering single-threaded and multi-threaded tasks, math operations, data compression, encryption, and physics simulation.

The Intel Core 7 251E, by contrast, has no recorded benchmark scores and ranks at the 50th percentile. Its higher core count (24 versus 20) and thread count (32 versus 20) suggest theoretical multi-threading potential, but the database contains no evidence of realized performance. Its larger L3 cache (36 MB versus 30 MB) and ECC memory support are the only features where it exceeds the 265T on paper. The 251E also supports DDR4, which may appeal to systems with existing memory, but its 10 nm process and 65-watt TDP contrast unfavorably with the 265T’s 3 nm TSMC node and 35-watt TDP.

For users prioritizing measured performance, the 265T is the only option with any data. Its 102.4 GB/s memory bandwidth, 20 PCIe Gen 5 lanes, and Arc Xe-LPG integrated graphics further differentiate it. The 251E’s lack of benchmarks means it cannot be recommended on the basis of recorded results. The verdict from the database is unambiguous: the Core Ultra 7 265T is the processor with proven capabilities, while the Core 7 251E remains an unverified entry. Both share a launch MSRP of $384, but only one has numbers to justify that price.