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

The Intel Core 7 251TE and Intel Core Ultra 7 265T are two desktop processors that target different priorities within the same performance envelope. The 251TE offers a higher core and thread count with a higher boost clock, while the 265T counters with a newer architecture, a more advanced process node, and significantly better benchmark results in most tests. The data shows a clear split: the 251TE holds one decisive win in integer math, while the 265T dominates the remaining recorded benchmarks, often by substantial margins.

Where Each One Wins

The benchmark results indicate that the Intel Core Ultra 7 265T is the stronger performer in nearly every recorded workload. It wins 16 out of the 17 head-to-head comparisons, including all Cinebench tests and the majority of PassMark tests. In multi-threaded rendering, the 265T posts a Cinebench R23 multi-core score of 31558, which is 19.1% ahead of the 251TE's 25518. The lead is even larger in floating-point math, where the 265T scores 129817, a 34.1% advantage over the 251TE's 85607. The 265T also excels in extended instructions, scoring 28609, which is 40.7% higher than the 251TE's 16974.

The Intel Core 7 251TE wins only one test: PassMark integer math. Its score of 125739 beats the 265T's 104943 by 19.8%. This single victory indicates that the 251TE's higher core count and thread count provide a specific advantage in integer-heavy workloads. The 251TE has 24 cores and 32 threads, compared to the 265T's 20 cores and 20 threads. This extra parallelism helps in tasks that scale with thread count, but it does not translate to broader performance superiority. The 265T compensates with a higher base clock of 1.50 GHz compared to 1.40 GHz, and its architecture delivers better per-core efficiency.

Architecture Differences

The two processors are built on fundamentally different foundations. The Intel Core 7 251TE uses the Bartlett Lake architecture and is fabricated on a 10 nm process at Intel. The Intel Core Ultra 7 265T uses the Arrow Lake architecture, specifically Arrow Lake-S, and is fabricated on a 3 nm process at TSMC. The process node difference is significant: the 3 nm process allows for denser transistors and better power efficiency. The 265T contains 17,800 million transistors on a 243 mm² die, while the 251TE does not have a recorded transistor count but has a smaller die size of 215 mm².

Cache configurations also differ sharply. The 251TE has 80 KB of L1 cache per core and 1.25 MB of L2 cache per core, with 36 MB of shared L3 cache. The 265T has 192 KB of L1 cache per core and 3 MB of L2 cache per core, with 30 MB of shared L3 cache. Despite having less total L3 cache, the 265T's larger per-core L1 and L2 caches likely contribute to its higher single-thread performance. The 265T scores 4455 in Cinebench R23 single-core, a 19.1% lead over the 251TE's 3602.

Memory support also differs. The 251TE supports both DDR4 and DDR5 memory with a dual-channel bus and a recorded bandwidth of 89.6 GB/s. The 265T supports only DDR5, also dual-channel, but with a higher recorded bandwidth of 102.4 GB/s. The 265T also has more PCIe lanes: 20 lanes of Gen 5 compared to 16 lanes on the 251TE. ECC memory support is present on the 251TE but absent on the 265T. The integrated graphics differ as well, with the 251TE using UHD Graphics 770 and the 265T using Arc Xe-LPG Graphics 64EU. Both processors share the same launch MSRP of $384.

The Verdict

The data points to the Intel Core Ultra 7 265T as the better overall processor for most users. It wins the majority of benchmarks, often by double-digit percentages. Its 3 nm process node, newer Arrow Lake architecture, and higher memory bandwidth give it clear advantages in single-threaded performance, multi-threaded rendering, and specialized instruction workloads. The 265T also achieves this while having a lower TDP of 35 watts compared to the 251TE's 45 watts. For workloads that benefit from higher per-core performance, better floating-point throughput, or faster data encryption, the 265T is the clear choice.

The Intel Core 7 251TE is only preferable in one specific scenario: integer math. Its 24 cores and 32 threads deliver a 19.8% win in PassMark integer math, which could matter for certain compute tasks that rely heavily on integer operations. However, this single win does not offset the 265T's dominance elsewhere. The 251TE also supports ECC memory, which the 265T does not, and it supports DDR4 memory, which may be relevant for systems reusing older memory modules. The 251TE uses the Intel Socket 1700, while the 265T uses the Intel Socket 1851, so motherboard compatibility will be a deciding factor for any build.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core 7 251TE has 24 cores and 32 threads. The Intel Core Ultra 7 265T has 20 cores and 20 threads.

Q: How do the two processors compare in multi-core Cinebench R23 performance?

A: The Intel Core Ultra 7 265T scores 31558, which is 19.1% higher than the Intel Core 7 251TE's score of 25518.

Q: Does the Intel Core 7 251TE win any benchmark?

A: Yes, the 251TE wins the PassMark integer math test with a score of 125739, which is 19.8% ahead of the 265T's 104943.

Q: What are the process node differences between the two processors?

A: The Intel Core 7 251TE is fabricated on a 10 nm process at Intel. The Intel Core Ultra 7 265T is fabricated on a 3 nm process at TSMC.

Q: Which processor supports ECC memory?

A: The Intel Core 7 251TE supports ECC memory. The Intel Core Ultra 7 265T does not support ECC memory.

Q: What is the memory bandwidth for each processor?

A: The Intel Core 7 251TE has a memory bandwidth of 89.6 GB/s. The Intel Core Ultra 7 265T has a memory bandwidth of 102.4 GB/s.

Head-to-Head Benchmarks

The most lopsided result is in PassMark find prime numbers. The Intel Core Ultra 7 265T scores 322, which is 56.5% ahead of the 251TE's 140. This test is heavily dependent on instruction efficiency and single-thread performance, where the 265T's architecture excels. The 265T also shows a 40.7% lead in PassMark extended instructions, scoring 28609 against the 251TE's 16974. This points to better support for modern instruction sets on the 265T.

In floating-point math, the 265T's 129817 score is 34.1% higher than the 251TE's 85607. Data encryption also favors the 265T, which scores 29687, a 25.3% improvement over the 251TE's 22176. The Cinebench suite shows consistent 19% leads for the 265T across R15, R20, and R23, in both single-core and multi-core tests. For example, Cinebench R15 multi-core sees the 265T at 3180 versus the 251TE's 2572, a 19.1% difference.

The PassMark multi-thread test gives the 265T a 19% win, scoring 37084 against 30022. Physics performance follows a similar pattern, with the 265T at 2391 versus 1938, an 18.9% lead. Single-thread performance in PassMark shows the 265T at 4338, which is 17.8% ahead of the 251TE's 3568. Random string sorting favors the 265T by 10.7%, with scores of 44400 and 39643. Data compression shows a smaller gap, with the 265T at 370158 versus 334399, a 9.7% lead.

The only benchmark where the 251TE comes out ahead is PassMark integer math. The 251TE's score of 125739 beats the 265T's 104943 by 19.8%. This result aligns with the 251TE's higher thread count of 32 versus 20, which provides more parallel execution resources for integer operations. No other recorded benchmark shows a win for the 251TE.

Specification Differences

The two processors differ in several key specifications. The Intel Core 7 251TE has 24 cores and 32 threads, while the Intel Core Ultra 7 265T has 20 cores and 20 threads. Base clocks are 1.40 GHz for the 251TE and 1.50 GHz for the 265T. Boost clocks are 5.40 GHz for the 251TE and 5.30 GHz for the 265T. The 251TE has a TDP of 45 watts, while the 265T has a TDP of 35 watts.

Sockets differ: the 251TE uses Intel Socket 1700, and the 265T uses Intel Socket 1851. The 251TE is built on Bartlett Lake with a 10 nm process at Intel, while the 265T uses Arrow Lake with a 3 nm process at TSMC. The 265T has a transistor count of 17,800 million and a die size of 243 mm², while the 251TE has a die size of 215 mm² with no recorded transistor count.

Cache layouts are distinct. The 251TE has 80 KB of L1 cache per core, 1.25 MB of L2 cache per core, and 36 MB of shared L3 cache. The 265T has 192 KB of L1 cache per core, 3 MB of L2 cache per core, and 30 MB of shared L3 cache. Memory support on the 251TE includes DDR4 and DDR5, while the 265T supports only DDR5. Both use a dual-channel memory bus, but the 251TE has 89.6 GB/s bandwidth versus the 265T's 102.4 GB/s.

ECC memory support is present on the 251TE but not on the 265T. PCIe connectivity favors the 265T, which offers Gen 5 with 20 CPU lanes, while the 251TE offers Gen 5 with 16 CPU lanes. Integrated graphics are UHD Graphics 770 on the 251TE and Arc Xe-LPG Graphics 64EU on the 265T. Both processors are unlocked, meaning their multipliers cannot be adjusted, and both have the same launch MSRP of $384. The 251TE has a part number of SRQAXQ5ZG, while the 265T has a part number of SRQCS.