Intel Core Ultra 5 250K Plus vs Intel Core Ultra 7 265T Comparison

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core Ultra 7 265T has 20 cores and 20 threads, while the Intel Core Ultra 5 250K Plus has 18 cores and 18 threads. Both use a 1:1 core-to-thread ratio with no Hyper-Threading.

Q: What is the difference in base clock speeds?

A: The Core Ultra 5 250K Plus has a base clock of 4.20 GHz, while the Core Ultra 7 265T has a base clock of 1.50 GHz. Both processors share the same 5.30 GHz boost clock.

Q: Which processor has the higher TDP?

A: The Core Ultra 5 250K Plus has a TDP of 125 W, whereas the Core Ultra 7 265T has a TDP of 35 W. This is a substantial difference in power envelope.

Q: Do both processors support ECC memory?

A: No. The Core Ultra 5 250K Plus supports ECC memory, but the Core Ultra 7 265T does not. Both support DDR5 memory in a dual-channel configuration.

Q: Which processor is unlocked for overclocking?

A: The Core Ultra 5 250K Plus has an unlocked multiplier, while the Core Ultra 7 265T has a locked multiplier. The "K" in the 250K Plus designation indicates this unlock.

Q: What are the integrated graphics on both chips?

A: Both processors feature Arc Xe-LPG Graphics with 64 execution units. They share the same integrated graphics solution.

Where Each One Wins

The benchmark data splits these two processors into clearly defined roles. The Core Ultra 5 250K Plus wins 14 of the 17 recorded head-to-head benchmarks, while the Core Ultra 7 265T wins only 3. However, the wins for the 265T are notable for their magnitude in specific workloads.

The Core Ultra 5 250K Plus dominates in multi-threaded throughput and data-intensive operations. In Cinebench R15 multicore, it scores 4640 against 3180, a 45.9% advantage. Cinebench R20 multicore shows a 39.1% lead with 18442 versus 13254. PassMark multithread testing shows a 39.1% gap as well, with scores of 51596 and 37084. Data compression results are particularly lopsided: 568721 versus 370158, a 53.6% difference. Extended instructions testing shows a 55.8% lead, and random string sorting shows a 55.6% lead. These results indicate the 250K Plus is built for sustained parallel workloads, encryption, compression, and scientific compute tasks.

The Core Ultra 7 265T wins in Cinebench R23 multicore, Cinebench R15 singlecore, and Cinebench R23 singlecore. The single-core results are striking. In Cinebench R23 singlecore, the 265T scores 4455 against 2261, a 49.2% advantage. In Cinebench R15 singlecore, it scores 449 against 328, a 26.9% lead. The R23 multicore win is narrow at 31558 versus 30867, a 2.2% margin. This pattern suggests the 265T has superior single-thread efficiency per clock, despite its much lower base frequency.

The Core Ultra 5 250K Plus also wins the PassMark single-thread test with 4757 against 4338, a 9.7% margin. This creates an interesting contradiction with the Cinebench single-core results, which favor the 265T. The PassMark single-thread workload appears to reward the higher base clock of the 250K Plus, while Cinebench single-core tests favor the architectural traits of the 265T.

Architecture Differences

Both processors are built on the Arrow Lake architecture and share the same 3 nm process node from TSMC. They use the same transistor count of 17,800 million and the same die size of 243 mm². The codename for the 250K Plus is Arrow Lake Refresh, while the 265T uses Arrow Lake-S.

The core counts differ: the 265T has 20 cores versus 18 on the 250K Plus. This gives the 265T a theoretical core-count advantage, yet the 250K Plus outperforms it in most multi-threaded tests. The explanation lies in clock behavior and power allocation. The 250K Plus has a 4.20 GHz base clock versus 1.50 GHz on the 265T. With a 125 W TDP, the 250K Plus can sustain higher operating frequencies across all cores. The 265T, constrained to 35 W, must reduce clocks aggressively under load despite having more cores.

The cache hierarchy is identical: 192 KB L1 per core, 3 MB L2 per core, and 30 MB shared L3. The memory support is DDR5 in dual-channel mode. The 250K Plus has a memory bandwidth rating of 115.2 GB/s, while the 265T is rated at 102.4 GB/s. The 250K Plus also supports ECC memory, which the 265T lacks.

PCIe connectivity is the same: Gen 5 with 20 lanes from the CPU. The integrated graphics are identical Arc Xe-LPG units with 64 EU. The production status for both is Active.

The release dates differ substantially. The 265T was released on 2025-01-06, while the 250K Plus was released on 2026-03-10, making it the newer design. The multiplier unlock on the 250K Plus allows user-controlled overclocking, while the 265T is locked.

Specification Differences

The two processors differ in several specification fields. The core count differs by 2 cores, with the 265T having 20 and the 250K Plus having 18. Thread counts mirror this at 20 and 18 respectively.

Base clock is the most dramatic difference: 4.20 GHz on the 250K Plus versus 1.50 GHz on the 265T. Boost clock is identical at 5.30 GHz for both.

TDP differs by 90 W: 125 W for the 250K Plus and 35 W for the 265T. This is the largest single specification gap and explains the performance distribution.

Memory bandwidth differs by 12.8 GB/s, with the 250K Plus rated at 115.2 GB/s and the 265T at 102.4 GB/s.

ECC memory support is present on the 250K Plus but absent on the 265T.

The multiplier is unlocked on the 250K Plus and locked on the 265T.

The part numbers differ: SA4UZ for the 250K Plus and SRQCS for the 265T.

The codenames differ: Arrow Lake Refresh for the 250K Plus and Arrow Lake-S for the 265T. The generation field lists Ultra 5 (Arrow Lake) for the 250K Plus and Ultra 7 (Arrow Lake) for the 265T.

The launch MSRP for the Core Ultra 5 250K Plus is $199. The launch MSRP for the Core Ultra 7 265T is $384.

Head-to-Head Benchmarks

The largest win for the Core Ultra 5 250K Plus comes in PassMark extended instructions, where it scores 44565 against 28609, a 55.8% advantage. This test measures SIMD and vectorized instruction throughput, and the 250K Plus demonstrates a clear lead in compute-heavy workloads.

Data compression shows a 53.6% advantage for the 250K Plus: 568721 versus 370158. Random string sorting shows a 55.6% lead: 69090 versus 44400. Find prime numbers shows a 50.9% lead: 486 versus 322. These results indicate the 250K Plus handles algorithmic and data-manipulation tasks with substantially higher throughput.

Data encryption shows a 42% lead for the 250K Plus: 42144 versus 29687. Floating point math shows a 25.3% lead: 162692 versus 129817. Integer math shows a 19.2% lead: 125091 versus 104943. Physics simulation shows a 46.1% lead: 3494 versus 2391.

The Cinebench multicore results are mixed. R15 multicore favors the 250K Plus by 45.9% (4640 vs 3180). R20 multicore favors the 250K Plus by 39.1% (18442 vs 13254). But R23 multicore favors the 265T by 2.2% (31558 vs 30867). This reversal suggests the 265T scales better in the longer R23 workload, possibly due to its additional cores and thermal management over extended runs.

The single-core results are sharply divided. Cinebench R15 singlecore favors the 265T by 26.9% (449 vs 328). Cinebench R23 singlecore favors the 265T by 49.2% (4455 vs 2261). However, PassMark single-thread favors the 250K Plus by 9.7% (4757 vs 4338). The Cinebench single-core tests appear to reward the architectural efficiency of the 265T, while the PassMark single-thread test rewards the higher base clock of the 250K Plus.

PassMark multithread shows a 39.1% lead for the 250K Plus: 51596 versus 37084. This aligns with the R20 multicore result and reinforces the overall multi-threaded dominance of the 250K Plus.

The overall average benchmark score for the 250K Plus is 66855, compared to 47697 for the 265T. The 250K Plus sits at the 93rd percentile of all CPUs, while the 265T sits at the 90th percentile. The nearest rival to the 250K Plus is the AMD EPYC 4465P at 66925, a delta of -0.1%, and the Intel Xeon 6515P at 67006, a delta of -0.2%. The nearest rival to the 265T is the AMD Ryzen 9 PRO 5945 at 47527, a delta of 0.4%, and the AMD Ryzen 9 7900X3D at 47908, a delta of -0.4%.

The 250K Plus delivers its performance at a 125 W TDP with an unlocked multiplier, while the 265T operates at 35 W with a locked multiplier. The data shows a clear trade-off: the 250K Plus favors throughput and flexibility, while the 265T favors power efficiency and single-thread efficiency in specific Cinebench workloads.