Intel Core 5 223PE vs Intel Core Ultra 7 265K Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive overall victory for the Intel Core Ultra 7 265K, which wins 16 of the 17 head-to-head comparisons. The only exception is a striking outlier in Cinebench R23 single-core, where the Intel Core 5 223PE takes the win by a margin of 84.9%. That result is unexpected given the rest of the benchmark suite, and the 223PE's score of 3734 in that test compares directly to the 265K's 2020.

Looking at the multi-threaded workloads, the Core Ultra 7 265K dominates consistently. In Cinebench R15 multi-core, it scores 5020 against 2666, a 46.9% advantage. The same 46.9% delta appears in Cinebench R20 multi-core, where the 265K records 20918 versus 11111. Cinebench R23 multi-core narrows the gap slightly to 26.2%, with scores of 35850 and 26455. The 265K's PassMark multi-thread score of 58594 is 46.9% higher than the 223PE's 31124.

Single-core performance outside the anomalous R23 result favors the 265K. Cinebench R15 single-core shows 708 versus 376, and Cinebench R20 single-core shows 2953 versus 1568, both with a 46.9% delta. PassMark single-thread results are closer, with the 265K at 4928 and the 223PE at 4219, a 14.4% difference.

The specialized PassMark workloads reveal the largest margins. Data encryption sees the 265K score 48246 against the 223PE's 18448, a 61.8% lead. Find prime numbers shows a 67.6% gap, with 491 versus 159. Floating point math favors the 265K by 59.7% (189629 vs 76468), and random string sorting favors it by 55.1% (79752 vs 35798). Extended instructions go to the 265K by 54.6% (54333 vs 24672), while data compression shows a 47.9% gap (665554 vs 346623). Integer math is the closest PassMark workload at 30.3% (143242 vs 99819), and physics shows a 33.2% gap (3731 vs 2493).

The average benchmark score reinforces the hierarchy: the 265K averages 70879 across all benchmarks, while the 223PE averages 40585. The 265K sits in the 94th percentile of all CPUs in the database, compared to the 223PE's 87th percentile. The 265K's nearest rivals are the Intel Xeon 6511P (0.2% lower), the Intel Xeon Platinum 8270 (0.7% lower), and it leads the Intel Core i7-14700KF by 1% and the AMD Ryzen 7 9700F by 1.3%. The 223PE's closest competitors include the Intel Core 7 253PE at just 0.1% higher, the Intel Xeon 6357P at 0.1% lower, and the AMD Ryzen AI 5 PRO 435G at 0.3% lower.

Architecture Differences

The two processors represent fundamentally different designs from Intel. The Core 5 223PE is built on Bartlett Lake, uses Intel's 10 nm process, and is fabricated by Intel itself. The Core Ultra 7 265K uses Arrow Lake architecture with the Arrow Lake-S codename, moves to a 3 nm process, and is fabricated by TSMC. The 265K's transistor count is recorded at 17,800 million on a 243 mm² die, while the database lists no transistor or die size figures for the 223PE.

Core counts differ sharply. The 223PE offers 8 cores and 16 threads, indicating hyper-threading support. The 265K provides 20 cores and 20 threads, with no hyper-threading. The 265K has a higher base clock at 3.90 GHz versus 2.90 GHz, and a higher boost clock at 5.50 GHz versus 5.20 GHz. The 223PE operates at a 65 W TDP, while the 265K is rated at 125 W.

Cache hierarchies also diverge. The 223PE has 80 KB of L1 per core, 2 MB of L2 per core, and 24 MB of shared L3. The 265K has 192 KB of L1 per core, 3 MB of L2 per core, and 30 MB of shared L3. Memory support sees the 223PE accept both DDR4 and DDR5, while the 265K is DDR5-only. Both use dual-channel memory buses, but the 265K achieves 102.4 GB/s bandwidth versus the 223PE's 89.6 GB/s. Both support ECC memory.

PCIe connectivity favors the 265K with Gen 5 and 20 CPU lanes; the 223PE provides Gen 5 with 16 CPU lanes. Integrated graphics differ as well: the 223PE uses UHD Graphics 730, while the 265K uses Arc Xe-LPG Graphics 64EU. The 265K has an unlocked multiplier, whereas the 223PE does not. Sockets are not interchangeable, with the 223PE on Intel Socket 1700 and the 265K on Intel Socket 1851. The 223PE carries part number SA4QF and the 265K carries SRQCW.

FAQ

Q: Which processor wins the majority of benchmark comparisons?

A: The Intel Core Ultra 7 265K wins 16 of the 17 recorded head-to-head tests, with the only loss coming in Cinebench R23 single-core.

Q: What is the largest performance gap between the two?

A: PassMark data encryption shows the biggest delta at 61.8% in favor of the 265K, followed by floating point math at 59.7% and random string sorting at 55.1%.

Q: How do the core and thread counts compare?

A: The 223PE has 8 cores and 16 threads, while the 265K has 20 cores and 20 threads. The 265K does not use hyper-threading despite its higher thread count.

Q: What is the release timeline for each processor?

A: The 265K was released on 2024-10-23, while the 223PE was released on 2026-03-08. Both are currently listed as active in production.

Q: Do both processors support ECC memory?

A: Yes, both the 223PE and the 265K list ECC memory support as enabled.

Q: Which processor has the higher average benchmark score?

A: The 265K averages 70879 across all benchmarks, compared to the 223PE's 40585. The 265K also ranks in the 94th percentile of all CPUs, versus the 87th percentile for the 223PE.

The Verdict

The data makes the choice straightforward for workloads that scale across cores. The Core Ultra 7 265K leads every multi-threaded benchmark in the database, often by margins between 26.2% and 67.6%. Its 20 cores, 3 nm process, and higher memory bandwidth collectively explain its dominance in compression, encryption, and floating point math. The 265K also holds the edge in conventional single-thread tests, with a 14.4% lead in PassMark single-thread and matching 46.9% leads in Cinebench R15 and R20 single-core.

The Core 5 223PE's lone win in Cinebench R23 single-core, with an 84.9% margin, is difficult to reconcile with the rest of the data. That test result does not carry over to any other benchmark, and the 223PE trails in every other single-thread metric. Users should treat that specific score as an isolated data point rather than a general indicator of single-thread superiority.

The 223PE remains a capable desktop processor with 16 threads, a 5.20 GHz boost clock, and a 65 W TDP. Its support for both DDR4 and DDR5 memory provides flexibility for existing platforms. But the 265K's 30 MB L3 cache, 102.4 GB/s memory bandwidth, and wider PCIe allocation make it the stronger choice for memory-heavy and I/O-heavy tasks.

For buyers prioritizing raw throughput, the 265K is the clear selection. For those constrained by power or platform compatibility, the 223PE offers a lower TDP and broader memory options, but the benchmark data shows it sacrifices significant performance in nearly every measured workload.

Specification Differences

| Specification | Intel Core 5 223PE | Intel Core Ultra 7 265K |

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

| Cores | 8 | 20 |

| Threads | 16 | 20 |

| Base clock | 2.90 GHz | 3.90 GHz |

| Boost clock | 5.20 GHz | 5.50 GHz |

| TDP | 65 W | 125 W |

| Socket | Intel Socket 1700 | Intel Socket 1851 |

| Codename | Bartlett Lake | Arrow Lake-S |

| Process node | 10 nm | 3 nm |

| Foundry | Intel | TSMC |

| Transistors | Not listed | 17,800 million |

| Die size | Not listed | 243 mm² |

| L1 cache | 80 KB per core | 192 KB per core |

| L2 cache | 2 MB per core | 3 MB per core |

| L3 cache | 24 MB shared | 30 MB shared |

| Memory support | DDR4, DDR5 | DDR5 |

| Memory bandwidth | 89.6 GB/s | 102.4 GB/s |

| PCIe | Gen 5, 16 lanes | Gen 5, 20 lanes |

| Integrated graphics | UHD Graphics 730 | Arc Xe-LPG Graphics 64EU |

| Multiplier unlocked | No | Yes |

| Release date | 2026-03-08 | 2024-10-23 |

| Launch MSRP | $232 | $394 |