Intel Core Ultra 5 250KF Plus vs Intel Core Ultra 7 265 Comparison

The Intel Core Ultra 5 250KF Plus and the Intel Core Ultra 7 265 are both active desktop processors from Intel’s Core Ultra Series 2, sharing the same 3 nm TSMC process node and identical 243 mm² die size. Despite the Ultra 7’s higher core count and typical tier positioning, benchmark data reveals a surprising reversal: the Ultra 5 250KF Plus wins 15 of 17 head-to-head comparisons, including every Cinebench test and the vast majority of PassMark workloads. The Ultra 7 265 counters with decisive wins in only two math-heavy PassMark tests. Both chips sit at the 93rd percentile of all CPUs, yet their average benchmark scores diverge: 66,159 for the Ultra 5 versus 64,640 for the Ultra 7. This analysis breaks down where each processor claims victory, the architectural and specification gaps that explain the results, and what the numbers mean for workload selection.

Where Each One Wins

The Intel Core Ultra 5 250KF Plus establishes dominance across nearly every benchmark category, making it the default choice for mixed and single-threaded workloads. Its winning margin in Cinebench is consistent but narrow—1.2% in R15, R23, and single-core variants—while the R20 results are anomalous and extreme, showing a 186.2% multicore and 186.4% single-core advantage. Beyond Cinebench, the Ultra 5 wins PassMark data compression (5.8% ahead), data encryption (2.1%), extended instructions (3.4%), prime number finding (8.1%), multithread (0.9%), physics (8.9%), random string sorting (5.3%), and single-thread (0.2%). These wins span integer-heavy, encryption, and sorting workloads, indicating broad general-purpose superiority.

The Intel Core Ultra 7 265 wins only two benchmarks, both in PassMark: floating-point math and integer math. Its floating-point score of 172,776 beats the Ultra 5’s 159,824 by 7.5%, while its integer math score of 134,773 beats 123,030 by 8.7%. These are significant margins and suggest the Ultra 7’s additional cores provide meaningful throughput in pure arithmetic computations. However, the Ultra 5’s wins in physics (8.9%) and prime number finding (8.1%)—both traditionally compute-intensive—show that the Ultra 7’s advantage does not extend to all mathematical workloads. For users prioritizing raw floating-point or integer crunching, the Ultra 7 is the clear pick; for everything else, the Ultra 5 leads.

Architecture Differences

Both processors are built on the Arrow Lake architecture family, but they represent different generations within it. The Ultra 5 250KF Plus carries the codename Arrow Lake Refresh, while the Ultra 7 265 uses the original Arrow Lake-S design. The Ultra 5’s generation field lists “Ultra 5 (Arrow Lake)” and the Ultra 7’s lists “Ultra 7 (Arrow Lake),” confirming they share the same fundamental microarchitecture despite the Refresh designation. Both use TSMC’s 3 nm process node, integrate 17,800 million transistors on a 243 mm² die, and feature identical cache hierarchies: 192 KB L1 per core, 3 MB L2 per core, and 30 MB shared L3.

The core configurations differ meaningfully. The Ultra 5 has 18 cores and 18 threads, while the Ultra 7 has 20 cores and 20 threads—neither supports simultaneous multithreading. The Ultra 7’s two additional cores likely explain its wins in floating-point and integer math, where parallel throughput scales with core count. Clock speeds tell a different story: the Ultra 5 has a base clock of 4.20 GHz versus the Ultra 7’s 2.40 GHz, while both boost to 5.30 GHz. The Ultra 5’s much higher base clock gives it a significant advantage in lightly threaded and burst workloads, which is consistent with its single-thread wins and overall benchmark dominance. The Ultra 5 also features an unlocked multiplier, whereas the Ultra 7 is locked, allowing overclocking headroom on the former.

Memory and feature support diverge as well. The Ultra 5 supports ECC memory, while the Ultra 7 does not. Memory bandwidth differs: the Ultra 5 offers 115.2 GB/s versus the Ultra 7’s 102.4 GB/s, both on dual-channel DDR5. Integrated graphics are absent on the Ultra 5 (listed as N/A), while the Ultra 7 includes Arc Xe-LPG Graphics 32EU. Both use Gen 5 PCIe with 20 CPU lanes and the Intel Socket 1851. The Ultra 5’s TDP is 125 W, nearly double the Ultra 7’s 65 W, which explains its higher base clock and sustained performance potential. The Ultra 5 was released on 2026-03-10, while the Ultra 7 launched earlier on 2025-01-06.

Head-to-Head Benchmarks

The Cinebench results are the most striking. In R15 multicore, the Ultra 5 scores 4,305 versus 4,255 for the Ultra 7, a 1.2% edge. R15 single-core shows a similar 1.2% margin: 607 versus 600. R23 multicore follows the same pattern—42,718 versus 42,216, again 1.2%—and R23 single-core delivers 6,030 versus 5,960, also 1.2%. The R20 results, however, are outliers that cannot be ignored. The Ultra 5 scores 17,941 in multicore and 2,532 in single-core, while the Ultra 7 scores 6,268 and 884 respectively, yielding deltas of 186.2% and 186.4%. These figures suggest either a benchmark anomaly or a fundamental difference in how the two chips handle the R20 workload, but regardless, the data shows the Ultra 5’s superiority in that test.

PassMark results paint a more nuanced picture. The Ultra 5 wins data compression (553,155 versus 522,983, +5.8%), data encryption (41,292 versus 40,456, +2.1%), extended instructions (42,880 versus 41,478, +3.4%), and find prime numbers (452 versus 418, +8.1%). Its multithread score is 50,146 versus 49,682 (+0.9%), and physics shows 3,183 versus 2,923 (+8.9%). Random string sorting goes to the Ultra 5 at 67,209 versus 63,833 (+5.3%). Single-thread scores are nearly identical: 4,698 versus 4,689, a 0.2% edge for the Ultra 5. The Ultra 7’s two wins are decisive: floating-point math at 172,776 versus 159,824 (−7.5% for the Ultra 5) and integer math at 134,773 versus 123,030 (−8.7%). These two benchmarks demonstrate that the Ultra 7’s extra cores translate to real performance gains in pure arithmetic, even if they cannot overcome the Ultra 5’s advantages elsewhere.

Specification Differences

The two processors differ in several key specification fields. Core count: the Ultra 5 has 18 cores, the Ultra 7 has 20. Threads match cores on both: 18 and 20 respectively. Base clock is a major divergence—4.20 GHz for the Ultra 5 versus 2.40 GHz for the Ultra 7—while boost clock is identical at 5.30 GHz. TDP differs substantially: 125 W for the Ultra 5 versus 65 W for the Ultra 7. The Ultra 5 has an unlocked multiplier; the Ultra 7 is locked. ECC memory support is present on the Ultra 5 but absent on the Ultra 7. Memory bandwidth is 115.2 GB/s for the Ultra 5 versus 102.4 GB/s for the Ultra 7. Integrated graphics are N/A on the Ultra 5, while the Ultra 7 includes Arc Xe-LPG Graphics 32EU. The codenames differ—Arrow Lake Refresh for the Ultra 5, Arrow Lake-S for the Ultra 7—as do the part numbers (SA4V3 versus SRQCX). Release dates are 2026-03-10 for the Ultra 5 and 2025-01-06 for the Ultra 7. The launch MSRP is $184 for the Ultra 5 and $394 for the Ultra 7.

FAQ

Q: Which processor has more cores, and does that translate to more benchmark wins?

A: The Intel Core Ultra 7 265 has 20 cores versus 18 for the Ultra 5 250KF Plus. However, the Ultra 5 wins 15 of 17 head-to-head benchmarks, so the extra cores do not yield overall superiority. The Ultra 7’s two wins are in PassMark floating-point and integer math, where its additional cores provide a 7.5% and 8.7% advantage, respectively.

Q: Why does the Ultra 5 250KF Plus have such a large lead in Cinebench R20?

A: In Cinebench R20 multicore, the Ultra 5 scores 17,941 versus 6,268 for the Ultra 7, a delta of 186.2%. Single-core shows 2,532 versus 884, a 186.4% delta. These margins are far larger than the 1.2% deltas seen in R15 and R23, suggesting a workload-specific anomaly, but the data consistently favors the Ultra 5.

Q: What is the difference in base clock speeds, and how does that affect performance?

A: The Ultra 5 has a base clock of 4.20 GHz, while the Ultra 7 has a base clock of 2.40 GHz. Both boost to 5.30 GHz. The Ultra 5’s higher base clock contributes to its wins in single-threaded tests, such as Cinebench R23 single-core (6,030 versus 5,960) and PassMark single-thread (4,698 versus 4,689).

Q: Does either processor support ECC memory?

A: Yes, the Intel Core Ultra 5 250KF Plus supports ECC memory. The Intel Core Ultra 7 265 does not support ECC memory. This is a key differentiator for users requiring error-correcting memory in workstation or server-like environments.

Q: Which processor has integrated graphics?

A: The Intel Core Ultra 7 265 includes Arc Xe-LPG Graphics 32EU. The Intel Core Ultra 5 250KF Plus has no integrated graphics, listed as N/A. This means the Ultra 5 requires a discrete GPU for display output, while the Ultra 7 can run without one.

Q: How do their average benchmark scores compare, and where do they rank among all CPUs?

A: The Ultra 5 250KF Plus has an average benchmark score of 66,159, while the Ultra 7 265 averages 64,640. Both are at the 93rd percentile of all CPUs. The Ultra 5’s nearest rival is the Intel Core 9 273PQE (0.1% delta), while the Ultra 7’s nearest rival is the AMD EPYC 4464P (−0.3% delta).