Intel Core 5 221E vs Intel Core Ultra 7 265KF Comparison
Intel Core 5 221E
Core Ultra 7 265KF
PERFORMANCE BENCHMARKS
Analysis: Intel Core 5 221E vs Intel Core Ultra 7 265KF
Head-to-Head Benchmarks
The data is unambiguous: the Intel Core Ultra 7 265KF wins every single benchmark in the comparison, 17 wins to 0. The largest margins appear in extended instruction workloads, where the Core Ultra 7 265KF leads by 66.6%, scoring 54513 versus 18216 in Passmark extended instructions. Data encryption shows a 60.2% gap, with the Core Ultra 7 265KF posting 48198 against the Core 5 221E's 19205.
Cinebench results tell a consistent story across all versions. In Cinebench R23 multi-core, the Core Ultra 7 265KF scores 49736, which is 47.9% ahead of the Core 5 221E's 25933. The single-core R23 result shows a similar 47.9% delta, with scores of 7021 versus 3661. This same 47.9% delta repeats across Cinebench R15, R20, and R23 for both single and multi-core tests, indicating a uniform performance advantage rather than workload-specific scaling.
The smallest margins appear in integer math and single-thread Passmark tests. The Core Ultra 7 265KF leads integer math by 17.8%, scoring 143351 versus 117813. Passmark single-thread shows a 15.8% advantage, with 4928 against 4147. These narrower gaps suggest that the Core 5 221E's architecture remains competitive in scalar integer workloads, even though it loses decisively elsewhere.
Floating point math shows a 58.3% advantage for the Core Ultra 7 265KF, scoring 189431 versus 79028. Random string sorting shows a 52.7% gap, with 79735 against 37686. Data compression shows a 51.4% difference, with 666589 versus 324285. Prime number finding shows a 64.4% gap, with 486 against 173. Physics simulation shows a 38.6% difference, with 3633 versus 2230.
The average benchmark score confirms the overall positioning: the Core Ultra 7 265KF averages 71910, while the Core 5 221E averages 40144. The percentile data reinforces this, with the Core Ultra 7 265KF sitting at the 94th percentile of all CPUs, while the Core 5 221E sits at the 87th percentile.
The Verdict
The benchmark data indicates a decisive performance hierarchy. The Intel Core Ultra 7 265KF is the superior processor in every measured workload, with margins ranging from 15.8% to 66.6% depending on the test. The Core 5 221E offers no single benchmark victory, making it difficult to recommend for performance-sensitive applications.
Users who require maximum multi-core throughput, heavy encryption, floating point math, or extended instruction set performance should select the Core Ultra 7 265KF. Its 47.9% advantage across all Cinebench versions represents a substantial generational improvement in rendering and content creation workloads. The 66.6% lead in extended instructions makes it particularly suitable for workloads leveraging AVX-512 or similar instruction sets.
The Core 5 221E does offer a lower 65 TDP compared to the 125 TDP of the Core Ultra 7 265KF, which may matter for thermally constrained builds. It also supports ECC memory, a feature absent from the Core Ultra 7 265KF. Users prioritizing error-correcting memory or lower power draw might consider the Core 5 221E despite its performance deficit.
The nearest rival data places the Core Ultra 7 265KF alongside AMD Ryzen 7 8840HX with a 0.2% delta, and Intel Xeon 6517P with a 0.6% delta. The Core 5 221E sits near AMD Ryzen 7 7700 with a 0.2% delta and AMD Ryzen AI 9 365 with a 0.2% delta. This places the Core Ultra 7 265KF in a higher performance tier entirely, consistent with its benchmark wins.
FAQ
Q: Which processor has the higher Cinebench R23 multi-core score?
A: The Intel Core Ultra 7 265KF scores 49736, which is 47.9% higher than the Intel Core 5 221E's 25933.
Q: Does the Core 5 221E win any benchmark at all?
A: No. The head-to-head data shows 17 wins for the Core Ultra 7 265KF and 0 wins for the Core 5 221E across all tested workloads.
Q: What is the smallest performance gap between the two processors?
A: The smallest gap is 15.8% in Passmark single-thread testing, where the Core Ultra 7 265KF scores 4928 versus 4147 for the Core 5 221E.
Q: How does the Core Ultra 7 265KF compare to its nearest rival?
A: The Core Ultra 7 265KF averages 71910, which is 0.2% ahead of AMD Ryzen 7 8840HX and 0.8% ahead of Intel Xeon Platinum 8270. It trails the Intel Xeon 6724P by 0.7%.
Q: Which processor supports ECC memory?
A: The Intel Core 5 221E supports ECC memory, while the Intel Core Ultra 7 265KF does not.
Q: What are the production statuses of these processors?
A: Both processors are listed as Active in production status. The Core 5 221E was released on 2025-01-12, while the Core Ultra 7 265KF was released on 2024-10-23.
Specification Differences
The two processors differ on nearly every specification field. The Core 5 221E has 14 cores and 20 threads, while the Core Ultra 7 265KF has 20 cores and 20 threads. Base clocks differ substantially, with the Core 5 221E at 2.70 GHz and the Core Ultra 7 265KF at 3.90 GHz. Boost clocks show a smaller gap, with 5.20 GHz versus 5.50 GHz.
Thermal design power differs by 60 watts, with the Core 5 221E rated at 65 TDP and the Core Ultra 7 265KF at 125 TDP. The sockets are incompatible, with the Core 5 221E using Intel Socket 1700 and the Core Ultra 7 265KF using Intel Socket 1851. The Core 5 221E supports both DDR4 and DDR5 memory, while the Core Ultra 7 265KF supports DDR5 only. Memory bandwidth also differs, with 89.6 GB/s for the Core 5 221E versus 102.4 GB/s for the Core Ultra 7 265KF.
PCIe lane counts differ, with the Core 5 221E providing Gen 5 with 16 lanes, while the Core Ultra 7 265KF provides Gen 5 with 20 lanes. Integrated graphics are present on the Core 5 221E with UHD Graphics 730, while the Core Ultra 7 265KF has no integrated graphics. The multiplier is locked on the Core 5 221E but unlocked on the Core Ultra 7 265KF. The launch MSRP for the Core 5 221E is $232, while the Core Ultra 7 265KF has a launch MSRP of $379.
Architecture Differences
The architecture gap is substantial. The Core 5 221E uses Bartlett Lake architecture on a 10 nm process node fabricated by Intel, with a die size of 257 mm². The Core Ultra 7 265KF uses Arrow Lake architecture on a 3 nm process node fabricated by TSMC, with a die size of 243 mm² and 17,800 million transistors. The Core 5 221E has no transistor count listed.
Cache configurations differ significantly. The Core 5 221E has 80 KB L1 cache per core, 2 MB L2 cache per core, and 24 MB shared L3 cache. The Core Ultra 7 265KF has 192 KB L1 cache per core, 3 MB L2 cache per core, and 30 MB shared L3 cache. The larger per-core caches on the Core Ultra 7 265KF contribute to its single-thread advantage.
The Core Ultra 7 265KF belongs to the Core Ultra Series 2 generation, while the Core 5 221E is a Core 5 Bartlett Lake part. The market segment for both is Desktop. The Core 5 221E supports ECC memory, which is absent on the Core Ultra 7 265KF. The foundry difference, Intel versus TSMC, represents a major manufacturing strategy shift between the two designs.
Where Each One Wins
The Core Ultra 7 265KF wins in every measured category, but the margin varies by workload type. For single-threaded responsiveness, the Core Ultra 7 265KF leads by 15.8% in Passmark single-thread, the smallest advantage. This suggests the Core 5 221E retains reasonable everyday responsiveness despite its older architecture.
For integer math workloads, the Core Ultra 7 265KF leads by 17.8%, indicating the Core 5 221E remains competitive in traditional CPU arithmetic. However, floating point math shows a 58.3% gap, revealing a major weakness in the Core 5 221E for scientific and simulation workloads.
For encryption and extended instructions, the Core Ultra 7 265KF dominates with 60.2% and 66.6% leads respectively. These workloads clearly favor the newer architecture and larger cache configuration. The Core 5 221E cannot match the Core Ultra 7 265KF in any security or cryptography application.
Multi-threaded workloads show consistent 47.9% gaps across Cinebench versions, indicating the 20-core Core Ultra 7 265KF scales better than the 14-core Core 5 221E despite having the same thread count. Data compression shows a 51.4% gap, while random string sorting shows a 52.7% gap, both favoring the Core Ultra 7 265KF.
The Core 5 221E's only potential advantages are qualitative rather than benchmark-driven: ECC memory support, a 65 TDP versus 125 TDP, and integrated UHD Graphics 730. For users requiring error-correcting memory or a lower thermal envelope, the Core 5 221E offers those features, but it sacrifices significant performance in every measured workload.