Intel Core 5 120 vs Intel Core Ultra 3 205 Comparison

Head-to-Head Benchmarks

The benchmark data paints a decisive picture: the Intel Core Ultra 3 205 wins 16 of 17 recorded comparisons, with the Intel Core 5 120 taking a single victory. The average benchmark score difference is substantial, with the Core Ultra 3 205 recording 31,473 against the Core 5 120's 25,362, a gap that places the two processors 5 percentile points apart (82nd versus 77th percentile among all CPUs).

The Core Ultra 3 205's dominance is most pronounced in PassMark's computationally intensive workloads. In data encryption, it scores 18,772 against 11,131, a 40.7% advantage. Extended instructions show a 36.8% lead (22,578 versus 14,264), while floating point math delivers a 39.6% margin (75,136 versus 45,383). The largest single delta appears in prime number finding, where the Core Ultra 3 205 scores 268 versus 77, a 71.3% gap that indicates a fundamental architectural advantage in integer-heavy iterative workloads.

PassMark multithread performance favors the Core Ultra 3 205 by 28.9% (26,167 versus 18,597), while physics simulation shows a 33.9% lead (2,016 versus 1,333). Random string sorting runs 30.8% faster (31,083 versus 21,499). Single-thread performance also clearly favors the newer part: 4,575 versus 3,595, a 21.4% difference that appears consistently across both PassMark single-thread entries.

Cinebench results show a tighter but still uniform margin. Across R15, R20, and R23, the Core Ultra 3 205 leads by roughly 8% in both single-core and multi-core tests. In R23 multi-core, it scores 19,856 versus 18,255 (8.1% ahead); in R23 single-core, 2,803 versus 2,577 (8.1% ahead). The R15 results mirror this pattern: 2,001 versus 1,840 in multi-core (8% ahead) and 282 versus 259 in single-core (8.2% ahead).

The sole counterpoint comes from PassMark integer math, where the Core 5 120 scores 60,462 against 54,755, a 10.4% advantage. This is the only test where the older architecture outperforms, and the margin is meaningful despite being isolated. Data compression also favors the Core Ultra 3 205 but by a smaller 15.8% (260,651 versus 219,535), suggesting that the Core 5 120's 12 threads provide some resilience in throughput-oriented integer tasks even as the Core Ultra 3 205 wins overall.

The nearest-rival data contextualizes both parts. The Core 5 120 sits within 0.3% of the AMD Ryzen 5 5600X3D (25,365 average score) and within 0.2% of the Intel Core i7-11700KF (25,423). The Core Ultra 3 205 matches the Intel Core 7 240H (31,483) within 0%, and trails the AMD Ryzen 9 5980HX by only 0.1% (31,495). This places the Core Ultra 3 205 in a higher performance tier entirely, not merely a faster sibling.

FAQ

Q: Which processor wins the majority of benchmark comparisons?

A: The Intel Core Ultra 3 205 wins 16 of 17 head-to-head tests. The Core 5 120 wins only PassMark integer math, by 10.4% (60,462 versus 54,755).

Q: How large is the performance gap in Cinebench R23?

A: The Core Ultra 3 205 leads by 8.1% in both multi-core (19,856 versus 18,255) and single-core (2,803 versus 2,577) R23 scores.

Q: Where does the Core Ultra 3 205 show its largest advantage?

A: The biggest delta is in PassMark find prime numbers, where it leads by 71.3% (268 versus 77). Data encryption shows a 40.7% lead, and floating point math shows a 39.6% lead.

Q: Does the Core 5 120 have any meaningful strength?

A: Yes, in PassMark integer math it scores 60,462 versus 54,755, a 10.4% advantage. It also wins PassMark data compression by a narrower margin in relative terms, though the Core Ultra 3 205 still wins that test overall.

Q: How do the two compare in overall CPU percentile ranking?

A: The Core Ultra 3 205 sits at the 82nd percentile of all CPUs, while the Core 5 120 sits at the 77th percentile. Their average benchmark scores are 31,473 and 25,362 respectively.

Q: What do the nearest rival scores indicate about each processor's tier?

A: The Core 5 120 trades blows with the AMD Ryzen 5 5600X3D (0% delta) and Intel Core i5-13400F (0.3% delta). The Core Ultra 3 205 matches the Intel Core 7 240H (0% delta) and sits within 0.1% of the AMD Ryzen 9 5980HX.

The Verdict

The data directs a clear choice for most workloads: the Intel Core Ultra 3 205 is the faster processor across rendering, encryption, physics, sorting, and single-threaded tasks. Its 8.1% lead in Cinebench R23 multi-core and 21.4% lead in PassMark single-thread make it the better option for general productivity, content creation, and daily responsiveness. The 82nd percentile ranking versus 77th confirms a higher placement in the overall performance distribution.

The Intel Core 5 120 retains a niche in integer math, where its 10.4% advantage could matter for specific scientific or financial workloads that stress that operation. Its 12 threads versus 8 also provide a theoretical multitasking edge, though the benchmark results do not show that advantage materializing in multithreaded scores, where the Core Ultra 3 205 leads by 28.9%.

For buyers constrained to the Core 5 120's platform, the performance is competitive with peers like the Ryzen 5 5600X3D and Core i7-11700KF, all within 0.3% average score. But the Core Ultra 3 205 operates in a higher tier, matching the Core 7 240H and Ryzen 9 5980HX. The recorded data favors the Core Ultra 3 205 for essentially every measured scenario except one.

Specification Differences

The two processors diverge on nearly every core specification. The Core 5 120 uses 6 cores and 12 threads, while the Core Ultra 3 205 uses 8 cores and 8 threads. Base clocks differ: 2.50 GHz for the Core 5 120 versus 3.80 GHz for the Core Ultra 3 205. Boost clocks also favor the newer part: 4.50 GHz versus 4.90 GHz. Thermal design power runs 65 W for the Core 5 120 and 57 W for the Core Ultra 3 205, meaning the faster chip also carries a lower TDP.

Sockets and platforms are incompatible. The Core 5 120 fits Intel Socket 1700, while the Core Ultra 3 205 uses Intel Socket 1851. Memory support differs: the Core 5 120 supports DDR4 and DDR5, whereas the Core Ultra 3 205 supports DDR5 only. Both use dual-channel memory buses, but the Core Ultra 3 205 records a memory bandwidth of 102.4 GB/s, a figure not listed for the Core 5 120. PCIe lanes differ as well: the Core 5 120 provides Gen 5 with 16 lanes (CPU only), while the Core Ultra 3 205 provides Gen 5 with 20 lanes (CPU only).

Integrated graphics also differ. The Core 5 120 includes UHD Graphics 730, while the Core Ultra 3 205 includes Arc Xe-LPG Graphics 16EU. Neither processor has an unlocked multiplier, and neither supports ECC memory. Release dates are one day apart: the Core 5 120 launched on 2025-07-30 and the Core Ultra 3 205 on 2025-07-31. The launch MSRP for the Core 5 120 is $211, and for the Core Ultra 3 205 it is $140.

Architecture Differences

The architectural gap is generational. The Core 5 120 uses Raptor Lake architecture (Raptor Lake-R codename) on a 10 nm process fabricated by Intel. The Core Ultra 3 205 uses Arrow Lake architecture (Arrow Lake-S codename) on a 3 nm process fabricated by TSMC. The Core Ultra 3 205 also integrates 17,800 million transistors on a 243 mm² die, while the Core 5 120's transistor count is not recorded, though its die size is 163 mm².

Cache structures differ substantially. The Core 5 120 provides 80 KB of L1 per core, 1.25 MB of L2 per core, and 18 MB of shared L3. The Core Ultra 3 205 provides 192 KB of L1 per core, 3 MB of L2 per core, and 15 MB of shared L3. Despite the smaller L3 pool, the Core Ultra 3 205's larger per-core L1 and L2 caches contribute to its superior single-thread and encryption results. The generation label confirms the divide: Core 5 (Raptor Lake Refresh) versus Ultra 3 (Arrow Lake). The Core Ultra 3 205 belongs to the Core Ultra Series 2, a product family that does not exist for the Core 5 120. Production status for both is Active, and both are desktop market segments.