Intel Core Ultra 7 356H vs Intel Core Ultra 9 285H Comparison

Head-to-Head Benchmarks

The benchmark data splits these two 16-core, 16-thread mobile processors into distinct performance profiles. The Intel Core Ultra 9 285H wins the majority of direct comparisons, taking 12 of 17 head-to-head tests, while the Intel Core Ultra 7 356H claims 5 wins. The margins tell a more nuanced story than the raw win count.

The largest victory for the Ultra 9 285H arrives in Cinebench R23 multicore, where it scores 20781.5 against 18395 for the Ultra 7 356H, a delta of -11.5% from the Ultra 7's perspective. That is the single biggest performance gap recorded in the entire comparison. The same test in single-core shows a smaller but still clear advantage: 2129.5 versus 2040, a 4.2% lead for the Ultra 9. Cinebench R15 multicore also favors the Ultra 9 by 3.9% (3177.5 versus 3055), and R15 single-core goes to the Ultra 9 by 3.2% (313 versus 303).

PassMark single-thread results reinforce the Ultra 9's superiority in lightly threaded work. The Ultra 9 posts 4415 in PassMark single_thread and singlethread (both tests record the same score), while the Ultra 7 manages 4072, a 7.8% deficit. Floating point math also favors the Ultra 9: 109190 versus 103128, a 5.6% edge. Integer math follows with 85922 versus 83111, a 3.3% lead. PassMark multithread is close, 34171 versus 33978, a 0.6% margin for the Ultra 9. Prime number finding goes to the Ultra 9 by 0.9% (330 versus 327).

The Ultra 7 356H counters with its own wins, and one stands out sharply. PassMark physics shows the Ultra 7 at 2895 against 2513 for the Ultra 9, a 15.2% advantage, the largest margin in either direction across the entire benchmark set. Extended instructions also favor the Ultra 7 by 4.1% (27898 versus 26794). Data encryption goes to the Ultra 7 by 0.8% (26345 versus 26140). Data compression and random string sorting are near ties, with the Ultra 7 ahead by 0.1% in both: 336177 versus 335859 and 40990 versus 40931 respectively.

Cinebench R20 presents the closest contests. Multicore scores sit at 12201 for the Ultra 9 and 12153 for the Ultra 7, a 0.4% gap. Single-core shows 1722 versus 1715, also 0.4%. These near-parity results suggest that in certain mixed workloads the two chips are effectively interchangeable, despite the broader trend favoring the Ultra 9.

The average benchmark scores in the database place the Ultra 7 356H at 41215 with a percentile rank of 87 among all CPUs, while the Ultra 9 285H averages 38312 at the 86th percentile. That ordering is counterintuitive given the head-to-head results, and it reflects the differing rival sets around each chip. The Ultra 7's nearest rivals include the AMD Ryzen AI 5 PRO 440 at 41208 (0% delta), the Intel Core Ultra 7 366H at 41263 (-0.1%), the AMD Ryzen 9 5900X at 41376 (-0.4%), and the Intel Core Ultra X7 358H at 40967 (0.6%). The Ultra 9 sits near the Intel Core 9 270H at 38335 (-0.1%), the Intel Core i5-13600HX at 38261 (0.1%), the Intel Xeon w3-2525 at 38392 (-0.2%), and the AMD Ryzen 7 250 at 38221 (0.2%).

The Verdict

The data points to the Intel Core Ultra 9 285H as the stronger processor for raw compute throughput. It wins Cinebench R23 multicore by 11.5%, single-thread PassMark by 7.8%, and floating point math by 5.6%. Those are the workloads that dominate rendering, scientific computing, and general productivity. The 45 W TDP and higher boost clock of 5.40 GHz against 4.70 GHz on the Ultra 7 align with that performance profile.

The Intel Core Ultra 7 356H is not a straightforward downgrade. Its 15.2% win in PassMark physics and 4.1% win in extended instructions indicate that certain specialized workloads run better on the Panther Lake architecture. The physics result is particularly notable because it is the largest margin recorded in any test, and it suggests the Ultra 7 handles simulation-style loads more efficiently. The lower 25 W TDP also implies less power draw, though the database does not include direct power consumption measurements for either chip.

Buyers targeting maximum multicore rendering performance should favor the Ultra 9 285H. The Cinebench R23 multicore spread of 2386.5 points is substantial and reproducible across the recorded runs. Buyers running physics simulations or workloads that leverage extended instruction sets should look at the Ultra 7 356H, where its wins are concentrated. The average benchmark score advantage for the Ultra 7 (41215 versus 38312) is real in the database, but it is driven by the different competition pools each chip is measured against, not by head-to-head superiority.

Where Each One Wins

The Ultra 9 285H dominates rendering and single-thread responsiveness. Cinebench R23 multicore, the most demanding rendering test in the set, shows an 11.5% lead. Single-thread performance across Cinebench R15, R20, R23, and PassMark all favor the Ultra 9, with margins from 0.4% to 7.8%. Floating point math, integer math, and prime number finding all go to the Ultra 9, making it the choice for numerical computation. PassMark multithread also lands with the Ultra 9, though the 0.6% margin is slim enough to be within run-to-run variance.

The Ultra 7 356H wins in physics processing by a wide 15.2% margin, a result that stands out as the most decisive outcome in the entire comparison. Extended instructions give the Ultra 7 a 4.1% edge, which benefits encryption workloads and specialized instruction-heavy code. Data encryption, data compression, and random string sorting all go to the Ultra 7, though the latter two by only 0.1%. These wins cluster around memory and data movement tasks rather than pure arithmetic throughput.

The Cinebench R20 results are effectively tied, with both chips within 0.4% in multicore and single-core. That parity zone matters for buyers who run mixed workloads that blend memory access, cache utilization, and moderate thread counts. Neither chip holds a decisive edge in that middle ground.

FAQ

Q: Which processor is faster in Cinebench R23 multicore?

A: The Intel Core Ultra 9 285H scores 20781.5 versus 18395 for the Intel Core Ultra 7 356H, a lead of 11.5%.

Q: How large is the single-thread performance gap?

A: PassMark single_thread shows the Ultra 9 at 4415 against 4072 for the Ultra 7, a 7.8% advantage. Cinebench R23 single-core shows a smaller 4.2% gap (2129.5 versus 2040).

Q: Does the Ultra 7 356H win any benchmark by a large margin?

A: Yes, PassMark physics goes to the Ultra 7 by 15.2% (2895 versus 2513), the largest margin in either direction in the entire comparison.

Q: Are there any benchmarks where the two processors are nearly equal?

A: Cinebench R20 multicore and single-core are within 0.4%. PassMark multithread is within 0.6%, and data compression and random string sorting are within 0.1%.

Q: What is the average benchmark score for each processor?

A: The Ultra 7 356H averages 41215 across the database, while the Ultra 9 285H averages 38312. The Ultra 7 also holds the 87th percentile versus the 86th for the Ultra 9.

Q: What are the closest rival processors to each chip?

A: The Ultra 7 356H sits within 0.6% of the AMD Ryzen AI 5 PRO 440, Intel Core Ultra 7 366H, AMD Ryzen 9 5900X, and Intel Core Ultra X7 358H. The Ultra 9 285H sits within 0.2% of the Intel Core 9 270H, Intel Core i5-13600HX, Intel Xeon w3-2525, and AMD Ryzen 7 250.

Architecture Differences

The two processors come from different Intel architectures and foundries. The Intel Core Ultra 7 356H uses Panther Lake architecture on a 3 nm process fabricated by Intel, while the Intel Core Ultra 9 285H uses Arrow Lake architecture on a 3 nm process fabricated by TSMC. Both are 16-core, 16-thread designs with no hyperthreading, and both belong to mobile market segments.

Clock speeds differ substantially. The Ultra 7 356H runs a 1.90 GHz base clock and 4.70 GHz boost clock. The Ultra 9 285H runs a 2.90 GHz base clock and 5.40 GHz boost clock. Thermal design power also differs, with the Ultra 7 rated at 25 W and the Ultra 9 at 45 W, which explains the Ultra 9's higher sustained clock potential.

Cache layouts diverge in the L2 and L3 tiers. Both chips use 192 KB of L1 cache per core. The Ultra 7 allocates 2.5 MB of L2 per core and 18 MB of shared L3 cache. The Ultra 9 allocates 3 MB of L2 per core and 24 MB of shared L3 cache, giving it a 6 MB L3 advantage and a larger per-core L2 allocation.

Memory support is similar on the surface: both support DDR5 and LPDDR5X with dual-channel memory buses. Memory bandwidth differs, however. The Ultra 7 delivers 115.2 GB/s, while the Ultra 9 delivers 102.4 GB/s, a 12.8 GB/s advantage for the Ultra 7. ECC memory support also separates the two: the Ultra 9 supports ECC, while the Ultra 7 does not.

PCIe connectivity differs in lane count. The Ultra 7 offers Gen 5 with 12 lanes (CPU only), while the Ultra 9 offers Gen 5 with 8 lanes (CPU only), a four-lane advantage for the Ultra 7. Integrated graphics also differ: the Ultra 7 uses Intel Xe3 Graphics, while the Ultra 9 uses Arc Graphics 140T.

Sockets and release timing differ as well. The Ultra 7 uses Intel BGA 2540 and was released on 2025-01-04, while the Ultra 9 uses Intel BGA 2049 and was released on 2025-01-12. The Ultra 9 carries a launch MSRP of $651; the Ultra 7 has no listed launch MSRP. Both are active production parts with locked multipliers.