Intel Core Ultra 5 225T vs Intel Core Ultra 9 285T Comparison

FAQ

Q: Which processor has the higher core count?

A: The Intel Core Ultra 9 285T has 24 cores and 24 threads, while the Intel Core Ultra 5 225T has 10 cores and 10 threads. That is a 14-core difference between the two.

Q: How do the two compare in single-threaded performance?

A: The Core Ultra 9 285T leads in PassMark single-thread testing with a score of 4576 versus 4348 for the Core Ultra 5 225T, a 5% advantage. In Cinebench R23 single-core, the Ultra 9 scores 4739 against 3101, a 34.6% lead.

Q: What is the difference in multicore workload results?

A: The Core Ultra 9 285T dominates multicore tests. In Cinebench R23 multicore, it scores 33573 versus 21971 for the Ultra 5, a 34.6% gap. PassMark multithread shows 39931 against 25358, a 36.5% difference.

Q: Are the two processors built on the same architecture?

A: Yes, both use the Arrow Lake architecture and the Arrow Lake-S codename, fabricated on a TSMC 3 nm process with 17,800 million transistors and a 243 mm² die size.

Q: Do both support the same memory type?

A: Both support DDR5 memory with dual-channel bus and identical memory bandwidth of 102.4 GB/s. However, only the Core Ultra 9 285T supports ECC memory; the Core Ultra 5 225T does not.

Q: What do the overall benchmark percentiles indicate?

A: The Core Ultra 9 285T sits at the 91st percentile among all CPUs, while the Core Ultra 5 225T sits at the 82nd percentile. The average benchmark score for the Ultra 9 is 51310 versus 30468 for the Ultra 5.

Architecture Differences

The Core Ultra 5 225T and Core Ultra 9 285T share the Arrow Lake architecture, specifically the Arrow Lake-S codename, and both are manufactured by TSMC on a 3 nm process. The transistor count is identical at 17,800 million, and the die size is the same at 243 mm². Both use the Intel Socket 1851 and belong to the Core Ultra Series 2 generation.

The core configuration is the primary architectural divergence. The Ultra 5 225T provides 10 cores and 10 threads, while the Ultra 9 285T provides 24 cores and 24 threads. This means the Ultra 9 has no hyperthreading-like extra threads beyond its physical cores, but it does have significantly more physical execution units.

Cache allocation differs substantially. Both processors have 192 KB of L1 cache per core and 3 MB of L2 cache per core. The shared L3 cache is 20 MB on the Ultra 5 225T and 36 MB on the Ultra 9 285T, a 16 MB difference that benefits the larger chip in cache-heavy workloads.

The integrated graphics also differ. The Ultra 5 225T uses Arc Xe-LPG Graphics with 16 execution units, while the Ultra 9 285T uses Arc Xe-LPG Graphics with 64 execution units. This quadruples the graphics execution resources on the Ultra 9.

ECC memory support is another distinction. The Ultra 9 285T supports ECC memory, while the Ultra 5 225T does not. Both processors support DDR5 memory on a dual-channel bus with the same 102.4 GB/s bandwidth.

Clock speeds show a notable trade-off. The Ultra 5 225T has a base clock of 2.50 GHz and a boost clock of 4.90 GHz. The Ultra 9 285T has a lower base clock of 1.40 GHz but a higher boost clock of 5.40 GHz. The thermal design power differs as well: the Ultra 5 is rated at 65 watts, while the Ultra 9 is rated at 35 watts, despite having more cores and a higher boost frequency.

Both processors use PCIe Gen 5 with 20 lanes from the CPU, and neither has an unlocked multiplier. The release dates are close, with the Ultra 5 released on 2024-12-31 and the Ultra 9 on 2025-01-06.

Head-to-Head Benchmarks

The benchmark data shows a clean sweep: the Intel Core Ultra 9 285T wins all 17 recorded head-to-head comparisons. The margins vary widely, from a modest 5% single-thread advantage to a massive 55% gap in integer math.

In Cinebench R15 multicore, the Ultra 9 scores 3384 against 2214 for the Ultra 5, a 34.6% delta. The single-core R15 result shows 477 versus 312, also a 34.6% difference. Cinebench R20 multicore delivers 14100 versus 9227, and single-core gives 1990 versus 1302, both at the same 34.6% margin. Cinebench R23 follows the pattern: multicore at 33573 versus 21971 and single-core at 4739 versus 3101, again 34.6%.

The PassMark suite reveals where the core advantage matters most. Integer math shows the largest relative gap: the Ultra 9 scores 132433 versus 59543 for the Ultra 5, a 55% deficit for the smaller chip. Floating-point math follows with 137923 versus 82751, a 40% gap. Data encryption shows 32061 versus 18289, a 43% difference. Data compression delivers 384140 versus 233998, a 39.1% gap. Random string sorting produces 47695 versus 28774, a 39.7% difference.

Smaller but still decisive margins appear in other tests. Extended instructions show 27477 versus 20083, a 26.9% gap. Physics scores 2842 versus 2053, a 27.8% difference. Find prime numbers yields 345 versus 284, a 17.7% gap. The closest contest is PassMark single-thread, where the Ultra 9 scores 4576 against 4348, just a 5% lead.

The average benchmark scores tell the broad story: the Ultra 9 285T averages 51310, while the Ultra 5 225T averages 30468. This places the Ultra 9 at the 91st percentile and the Ultra 5 at the 82nd percentile. The nearest rivals for the Ultra 9 include the Intel Core i9-14900T at 51015 (0.6% behind) and the Intel Core i9-13900F at 51730 (0.8% ahead). The Ultra 5 sits close to the Intel Core i9-11980HK at 30422 (0.2% behind) and the AMD Ryzen 5 7640HS at 30390 (0.3% behind).

Specification Differences

The processors share many specifications: both use the Arrow Lake architecture, TSMC 3 nm process, 17,800 million transistors, 243 mm² die size, Intel Socket 1851, DDR5 memory support, dual-channel bus, 102.4 GB/s bandwidth, PCIe Gen 5 with 20 lanes, and neither has an unlocked multiplier.

The differences are concentrated in specific fields. Core count differs: 10 cores and 10 threads for the Ultra 5 versus 24 cores and 24 threads for the Ultra 9. Base clock differs: 2.50 GHz versus 1.40 GHz. Boost clock differs: 4.90 GHz versus 5.40 GHz. TDP differs: 65 watts versus 35 watts. L3 cache differs: 20 MB shared versus 36 MB shared. ECC memory support differs: not supported on the Ultra 5, supported on the Ultra 9. Integrated graphics differ: 16 execution units versus 64 execution units. Part numbers differ: unknown for the Ultra 5, SRQD3 for the Ultra 9. Release dates differ: 2024-12-31 versus 2025-01-06.

The Verdict

The data indicates a clear hierarchy. The Intel Core Ultra 9 285T outperforms the Intel Core Ultra 5 225T in every recorded benchmark, with an average score 68.4% higher (51310 versus 30468). The percentile ranking confirms the gap: 91st versus 82nd percentile among all CPUs.

The Ultra 9 285T achieves these results despite a lower base clock of 1.40 GHz versus 2.50 GHz, and a lower TDP of 35 watts versus 65 watts. The higher boost clock of 5.40 GHz and the additional 14 cores more than compensate. The 36 MB L3 cache versus 20 MB provides additional headroom for data-intensive tasks.

The Ultra 5 225T is not a weak processor in absolute terms. Its 82nd percentile ranking and average score of 30468 place it among capable desktop parts, close to the Intel Core i9-11980HK and AMD Ryzen 5 7640HS. It wins no head-to-head benchmarks against the Ultra 9, but its higher base clock and lower core count may suit workloads that favor sustained moderate frequencies over massive parallelism.

The launch MSRP for the Ultra 9 285T is $549. The Ultra 5 225T has no recorded launch MSRP in the database.

Where Each One Wins

The Core Ultra 9 285T wins in every measured category, but the size of the win varies by workload type. The largest margins appear in integer math (55% ahead), data encryption (43% ahead), and floating-point math (40% ahead). These results indicate that the 24-core configuration delivers outsized gains in compute-heavy parallel tasks.

Data compression (39.1% ahead) and random string sorting (39.7% ahead) also show strong advantages, suggesting the larger L3 cache and core count benefit memory-access-heavy operations. Extended instructions (26.9% ahead) and physics (27.8% ahead) show solid but smaller gains.

The closest contest is single-threaded performance, where the Ultra 9 leads by only 5% in PassMark single-thread testing. This suggests that for purely single-threaded applications, the two processors are nearly equivalent, with the Ultra 9's higher boost clock of 5.40 GHz providing a modest edge over the Ultra 5's 4.90 GHz boost.

The Ultra 5 225T finds its niche in its specifications rather than benchmark wins. Its 2.50 GHz base clock is nearly double the Ultra 9's 1.40 GHz base clock, and its 65-watt TDP is higher, which may indicate different thermal behavior under sustained all-core loads. For scenarios where the workload does not scale across many cores, the Ultra 5's higher base frequency could reduce latency in burst operations.

The ECC memory support on the Ultra 9 285T gives it an advantage in reliability-sensitive applications, while the Ultra 5 lacks this feature. The integrated graphics difference, 64 execution units versus 16, favors the Ultra 9 for light graphics tasks without a discrete GPU.

The benchmark sweep is definitive: the Ultra 9 285T is the stronger processor by every recorded metric, with the smallest gap being 5% in single-thread performance and the largest being 55% in integer math. The Ultra 5 225T remains a solid 82nd-percentile desktop processor, but the data shows no workload category where it surpasses the Ultra 9.