Intel Core 9 273PQE vs Intel Core Ultra X9 388H Comparison

Where Each One Wins

The benchmark data splits these two processors into clearly defined roles. The Intel Core 9 273PQE dominates the multithreaded and single-threaded productivity workloads, winning 15 of the 17 recorded head-to-head tests. Its victories span Cinebench multi-core and single-core runs, PassMark integer math, floating point math, data compression, encryption, extended instructions, multithread, random string sorting, and single-thread tests. The Core Ultra X9 388H claims only two wins, both in PassMark physics and prime number finding. These two wins hint at a different strength: the Ultra X9 handles specific algorithmic workloads with unusual efficiency, despite losing the broader performance contest.

For creators running Cinebench R23 multi-core, the Core 9 273PQE scores 39190 against 18911 for the Ultra X9, a 107.2% advantage. That margin is enormous. For single-thread Cinebench R23, the Core 9 leads 5532 versus 2200.5, a 151.4% gap. Data compression in PassMark favors the Core 9 by 61.9%, and integer math by 81.1%. The Core 9 is the workstation choice for rendering, compilation, and any heavy parallel workload. The Ultra X9 counters in physics simulation, where it scores 3226 against 2754, a 14.6% win, and in prime number finding, where it scores 358 against 198, a 44.7% win. These are niche but real advantages, suggesting the Ultra X9 has a distinct architectural trait that accelerates certain integer loops and physics calculations.

The average benchmark scores reinforce the split. The Core 9 273PQE has an average score of 66099, placing it in the 93rd percentile of all CPUs. Its nearest rivals include the AMD Ryzen 9 7950X3D at 65914 (0.3% behind) and the Intel Core Ultra 5 250K Plus at 66855 (1.1% ahead). The Ultra X9 388H averages 44466, in the 88th percentile, with rivals like the AMD Ryzen 5 7500X3D at 44573 and the Intel Core i9-13950HX at 44342. The Core 9 sits in higher company, while the Ultra X9 competes with a different tier of desktop and mobile chips.

Architecture Differences

The two processors differ fundamentally in their construction. The Core 9 273PQE uses a 10 nm process node from Intel, while the Ultra X9 388H uses a 3 nm node, also from Intel. The smaller node gives the Ultra X9 a density advantage, but the Core 9 compensates with higher clocks and a desktop-oriented design. The Core 9 has 12 cores and 24 threads, while the Ultra X9 has 16 cores but only 16 threads. The Core 9's hyperthreading doubles its thread count, which explains its multi-core dominance. The Ultra X9's 16 physical cores without hyperthreading limit its parallel throughput in heavily threaded benchmarks.

Cache structures also differ. The Core 9 has 80 KB of L1 per core, 2 MB of L2 per core, and 36 MB of shared L3. The Ultra X9 has 192 KB of L1 per core, 3 MB of L2 per core, but only 18 MB of shared L3. The larger per-core caches on the Ultra X9 favor workloads with high data locality, like prime number sieving and physics integration, where repeated access to small datasets benefits from bigger L1 and L2. The Core 9's larger L3 pool helps when many threads share data across cores, as in rendering and compression.

Memory support diverges completely. The Core 9 uses DDR4 and DDR5 in a dual-channel configuration with 89.6 GB/s bandwidth and supports ECC memory. The Ultra X9 uses LPDDR5X in dual-channel with 153.6 GB/s bandwidth but no ECC. The Ultra X9's memory bandwidth is 64 GB/s higher, which could benefit memory-bound tasks, but the recorded benchmarks show the Core 9 winning most of those anyway. The Core 9 also has more PCIe lanes: 16 Gen 5 lanes from the CPU versus 4 Gen 5 lanes on the Ultra X9. This makes the Core 9 suitable for discrete GPUs and expansion cards, while the Ultra X9 targets a mobile platform with integrated graphics.

The integrated GPUs differ as well. The Core 9 uses UHD Graphics 770, while the Ultra X9 uses Arc B390. The Ultra X9's integrated graphics is likely more capable for media and light graphics work, but the benchmark data does not cover GPU performance. The Core 9 is a desktop part on Socket 1700 with a 125 W TDP, while the Ultra X9 is a mobile part on BGA 2540 with a 25 W TDP. That fivefold TDP difference explains why the Core 9 can sustain much higher clocks: 5.90 GHz boost versus 5.10 GHz, and 3.40 GHz base versus 2.10 GHz.

Head-to-Head Benchmarks

The largest single win for the Core 9 273PQE comes in Cinebench R23 single-core, where it scores 5532 against 2200.5, a 151.4% delta. That is a massive gap in single-thread performance, driven by the Core 9's 5.90 GHz boost clock and desktop power budget. In multi-core R23, the Core 9 scores 39190 against 18911, a 107.2% delta. This double-digit advantage in both single and multi-threaded Cinebench makes the Core 9 the clear rendering processor.

PassMark integer math shows an 81.1% lead for the Core 9, with 164629 points versus 90882. Data compression follows with a 61.9% margin, 585752 versus 361763. Floating point math is closer, an 11.5% win for the Core 9, 125546 versus 112550. Random string sorting favors the Core 9 by 20.8%, 53167 versus 44010. Extended instructions show a 29.4% lead, 38743 versus 29943. Multithread in PassMark gives the Core 9 a 25.3% advantage, 46107 versus 36811.

The Ultra X9 wins two tests. PassMark find prime numbers shows 358 versus 198, a 44.7% lead for the Ultra X9. PassMark physics shows 3226 versus 2754, a 14.6% lead. Both wins are in tests that involve tight loops over small data sets, which align with the Ultra X9's larger L1 and L2 caches. In data encryption, the Core 9 wins by only 4%, 29636 versus 28490, the narrowest margin of its victories. Single-thread PassMark shows a modest 6.8% lead for the Core 9, 4573 versus 4280, indicating that the Ultra X9's 5.10 GHz boost clock keeps it competitive in lightly threaded workloads despite its mobile design.

The Verdict

The data indicates a clear performance hierarchy. The Intel Core 9 273PQE outperforms the Intel Core Ultra X9 388H in 15 of 17 benchmarks, with average score advantage of 66099 versus 44466. The Core 9 is the superior processor for rendering, compilation, data compression, integer and floating point math, and general multithreaded productivity. Its 24 threads, higher clocks, and larger L3 cache make it the choice for desktop workstations where power is available and performance is the priority.

The Ultra X9 388H wins only in prime number finding and physics simulation. Those wins are real but narrow in scope. For users running physics engines or prime-related algorithms, the Ultra X9 offers a measurable edge, likely due to its 192 KB L1 and 3 MB L2 per core. However, its 16 threads and 18 MB L3 limit its broader appeal. The Ultra X9 also has higher memory bandwidth at 153.6 GB/s versus 89.6 GB/s, which could help in memory-bound scenarios not captured in these tests.

The Core 9's 93rd percentile ranking versus the Ultra X9's 88th percentile confirms the performance gap. The Core 9's nearest rivals include the Ryzen 9 7950X3D and the Core Ultra 5 250K Plus, placing it in high-end desktop territory. The Ultra X9's rivals include the Ryzen 5 7500X3D and the Core i9-13950HX, a mid-range to upper-mid-range grouping. Users who need maximum throughput and have a desktop chassis should choose the Core 9. Users who need a mobile processor with low power consumption and specific physics or prime-number acceleration should consider the Ultra X9, but they must accept lower scores in nearly every other workload.

FAQ

Q: Which processor wins more benchmarks?

A: The Intel Core 9 273PQE wins 15 of 17 head-to-head benchmarks, while the Intel Core Ultra X9 388H wins 2.

Q: What is the largest performance margin between the two?

A: The largest margin is in Cinebench R23 single-core, where the Core 9 273PQE scores 5532 versus 2200.5, a 151.4% advantage.

Q: Does the Ultra X9 388H win any tests?

A: Yes, it wins PassMark find prime numbers (358 versus 198, a 44.7% lead) and PassMark physics (3226 versus 2754, a 14.6% lead).

Q: How do the core counts differ?

A: The Core 9 273PQE has 12 cores and 24 threads. The Ultra X9 388H has 16 cores and 16 threads.

Q: What is the memory bandwidth difference?

A: The Core 9 273PQE has 89.6 GB/s bandwidth with DDR4/DDR5 support. The Ultra X9 388H has 153.6 GB/s with LPDDR5X support.

Q: Which processor has a higher average benchmark score?

A: The Core 9 273PQE averages 66099, while the Ultra X9 388H averages 44466. The Core 9 sits in the 93rd percentile, the Ultra X9 in the 88th.

Specification Differences

The two processors differ in nearly every core specification. The Core 9 273PQE has 12 cores and 24 threads, while the Ultra X9 388H has 16 cores and 16 threads. Base clock is 3.40 GHz for the Core 9 versus 2.10 GHz for the Ultra X9. Boost clock is 5.90 GHz versus 5.10 GHz. TDP is 125 W for the Core 9 versus 25 W for the Ultra X9. The Core 9 uses Socket 1700, the Ultra X9 uses BGA 2540. Process node is 10 nm for the Core 9, 3 nm for the Ultra X9. Cache differs: the Core 9 has 80 KB L1 per core, 2 MB L2 per core, and 36 MB shared L3. The Ultra X9 has 192 KB L1 per core, 3 MB L2 per core, and 18 MB shared L3. Memory support: the Core 9 uses DDR4 and DDR5 with ECC, the Ultra X9 uses LPDDR5X without ECC. Memory bandwidth is 89.6 GB/s versus 153.6 GB/s. PCIe lanes are 16 Gen 5 for the Core 9, 4 Gen 5 for the Ultra X9. Integrated graphics are UHD Graphics 770 versus Arc B390. Market segment is Desktop for the Core 9, Mobile for the Ultra X9. Release dates are March 8, 2026 for the Core 9 and January 4, 2026 for the Ultra X9. The Core 9 has a launch MSRP of $589; the Ultra X9 has no recorded launch MSRP.