Intel Core Ultra 7 265T vs Intel Core Ultra X9 388H Comparison

The Intel Core Ultra 7 265T and the Intel Core Ultra X9 388H represent two distinct interpretations of Intel's 3 nm process technology, one aimed at the desktop and the other at mobile. The benchmark data reveals a clear split in performance characteristics, with the desktop part dominating most workloads but the mobile chip showing specific strengths in a few specialized areas.

Head-to-Head Benchmarks

The most striking difference in the recorded data appears in the Cinebench R23 tests. The Intel Core Ultra 7 265T posts a multicore score of 31558, which is 66.9% ahead of the Ultra X9 388H's 18911. The single-core delta in the same test is even larger: 4455 versus 2200.5, a 102.5% advantage for the desktop processor. This massive gap suggests the 265T's higher boost clock of 5.30 GHz, combined with its larger 30 MB L3 cache, delivers substantially more performance in this rendering workload.

Older Cinebench versions show a narrower margin. In Cinebench R15 multicore, the 265T scores 3180 against the 388H's 2955, a 7.6% lead. The single-core R15 result is a 45.1% gap (449 versus 309.5), still decisive but less extreme than the R23 numbers. Cinebench R20 shows the closest multicore result in the entire head-to-head set: 13254 versus 13101, a mere 1.2% difference. Single-core R20 also lands at 1.2% (1871 versus 1849), indicating that the two processors are nearly equivalent in this specific test.

The Passmark suite paints a more nuanced picture. The 265T wins data compression with 370158 versus 361763, a 2.3% margin, and data encryption with 29687 versus 28490, a 4.2% edge. Floating point math favors the desktop part by 15.3% (129817 versus 112550), and integer math by 15.5% (104943 versus 90882). The multithread score is close at 0.7% (37084 versus 36811), as is random string sorting at 0.9% (44400 versus 44010). Single-thread performance in Passmark gives the 265T a 1.4% lead (4338 versus 4280).

The Ultra X9 388H claims three wins. Extended instructions show a 4.5% advantage (29943 versus 28609), and find prime numbers a 10.1% edge (358 versus 322). The most significant victory for the mobile chip is in Passmark physics, where it scores 3226 against 2391, a 25.9% margin. This physics result stands out because it contradicts the overall trend, suggesting the 388H's architecture handles that specific workload with unusual efficiency.

The aggregate data confirms the 265T's dominance: it wins 14 of the 17 head-to-head comparisons. Its average benchmark score is 47697, which places it in the 90th percentile of all CPUs. The 388H averages 44466, sitting in the 88th percentile. The nearest rivals for the desktop chip include the AMD Ryzen 9 PRO 5945 at a 0.4% delta and the AMD Ryzen 9 7900X3D at a -0.4% delta, showing the 265T is closely clustered with those parts. The 388H sits within 0.5% of the Intel Core i5-13600 and 0.4% of the AMD Ryzen AI Max 385.

The Verdict

The data indicates that the Intel Core Ultra 7 265T is the stronger processor for compute-heavy tasks. Its 66.9% lead in Cinebench R23 multicore and 102.5% lead in R23 single-core are not marginal differences; they represent a generational gap within the same process node. The 265T also holds advantages in floating point math, integer math, and data encryption, making it the clear choice for rendering, scientific simulation, and encryption workloads.

The Ultra X9 388H is not without merit. Its 25.9% win in Passmark physics points to a specific architectural strength, and its 10.1% lead in find prime numbers suggests the Panther Lake design handles certain integer iterations more efficiently. The 388H also delivers a higher memory bandwidth of 153.6 GB/s, which could benefit workloads that are memory-bound rather than compute-bound.

From the recorded measurements, the 265T suits users who prioritize raw multicore throughput and single-thread responsiveness. The 388H suits scenarios where power efficiency and the physics-oriented results matter more, but the overall benchmark average of 44466 versus 47697 confirms the desktop part is the higher-performing unit in the majority of tests.

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Core Ultra 7 265T has an average benchmark score of 47697, while the Intel Core Ultra X9 388H averages 44466.

Q: What is the largest performance gap in the head-to-head results?

A: The Cinebench R23 single-core test shows the largest gap, with the 265T scoring 4455 against the 388H's 2200.5, a 102.5% advantage.

Q: In which tests does the Intel Core Ultra X9 388H outperform the 265T?

A: The 388H wins Passmark extended instructions (29943 versus 28609), Passmark find prime numbers (358 versus 322), and Passmark physics (3226 versus 2391).

Q: How do the two processors compare in Cinebench R20 multicore?

A: They are nearly identical. The 265T scores 13254 and the 388H scores 13101, a difference of only 1.2%.

Q: What are the percentile rankings for each processor?

A: The 265T is in the 90th percentile of all CPUs, and the 388H is in the 88th percentile.

Q: Which processor has a higher boost clock?

A: The Intel Core Ultra 7 265T has a boost clock of 5.30 GHz, compared to 5.10 GHz for the Ultra X9 388H.

Specification Differences

The two processors diverge in several core specifications. The 265T has 20 cores and 20 threads, while the 388H has 16 cores and 16 threads. Base clocks differ: 1.50 GHz for the 265T versus 2.10 GHz for the 388H. The desktop chip boosts to 5.30 GHz, the mobile chip to 5.10 GHz.

Thermal design power shows a meaningful difference. The 265T has a TDP of 35, while the 388H is rated at 25. The socket types are entirely different: the 265T uses Intel Socket 1851, and the 388H uses Intel BGA 2540. The 265T supports DDR5 memory, whereas the 388H supports LPDDR5X. Memory bandwidth favors the mobile part: 153.6 GB/s versus 102.4 GB/s for the desktop chip.

PCIe lane counts differ substantially. The 265T provides Gen 5 with 20 lanes, while the 388H offers Gen 5 with only 4 lanes. Integrated graphics also differ: the 265T has Arc Xe-LPG Graphics with 64EU, and the 388H has Arc B390. The 265T has a launch MSRP of $384, while the 388H has no recorded launch MSRP. The 265T's part number is SRQCS, and the 388H's is SA4QWQ9EK. Both processors have locked multipliers.

Architecture Differences

The 265T uses the Arrow Lake architecture, codenamed Arrow Lake-S, and belongs to the Core Ultra Series 2. The 388H uses Panther Lake, codenamed Panther Lake, and belongs to Core Ultra Series 3. Both are built on a 3 nm process, but the foundries differ: the 265T is fabricated by TSMC, while the 388H is fabricated by Intel.

The 265T has a transistor count of 17,800 million and a die size of 243 mm². The 388H has no recorded transistor count or die size in the database. Cache configurations are identical at the L1 and L2 levels: 192 KB per core and 3 MB per core respectively. The L3 cache differs, with the 265T offering 30 MB shared and the 388H offering 18 MB shared.

The 265T is a desktop processor released on 2025-01-06, while the 388H is a mobile processor released on 2026-01-04. Neither supports ECC memory. The market segments are explicit: desktop for the 265T, mobile for the 388H. Both are listed as active in production status.

Where Each One Wins

The Intel Core Ultra 7 265T wins in the majority of recorded benchmarks. It dominates Cinebench R15, R20, and R23 in both single-core and multicore tests, with the R23 multicore margin of 66.9% being the most decisive. Passmark data compression, data encryption, floating point math, integer math, multithread, random string sorting, and single-thread tests all favor the 265T. This makes it the stronger choice for rendering, video encoding, scientific computing, and general productivity workloads that rely on sustained multicore performance.

The Intel Core Ultra X9 388H wins three specific tests: Passmark extended instructions, Passmark find prime numbers, and Passmark physics. The physics win of 25.9% is the largest margin for either chip outside the Cinebench R23 results. The 388H also has a memory bandwidth advantage of 153.6 GB/s versus 102.4 GB/s, which may benefit workloads that are memory-bandwidth sensitive despite the lower compute scores. The 388H's lower TDP of 25 compared to 35 suggests it is suited for thermally constrained mobile environments, where the 265T's desktop socket cannot be used at all.