Intel Core Ultra 7 270K Plus vs Intel Core Ultra X9 388H Comparison

Head-to-Head Benchmarks

The recorded data shows a complete sweep in the head-to-head comparison. The Intel Core Ultra 7 270K Plus wins all 17 benchmark comparisons, with the Intel Core Ultra X9 388H recording zero wins. The largest margin appears in Cinebench R23 multi-core, where the 270K Plus scores 44,253 against 18,911, a delta of 134%. Cinebench R15 multi-core shows a similar gap at 125.2%, with scores of 6,656 versus 2,955.

The single-core differences are smaller but still decisive. Cinebench R23 single-core shows the 270K Plus at 2,439 versus 2,200.5, a 10.8% advantage. PassMark single-thread shows 5,068 against 4,280, an 18.4% delta. The narrowest gap in the entire set is Cinebench R15 single-core, where 354 beats 309.5 by 14.4%. Single-core performance gaps in the 10-18% range indicate a meaningful architectural edge for the desktop part, though not the overwhelming margin seen in multi-threaded workloads.

Multi-threaded workloads reveal the 270K Plus at its strongest. PassMark multi-thread scores 68,574 versus 36,811, a delta of 86.3%. PassMark integer math shows 175,986 against 90,882, a 93.6% advantage. PassMark floating-point math delivers 229,491 versus 112,550, a 103.9% lead. PassMark data compression reaches 804,322 against 361,763, a 122.3% delta. PassMark data encryption shows 59,097 versus 28,490, a 107.4% edge. PassMark extended instructions score 63,506 against 29,943, a 112.1% advantage. PassMark random string sorting delivers 96,945 versus 44,010, a 120.3% delta. PassMark find prime numbers shows 615 against 358, a 71.8% lead. PassMark physics is the closest multi-threaded test, with 4,064 versus 3,226, a 26% advantage.

The average benchmark score places the 270K Plus at 93,785, which sits in the 96th percentile of all CPUs. The 388H averages 44,466, in the 88th percentile. The nearest rival to the 270K Plus is the Intel Xeon 6520P with an average score of 93,786 and a delta of 0%. AMD EPYC 4564P trails by 1.5%, AMD EPYC 9175F by 1.9%, and AMD EPYC 4565P by 2.1%. The 388H sits closest to the AMD Ryzen 5 7500X3D, which scores 44,573, a delta of -0.2% relative to the 388H. The Intel Core i9-13950HX is 0.3% ahead, the AMD Ryzen AI Max 385 is 0.4% ahead, and the Intel Core i5-13600 is 0.5% ahead.

Architecture Differences

The two processors come from different Intel series and target different market segments. The Core Ultra 7 270K Plus belongs to Core Ultra Series 2, codenamed Arrow Lake Refresh, built on a 3 nm process at TSMC. It is a desktop part released on 2026-03-10, using Intel Socket 1851. The Core Ultra X9 388H belongs to Core Ultra Series 3, codenamed Panther Lake, built on a 3 nm process at Intel's own foundry. It is a mobile part released on 2026-01-04, using Intel BGA 2540.

Core counts differ substantially. The 270K Plus has 24 cores and 24 threads, while the 388H has 16 cores and 16 threads. Neither part uses hyper-threading, as thread counts equal core counts in both cases. The 270K Plus carries 17,800 million transistors on a 243 mm² die. The 388H has no recorded transistor count or die size in the database.

Cache configuration shows both parts using the same per-core L1 and L2 figures: 192 KB per core for L1 and 3 MB per core for L2. The shared L3 differs, with the 270K Plus offering 36 MB shared versus 18 MB shared on the 388H. Clock speeds also diverge. The 270K Plus has a base clock of 3.70 GHz and a boost clock of 5.50 GHz. The 388H runs at 2.10 GHz base and 5.10 GHz boost.

Memory support separates the two clearly. The 270K Plus uses DDR5 with dual-channel memory bus and a recorded bandwidth of 115.2 GB/s. It supports ECC memory. The 388H uses LPDDR5X with dual-channel bus and a higher recorded bandwidth of 153.6 GB/s. It does not support ECC memory. PCIe lanes differ as well: the 270K Plus provides Gen 5 with 20 lanes (CPU only), while the 388H provides Gen 5 with 4 lanes (CPU only).

Integrated graphics differ. The 270K Plus uses Arc Xe-LPG Graphics with 64 execution units. The 388H uses Arc B390. The 270K Plus has an unlocked multiplier, the 388H does not. The 270K Plus has a recorded launch MSRP of $299; the 388H has no recorded launch MSRP.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core Ultra 7 270K Plus has 24 cores and 24 threads. The Intel Core Ultra X9 388H has 16 cores and 16 threads.

Q: How large is the L3 cache difference?

A: The 270K Plus has 36 MB shared L3 cache. The 388H has 18 MB shared L3 cache.

Q: What memory types do the two processors support?

A: The 270K Plus supports DDR5 memory with dual-channel bus and 115.2 GB/s bandwidth. The 388H supports LPDDR5X memory with dual-channel bus and 153.6 GB/s bandwidth.

Q: Which processor supports ECC memory?

A: The 270K Plus supports ECC memory. The 388H does not.

Q: What is the boost clock for each processor?

A: The 270K Plus boosts to 5.50 GHz. The 388H boosts to 5.10 GHz.

Q: Which processor has a higher average benchmark score?

A: The 270K Plus averages 93,785, placing in the 96th percentile of all CPUs. The 388H averages 44,466, placing in the 88th percentile.

Specification Differences

The two processors differ in every major specification category. Core count: 24 versus 16. Thread count: 24 versus 16. Base clock: 3.70 GHz versus 2.10 GHz. Boost clock: 5.50 GHz versus 5.10 GHz. TDP: 125 watts versus 25 watts. Socket: Intel Socket 1851 versus Intel BGA 2540. Series: Core Ultra Series 2 versus Core Ultra Series 3. Codename: Arrow Lake Refresh versus Panther Lake. Architecture: not recorded for the 270K Plus, Panther Lake for the 388H. Foundry: TSMC versus Intel. Transistor count: 17,800 million versus not recorded. Die size: 243 mm² versus not recorded.

Cache differences: L1 is identical at 192 KB per core for both. L2 is identical at 3 MB per core for both. L3 differs: 36 MB shared versus 18 MB shared. Memory support: DDR5 versus LPDDR5X. Memory bandwidth: 115.2 GB/s versus 153.6 GB/s. ECC support: enabled versus disabled. PCIe lanes: 20 versus 4, both Gen 5. Integrated graphics: Arc Xe-LPG Graphics 64EU versus Arc B390. Market segment: Desktop versus Mobile. Release date: 2026-03-10 versus 2026-01-04. Launch MSRP: $299 versus not recorded. Multiplier unlock: yes versus no.

Where Each One Wins

The Intel Core Ultra 7 270K Plus wins every recorded benchmark comparison. Its largest advantages appear in multi-threaded workloads, where the combination of 24 cores, 36 MB L3 cache, and a 5.50 GHz boost clock produces deltas above 100% in several PassMark tests. The 134% lead in Cinebench R23 multi-core and the 125.2% lead in Cinebench R15 multi-core indicate strong scaling across heavily parallel workloads. The 107.4% lead in data encryption and the 122.3% lead in data compression suggest the 270K Plus handles data-intensive tasks with substantial headroom.

The 388H does not win any benchmark, but its profile still shows relative strengths. The narrowest gaps appear in single-core tests: 10.8% in Cinebench R23 single-core and 14.4% in Cinebench R15 single-core. The 26% delta in PassMark physics is the smallest multi-threaded gap. These figures indicate the 388H closes some distance in lightly threaded and physics-based workloads, though it remains behind. The 388H's 153.6 GB/s memory bandwidth exceeds the 270K Plus's 115.2 GB/s, which may partially compensate in memory-bound scenarios, though no benchmark in the recorded data isolates memory bandwidth.

The 270K Plus also holds a higher percentile ranking at 96% versus 88%. Its average benchmark score of 93,785 is more than double the 388H's 44,466. The nearest rivals for the 270K Plus are server-class Xeon and EPYC parts, all within 2.1% of its average score. The 388H competes with mainstream desktop and mobile parts, with its closest rival, the AMD Ryzen 5 7500X3D, only 0.2% behind.

The Verdict

The data indicates a clear choice for users prioritizing raw computational performance. The Intel Core Ultra 7 270K Plus leads by substantial margins in every recorded benchmark, with multi-core deltas frequently exceeding 100%. Its 24 cores, 36 MB L3 cache, 125-watt TDP, and desktop socket design make it suitable for workloads that scale across many threads. The 96th percentile ranking and average score of 93,785 place it among server-class processors, with nearest rivals being Xeon and EPYC models.

The Intel Core Ultra X9 388H serves a different purpose. Its 25-watt TDP, BGA socket, and mobile market segment indicate a low-power design for portable systems. The 153.6 GB/s memory bandwidth exceeds the desktop part, and the 88th percentile ranking shows it still outperforms the majority of CPUs. Its nearest rivals include mainstream desktop processors like the Core i5-13600 and mobile HX-series parts, suggesting it slots into premium mobile computing rather than desktop workstations.

Users selecting between these two should consider the platform constraints. The 270K Plus requires a desktop motherboard with Socket 1851 and DDR5 support. The 388H is a mobile processor soldered to a BGA 2540 board, not available for standalone desktop installation. The 270K Plus supports ECC memory, an unlocked multiplier, and has a launch MSRP of $299. The 388H lacks ECC support and multiplier unlock, and has no recorded launch MSRP.

For desktop users needing maximum multi-threaded throughput, the 270K Plus is the only viable option in this comparison. For mobile users who need a capable processor in a low-power envelope, the 388H delivers competitive single-core performance within 10.8% to 18.4% of the desktop part, while consuming considerably less power. The choice depends on form factor and workload requirements, not on benchmark superiority, which the 270K Plus holds across all 17 recorded tests.