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Intel Core Ultra X9 378H vs Intel Core Ultra X9 388H: Comparison
Core Ultra X9 378H vs Core Ultra X9 388H: the efficiency cores difference
Expect a near tie. The closest thing to a difference is efficiency cores, Core Ultra X9 378H 12 against Core Ultra X9 388H 8. They differ on microarchitecture too, Panther Lake on the Core Ultra X9 378H versus Panther Lake, Intel Core Ultra Series 3 on the Core Ultra X9 388H. There is a split on memory type as well, LPDDR5x up to 9600 MT/s on the Core Ultra X9 378H versus LPDDR5x on the Core Ultra X9 388H.
Who each one is for
Buy the Core Ultra X9 378H for premium thin laptops for creators and students in demanding courses and gaming and creative work on integrated Arc B390 graphics, though it is not built for budget buyers who mainly browse and use office apps and high-refresh AAA gaming, where a dedicated GPU is still faster. It also earns its place with copilot+ PC and on-device AI features with a 50 TOPS NPU. The Core Ultra X9 388H is the one to take for thin laptops needing 12 Xe3-core Arc B390 graphics. The same goes for users wanting a boost clock up to 5.1 GHz, 16 cores and a 50 TOPS NPU. It is not the one for laptops needing DDR5 SO-DIMM slots, since this chip is listed for LPDDR5x.
Where the two are identical
Everything else lines up. Total cores, performance cores, total threads, e-core base clock and tdp read the same on both, so those are not worth weighing. They match on 10 further specifications as well.
Do the Core Ultra X9 378H and Core Ultra X9 388H differ on p-core boost clock?
Yes. P-Core Boost Clock reads 5.0 GHz on the Core Ultra X9 378H versus 5.1 GHz on the Core Ultra X9 388H.
Is the L3 Cache the same on the Core Ultra X9 378H and Core Ultra X9 388H?
It is. Both are listed at 18 MB, so it is not a reason to pick one over the other.
Specs and benchmarks
Brand
- Intel Core Ultra X9 378H
- Intel
- Intel Core Ultra X9 388H
- Intel
Product Line
- Intel Core Ultra X9 378H
- Core Ultra X9
- Intel Core Ultra X9 388H
- Core Ultra X9
Form Factor
- Intel Core Ultra X9 378H
- Laptop
- Intel Core Ultra X9 388H
- Laptop
Model Number
- Intel Core Ultra X9 378H
- 378H
- Intel Core Ultra X9 388H
- 388H
Codename
- Intel Core Ultra X9 378H
- Panther Lake
- Intel Core Ultra X9 388H
- Panther Lake
Release Year
- Intel Core Ultra X9 378H
- 2026
- Intel Core Ultra X9 388H
- 2026
TDP
- Intel Core Ultra X9 378H
- 25 W
- Intel Core Ultra X9 388H
- 25 W
iGPU
- Intel Core Ultra X9 378H
- Intel Arc B390 GPU
- Intel Core Ultra X9 388H
- Intel Arc B390 (12 Xe3-cores)
Market Segment
- Intel Core Ultra X9 378H
- Laptop
- Intel Core Ultra X9 388H
- Laptop
Microarchitecture
- Intel Core Ultra X9 378H
- Panther Lake
- Intel Core Ultra X9 388H
- Panther Lake, Intel Core Ultra Series 3
Socket
- Intel Core Ultra X9 378H
- FCBGA2540
- Intel Core Ultra X9 388H
- FCBGA2540
Process Node
- Intel Core Ultra X9 378H
- 18 nm
- Intel Core Ultra X9 388H
- 18 nm
Total Cores
- Intel Core Ultra X9 378H
- 16
- Intel Core Ultra X9 388H
- 16
Performance Cores
- Intel Core Ultra X9 378H
- 4
- Intel Core Ultra X9 388H
- 4
Efficiency Cores
- Intel Core Ultra X9 378H
- 12Best
- Intel Core Ultra X9 388H
- 8
Total Threads
- Intel Core Ultra X9 378H
- 16
- Intel Core Ultra X9 388H
- 16
SMT Enabled
- Intel Core Ultra X9 378H
- No
- Intel Core Ultra X9 388H
- No
P-Core Base Clock
- Intel Core Ultra X9 378H
- 2.0 GHz
- Intel Core Ultra X9 388H
- 2.1 GHz
P-Core Boost Clock
- Intel Core Ultra X9 378H
- 5.0 GHz
- Intel Core Ultra X9 388H
- 5.1 GHz
E-Core Base Clock
- Intel Core Ultra X9 378H
- 1.6 GHz
- Intel Core Ultra X9 388H
- 1.6 GHz
L3 Cache
- Intel Core Ultra X9 378H
- 18 MB
- Intel Core Ultra X9 388H
- 18 MB
Base Power
- Intel Core Ultra X9 378H
- 25 W
- Intel Core Ultra X9 388H
- 25 W
Max Turbo Power
- Intel Core Ultra X9 378H
- 80 W
- Intel Core Ultra X9 388H
- 80 W
Memory Type
- Intel Core Ultra X9 378H
- LPDDR5x up to 9600 MT/s
- Intel Core Ultra X9 388H
- LPDDR5x
Integrated Graphics
- Intel Core Ultra X9 378H
- Yes
- Intel Core Ultra X9 388H
- Yes
NPU Peak TOPS
- Intel Core Ultra X9 378H
- 50 TOPS (Intel AI Boost)
- Intel Core Ultra X9 388H
- 50 TOPS (NPU 5)
Which one should you pick?
Choose 378H if you want the higher L3 cache (18 MB vs 18 MB).
Choose 388H if you already have it on hand or find it at a lower price.