Quick Verdict
A very capable high-end mobile SoC that brings strong multi-threaded performance, a potent integrated GPU and serious AI acceleration to thin laptops, though its confusing naming and near-identical specs to the X7 368H make it hard to justify on price alone.
Overview
Launch
2026
Status
LaunchedGeneration
Core Ultra Series 3 (Panther Lake)
Market
Mobile
The Intel Core Ultra X9 378H is a 16-core, 16-thread high-end mobile SoC from Intel’s Panther Lake family, built on the Intel 18A process and featuring a 4P+8E+4LP hybrid CPU, an Arc B390 iGPU with 12 Xe3 cores, and a 50 TOPS NPU for AI workloads.
Intel’s Core Ultra X9 378H sits near the top of the Panther Lake mobile lineup with 16 CPU cores in a 4P+8E+4LP layout, up to 5.0 GHz on the P-cores, 18 MB of Intel Smart Cache and a 25 W base power that can scale to 80 W under turbo. It integrates an Arc B390 iGPU with 12 Xe3 cores and a dedicated 50 TOPS NPU, making it well suited for content creation, AI-enhanced workflows and light gaming in thin designs.
Effectively, it’s an X7 368H without vPro or embedded features, targeting consumer laptops rather than business fleets.
Specifications
Performance
Sixteen cores with strong single‑thread clocks make short work of office tasks, web browsing and heavier productivity workloads; sustained multi‑threaded performance is competitive with other high‑end mobile chips at similar power envelopes.
Capable of light VM use, but 16 threads and consumer‑oriented power limits mean it’s not ideal for heavy virtualization workloads compared to higher‑TDP HX‑class chips.
The Arc B390 iGPU gives a big step up over older Intel integrated graphics, handling many modern titles at 1080p medium–high settings, but discrete GPUs still win for serious 1440p/4K gaming or ray‑heavy titles.
Intel 18A and the hybrid core layout deliver good performance per watt at typical laptop power limits, but high‑current turbo states can still draw significant power when pushed hard.
- •Arc B390 iGPU is a major upgrade over earlier Intel mobile iGPUs.
- •Suitable for 1080p gaming in many esports and AAA titles at medium–high settings.
- •Ray tracing is supported but best used selectively due to iGPU limitations.
- •Discrete GPUs still preferred for high‑refresh 1440p+ gaming.
- •50 TOPS NPU enables local AI features like Windows Studio Effects and lightweight LLM inference.
- •Combined CPU + GPU + NPU acceleration benefits OpenVINO, DirectML and ONNX workflows.
- •Not aimed at heavy datacenter‑style training, but strong for client‑side AI PC experiences.
Architecture
Intel 18A (CPU tile), TSMC N3E (GPU tile)
Process Node
Panther Lake-H
Codename
16C / 16T
Core Config
18 MB
L3 Cache
25 W
TDP
Architecture Overview
Panther Lake is Intel’s first client SoC built on the Intel 18A process, using a chiplet design with separate CPU, GPU and platform controller tiles. The Core Ultra X9 378H uses the 16‑core compute tile with Cougar Cove P‑cores and Darkmont E‑cores, paired with an Arc B390 GPU tile and an NPU for AI acceleration.
CPU Design
The CPU arranges four Cougar Cove performance cores, eight Darkmont efficiency cores and four low‑power Darkmont LP cores. P‑cores handle bursty, latency‑sensitive work; E‑cores handle background and throughput tasks; LP cores focus on very‑low‑power scenarios. Hyper‑Threading is not used, so there are 16 threads total.
Memory Subsystem
A dual‑channel memory controller supports up to 96 GB of LPDDR5X at 9600 MT/s, providing high bandwidth for CPU and iGPU in a compact, power‑efficient package.
PCIe & I/O
The SoC exposes 12 PCIe lanes from the CPU, split between PCIe 5.0 and 4.0, used for NVMe SSDs, Thunderbolt 4 and other high‑speed peripherals.
Overclocking
The multiplier is locked; overclocking headroom is limited to BCLK and tuning, which is highly platform‑dependent and not officially supported on mobile.
- Move from Lunar Lake to Panther Lake on Intel 18A with a hybrid 4P+8E+4LP design.
- Significantly stronger integrated graphics with Arc B390 instead of Arc 140V.
- Dedicated 50 TOPS NPU versus the smaller AI Boost block in Lunar Lake.
- Higher max turbo power and more consistent multi‑core performance under load.
Key Highlights
- 16 hybrid cores with strong single‑thread and multi‑thread performance.
- Arc B390 iGPU is a big step up for integrated gaming and content workloads.
- 50 TOPS NPU enables serious AI PC experiences without a discrete GPU.
- Intel 18A and advanced packaging bring good efficiency for the performance level.
- 25–80 W configurable TDP fits a wide range of laptop designs.
- Confusing X9 vs 9 branding and near‑identical specs to X7 368H make positioning unclear.
- No vPro or embedded support limits use in business and industrial designs.
- iGPU still can’t replace a discrete GPU for high‑refresh 1440p/4K gaming.
- Locked multiplier offers limited overclocking fun.
- Real‑world laptop performance depends heavily on OEM power and thermal tuning.
History
Intel introduced the Core Ultra X9 378H as part of its Panther Lake‑based Core Ultra Series 3 lineup at CES 2026, quietly adding the SKU to its ARK database in early 2026. On paper, the 378H mirrors the existing Core Ultra X7 368H with 16 cores, 18 MB cache and 5.0 GHz max turbo, but drops vPro and embedded features to target consumer designs.
Early laptop listings, such as Lenovo’s Yoga Air 14 Ultra Aura, showed the chip in premium thin‑and‑light machines, often at very high placeholder prices. Reviewers noted that the real‑world performance is essentially identical to the X7 368H, with the X9 branding serving more as a market segmentation tool than a technical upgrade.
Improvements over Previous Generation
- Move from Lunar Lake to Panther Lake on Intel 18A with a hybrid 4P+8E+4LP design.
- Significantly stronger integrated graphics with Arc B390 instead of Arc 140V.
- Dedicated 50 TOPS NPU versus the smaller AI Boost block in Lunar Lake.
- Higher max turbo power and more consistent multi‑core performance under load.
Alternatives & Competitors
Should You Buy It?
Recommended for the right buyer
Premium thin‑and‑light laptops where strong iGPU, AI features and multi‑threaded performance matter more than ultra‑low price or maximum gaming FPS.
Avoid if…
- You want the absolute fastest mobile gaming and are willing to carry a thicker laptop with a discrete GPU.
- You need vPro or embedded features for business/industrial use.
- You’re on a tight budget and don’t need the extra CPU/GPU headroom.
Use Cases
Interesting Facts
The Core Ultra X9 378H is essentially a consumer‑only version of the Core Ultra X7 368H, without vPro and embedded features.
Intel ARK lists the same 16 cores, 18 MB cache and 5.0 GHz max turbo for both the X7 368H and X9 378H.
Panther Lake is Intel’s first client platform built on the Intel 18A process with PowerVia backside power delivery.
The Arc B390 iGPU uses Xe3 cores and can hit up to 2.5 GHz, with support for ray tracing and AV1 encode/decode.
The NPU delivers 50 TOPS of INT8 performance, matching Intel’s target for Copilot+‑class AI PCs.
Lenovo’s Yoga Air 14 Ultra Aura was one of the first announced laptops using the X9 378H.
Intel’s own quick‑reference guide groups all Series 3 Panther Lake SKUs under the Core Ultra brand, formerly codenamed Panther Lake.
The SoC uses a chiplet design with separate CPU (Intel 18A), GPU (TSMC N3E) and platform controller tiles.
Maximum supported memory is 96 GB LPDDR5X, which is lower than some competing AMD Ryzen AI 9 configurations.
Despite the “X9” branding, this chip has 16 threads like the X7 368H, not the 24 threads of some higher‑end HX‑class parts.
People Also Ask
Is the Intel Core Ultra X9 378H good for gaming?
Yes for integrated graphics gaming. The Arc B390 iGPU handles many titles at 1080p medium–high settings, but for high‑refresh 1440p/4K gaming or ray‑heavy titles, a discrete GPU is still better.
What is the difference between Core Ultra X9 378H and Core Ultra X7 368H?
On paper, they share the same 16‑core CPU, 18 MB cache, 5.0 GHz max turbo and Arc B390 iGPU. The X9 378H lacks vPro and embedded features and is positioned as a consumer SKU, while the X7 368H can include vPro and is aimed at business and embedded designs.
How much power does the Core Ultra X9 378H use?
Intel specifies a 25 W base (processor base power) and up to 80 W maximum turbo power, with a configurable down to 15 W depending on OEM implementation.
Does the Core Ultra X9 378H support DDR5 memory?
It supports LPDDR5X up to 9600 MT/s on dual channels; Intel ARK does not list separate DDR5 support, so LPDDR5X is the specified memory type.
Is the Core Ultra X9 378H an AI PC processor?
Yes. It includes a 50 TOPS NPU and supports Intel’s AI software stack, making it suitable for Copilot+‑class AI PC experiences.
Can you overclock the Core Ultra X9 378H?
The multiplier is locked, so traditional multiplier overclocking is not supported. Some BCLK‑based tuning may be possible depending on the laptop, but it’s not officially advertised as an overclocking‑friendly part.
What socket does the Core Ultra X9 378H use?
It uses the FCBGA2540 socket, which is a mobile BGA package soldered directly to the laptop motherboard.
How does the Core Ultra X9 378H compare to AMD Ryzen AI 9 365?
Both are high‑end mobile SoCs with strong integrated graphics and NPUs. The Intel chip has more CPU cores (16 vs 10) and a higher‑clocked iGPU, while the Ryzen AI 9 365 can support more memory and offers competitive performance per watt.
What laptops use the Intel Core Ultra X9 378H?
Early examples include Lenovo’s Yoga Air 14 Ultra Aura and related Yoga Slim 7i Ultra Aura Edition models, with more Panther Lake designs expected through 2026.
Is the Core Ultra X9 378H better than Lunar Lake chips?
For CPU and GPU performance, yes. It has more cores, a much stronger Arc B390 iGPU and a dedicated 50 TOPS NPU. However, Lunar Lake chips like the Core Ultra 7 258V/268V may be more power‑efficient at lower performance levels.
Frequently Asked Questions
Does the Core Ultra X9 378H have integrated graphics?
Yes. It integrates Intel Arc B390 graphics with 12 Xe3 cores and up to 2.5 GHz dynamic frequency.
How many cores and threads does the Core Ultra X9 378H have?
It has 16 cores (4P+8E+4LP) and 16 threads, with no Hyper‑Threading.
What process node is the Core Ultra X9 378H built on?
The CPU tile uses Intel’s 18A process; the GPU tile is manufactured on TSMC N3E.
What is the max turbo frequency of the Core Ultra X9 378H?
The P‑cores can boost up to 5.0 GHz, while the E‑cores and LP‑cores have lower max turbo frequencies.
How much cache does the Core Ultra X9 378H have?
Intel specifies 18 MB of Intel Smart Cache; the exact L2/L3 split is not detailed in ARK.
Can I upgrade the CPU in a laptop with a Core Ultra X9 378H?
No. The FCBGA2540 package is soldered to the motherboard, so the CPU is not user‑replaceable.
Does the Core Ultra X9 378H support Thunderbolt?
Yes, the platform supports Thunderbolt 4 via the integrated controller.
What is the maximum memory supported by the Core Ultra X9 378H?
Up to 96 GB of LPDDR5X memory in dual‑channel configuration.
Is the Core Ultra X9 378H suitable for content creation?
Yes. With 16 cores, a strong iGPU and hardware encode/decode for modern codecs, it’s a good fit for video editing, photo editing and light 3D work on the go.
What are the main differences between Core Ultra X9 378H and Core Ultra 9 386H?
The X9 378H has the larger Arc B390 iGPU with 12 Xe3 cores, while the 9 386H has a smaller 4‑Xe3 iGPU but adds vPro eligibility. Both share the same 16‑core CPU configuration and similar clocks.