Intel Core Ultra 7 251HX
Also called intel core ultra 7 251hx, core ultra 7 251hx, 251hx, core-ultra-7-251hx
Intel Core Ultra 7 laptop processor on Arrow Lake, with 18 cores and 18 threads and 30720 KB L2, 30 MB L3 at 55 W TDP on a 3 nm process addressing up to 256 GB and Intel Graphics.
What you need to know
Still a capable laptop cpu.
Intel Core Ultra 7 251HX launched in January 1, 2026., It has 18 cores and 18 threads on Arrow Lake, dropping into the FCBGA2114 socket. It is no longer the newest SKU in every store, but the chip is still useful when the rest of the PC keeps up.
- Still good?
- Yes, for most work this class is sold for
- Product age
- Less than a year old
- Upgrade pressure
- Low
What this hardware means today
Age and usefulness are not the same number. This page keeps them separate.
- Performance today
- Excellent. Laptop performance depends on the OEM power limit as much as this SKU name.
- Product age 0 years old
- Current generation. Launched January 1, 2026. Newer platforms exist. That does not make this chip unusable by itself.
- Support status
- Supported. Current Windows and current applications still run on this class of CPU. Platform BIOS support depends on the motherboard or laptop vendor.
- Upgrade pressure
- Low. Upgrade pressure is low unless you need a different platform feature.
Where does it sit?
Arrow Lake sits on Intel's recent Core timeline. Later desktop branding moved toward Core Ultra.
Performance context
These are qualitative readings, not a fake 8.7 out of 10. Workload still wins.
Gaming: Very Good
Fine when the laptop GPU is the limit. CPU names on thin laptops often are not.
Productivity: Excellent
18 cores cover office, browser, and compile work in this class.
Multithreaded workloads: Good
18 threads. Heavy encodes still scale further on higher-core parts.
General use: Excellent
Everyday Windows use is not where most people notice this SKU first.
Efficiency: Depends on the laptop
The same SKU in two laptops can draw very different power. Read the device, not the CPU name alone.
Should you upgrade?
Probably not if this chip already matches your work.
Upgrade makes more sense if
- Your workload is strongly CPU limited
- You need a newer platform for memory, I/O, or chipset features
- You need substantially more multicore performance
- You are buying a whole new laptop anyway
Upgrade makes less sense if
- The GPU is the real bottleneck
- Current applications are already responsive
- The CPU rarely limits your workload
Specifications
Figures below follow the Feex Hardware Database record for this SKU. Fields without a recorded value are omitted.
Processor
Intel Core Ultra 7 251HX is built on Arrow Lake using a 3 nm process.
| Manufacturer | Intel |
|---|---|
| Family | Core Ultra 7 |
| Architecture | Arrow Lake |
| Generation | Intel Core Ultra Processors (Series 2) |
| Manufacturing process | 3 nm |
| Segment | Laptop |
Cores and threads
Intel Core Ultra 7 251HX has 18 cores and 18 threads.
| Cores | 18 (6 P-cores + 12 E-cores) |
|---|---|
| P-cores | 6 |
| E-cores | 12 |
| Threads | 18 |
| Hybrid architecture | Yes |
Clock speeds
Base clock is 2.9 GHz. Boost reaches 5.1 GHz.
| Base frequency | 2.9 GHz |
|---|---|
| Max boost | 5.1 GHz |
Cache
Cache on this sheet is 30 MB L3.
| L2 cache | 30720 KB |
|---|---|
| L3 cache | 30 MB |
| Total cache | 60 MB |
Memory
Intel Core Ultra 7 251HX addresses 256 GB across 2 memory channels.
| Supported types | DDR5 |
|---|---|
| Max capacity | 256 GB |
| Channels | 2 |
Package and power
Intel Core Ultra 7 251HX uses the FCBGA2114 socket and a 55 W TDP.
| Socket | FCBGA2114 |
|---|---|
| TDP | 55 W |
| PCIe | Revision 5.0, 24 lanes |
Integrated graphics
Intel Core Ultra 7 251HX includes Intel Graphics.
| Integrated graphics | Intel Graphics |
|---|
Market
Intel Core Ultra 7 251HX launched January 1, 2026.
| Launch date | January 1, 2026 |
|---|---|
| Model | 251HX |
Features
Intel Core Ultra 7 251HX records 8 instruction sets on this sheet.
| Instruction sets | AES-NIAVX2AVXAVX-VNNISHA64-bit (x86-64)SSE4.1SSE4.2 |
|---|---|
| Security | Control-flow Enforcement (CET)Execute Disable (NX)Boot GuardHardware RNGOS GuardMode-Based Execute Control |
| Virtualization | Extended Page Tables (EPT)VT-d (DMA Remapping)VT-x (Hardware Virtualization) |
| AI acceleration | Neural Processing Unit (NPU)Deep Learning BoostGaussian Neural Accelerator |
Compatibility
| Socket | FCBGA2114 |
|---|---|
| Board | A shared socket is not automatic compatibility. Check the motherboard CPU list and BIOS revision. |
| Memory | DDR5, up to 256 GB |
| Graphics | Intel Graphics |
A shared socket is not automatic compatibility. Boards often need a BIOS update before a newer chip in the same socket will post.
Laptop power limits, cooling, and the OEM firmware matter as much as the model name.
Read the memory list on the board. The CPU can list more standards than one motherboard will accept.
No post after a CPU swap
Clear CMOS only after you confirm the board list includes this SKU and the BIOS is new enough. A supported name on a box is not the same as a flashed board.
Sources and verification
Reviewed by Feex editorial. Last verified August 2026 Status: Partially Verified. How we research.
- Feex Hardware Database · Specification source used for this sheet. CC BY 4.0.
Was this article useful?
A yes or no is enough. Pick a reason if you want, or add a short note.
Thanks. That helps us improve this page.