A leaked Cinebench R23 run suggests Intel’s Core Ultra 7 251HX can deliver better efficiency than the older Core i9 14900HX, even though it has fewer cores and sits below the Core Ultra 7 255HX in Intel’s Arrow Lake HX lineup.
The Core Ultra 7 251HX is an 18 core laptop processor with 6 Performance cores and 12 Efficient cores. It was introduced as a middle option between the Core Ultra 5 245HX and Core Ultra 7 255HX. Since the 255HX has more Performance cores, it is expected to stay ahead in heavy multi core workloads.
The leaked Cinebench result points to better performance per watt at lower power limits
The leaked test shows the Core Ultra 7 251HX reaching nearly 30,000 points in Cinebench R23 multi threaded testing at around 140W. That puts it close to the Core i9 14900HX, which was Intel’s flagship Raptor Lake Refresh laptop chip with 24 cores and 32 threads.
The more interesting result appears at lower power levels. At around 50W, the Core Ultra 7 251HX reportedly crosses 20,000 points, while the Core i9 14900HX is closer to 18,000 points. The Arrow Lake HX chip also keeps a lead at around 70W, before the gap becomes much smaller near 100W.
That means the Core Ultra 7 251HX may offer stronger efficiency in laptops where power and cooling limits matter. This is important because gaming and workstation laptops often run below their highest possible power levels depending on the chassis, cooling system, and battery settings.
| Processor | Core layout | Position in lineup | Leaked performance note |
|---|---|---|---|
| Core Ultra 7 251HX | 6P plus 12E | Mid range Arrow Lake HX | Stronger efficiency than Core i9 14900HX at lower wattage |
| Core Ultra 7 255HX | 8P plus 12E | Higher than 251HX | Faster in multi core tests due to extra P cores |
| Core i9 14900HX | 8P plus 16E | Older flagship Raptor Lake Refresh | Similar peak score, but weaker efficiency at lower power |
The Core Ultra 7 251HX also has lower clock speeds than the Core i9 14900HX, which makes its lower power performance more notable. However, the leak still shows it trailing the Core Ultra 7 255HX, which is expected because the 255HX has two more Performance cores.
For laptop buyers, the result suggests that the Core Ultra 7 251HX could be a practical option in high performance laptops if pricing and cooling are handled well. It may not be the fastest Arrow Lake HX chip, but early leaked numbers point to a processor that can compete well against Intel’s older flagship while using power more efficiently.
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