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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Ultra 7 255HX vs Ultra 9 275HX

The Intel Core Ultra 7 255HX is newer than Intel Core Ultra 9 275HX and is around -12% slower in multi-threaded (CPU Mark) testing. However the CPUs have comparable single-thread rating. Both CPUs operates at simliar power levels (TDP). All the CPUs in this comparison belong in the Laptop CPU Class. The values below were tabulated from a combined 3857 benchmarks submitted from our PerformanceTest software and results and are updated daily to include new submissions.

  • The first section will show basic information for each CPU selected.
  • The additional graphs shows the CPU Mark and Single Thread values of each CPU selected.
  • An accompany graph, if price data is available, will shows the value for money, in terms of the CPU Mark/Thread Rating per dollar.
  • The last section will show approximate yearly running costs for the CPUs.

×Intel Core Ultra 7 255HX×Intel Core Ultra 9 275HX+ ADD
Price Search Online Search Online
Socket TypeFCBGA2114FCBGA2114
CPU ClassLaptopLaptop
Clockspeed2.4 GHz2.7 GHz
Turbo SpeedUp to 5.2 GHzUp to 5.4 GHz
# of Physical Cores20 (Threads: 20)24 (Threads: 24)
CacheL1: 2,048KB, L2: 36.0MB, L3: 30MBL1: 2,432KB, L2: 40.0MB, L3: 36MB
TDP55W55W
Yearly Running Cost$10.04$10.04
OtherIntel Graphics, Intel AI BoostIntel Graphics, Intel AI Boost
First Seen on ChartQ2 2025Q1 2025
# of Samples5053352
CPU Rank245198
CPU Value0.00.0
Single Thread Rating(% diff. to max in group)4596(-3.0%)4739(0.0%)
CPU Mark(% diff. to max in group)49267(-12.1%)56074(0.0%)

CPU Mark Rating
As of 7th of February 2026 - Higher results represent better performance
Intel Core Ultra 7 255HX
49,267
Intel Core Ultra 9 275HX
56,074
PassMark Software © 2008-2026
CPU Single Thread Rating
As of 7th of February 2026 - Higher results represent better performance
Intel Core Ultra 7 255HX
4,596
Intel Core Ultra 9 275HX
4,739
PassMark Software © 2008-2026
Estimated Energy Usage Cost
Estimated Energy Adjustable Values
Average hours of use per day Average CPU Utilization (0-100%)1 Power cost, $ per kWh2
8
25
1Average user usage is typically low and can vary from task to task. An estimate load 25% is nominal.
2Typical power costs vary around the world. Check your last power bill for details. Values of $0.15 to $0.45 per kWh are typical.
Intel Core Ultra 7 255HX Intel Core Ultra 9 275HX
Max TDP55W55W
Power consumption per day (kWh)NANA
Running cost per dayNANA
Power consumption per year (kWh)NANA
Running cost per yearNANA
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.