Core Ultra 7 155H vs Core Ultra 7 255H: specs and benchmark comparison
Short verdict
Intel Core Ultra 7 255H leads in every scenario with comparable benchmarks: multi-thread performance. This does not imply an advantage in tasks without benchmarks.
Compare with AIMulti-thread performance
B +41.8%Intel Core Ultra 7 255H leads in this scenario (up to 41.8% in comparable benchmarks).
No comparable benchmarks yet: single-thread performance, gaming (cpu-bound scenarios), power efficiency.
Advantages
Only measured and rated values: a noticeable benchmark gap and specs where more is better.
Where Core Ultra 7 155H is better1
Threads 6 more22 vs 16
Where Core Ultra 7 255H is better3
Blender Benchmark 4.5.0 41.8% faster213 samples/min vs 150 samples/min
Official memory speed 800 MT/s more6,400 MT/s vs 5,600 MT/s
Max memory capacity 32 GB more128 GB vs 96 GB
Benchmarks
Results are compared within one benchmark, one version and the same conditions. Laptop chip results depend on the laptop model: its maker sets the power limit and cooling.
- B ahead by 41.8%
Blender Benchmark 4.5.0
CPU, sum of scenes monster + junkshop + classroom · samples/min, higher is better
Core Ultra 7 155H150.1 samples/minCore Ultra 7 255H212.9 samples/minPosition among tested models (89)
A · 150B · 2130200400600800Each dot is one model’s median in this benchmark. The scale starts at zero, samples/min. Intel Core Ultra 7 255H is ahead by 41.8% in this benchmark.
About the measurement and source
- A · Intel Core Ultra 7 155H
150.1 samples/min · community measurement, sample 58 · November 15, 2026
Blender Open Data (Blender Foundation)
Median of 58 submissions (1 outliers excluded), interquartile range 124.22–175.9; submissions 2025-07-23 to 2026-03-04; CPU backend. Snapshot 2026-11-15.
- B · Intel Core Ultra 7 255H
212.9 samples/min · community measurement, sample 30 · November 15, 2026
Blender Open Data (Blender Foundation)
Median of 30 submissions (0 outliers excluded), interquartile range 161.85–248.57; submissions 2025-07-17 to 2026-03-08; CPU backend. Snapshot 2026-11-15.
difference = |A − B| ÷ the smaller value × 100%. The 5% noticeable threshold is a UX heuristic, not statistical significance.
Cycles render in Blender Benchmark. Median of the sum of samples per minute over three scenes after removing outliers.
Reference results (14)
| Benchmark | A | B | Difference |
|---|---|---|---|
| Blender Benchmark 4.2.0CPU, sum of scenes monster + junkshop + classroom | 180.2 | 245.8 | reference |
| Blender Benchmark 5.1.1CPU, sum of scenes monster + junkshop + classroom | 178.7 | 175.1 | reference |
| Blender Benchmark 5.2.0CPU, sum of scenes monster + junkshop + classroom | 167.1 | 207.5 | reference |
| Blender Benchmark 3.2.1CPU, sum of scenes monster + junkshop + classroom | 181.3 | — | no pair |
| Blender Benchmark 3.4.0CPU, sum of scenes monster + junkshop + classroom | 142.3 | — | no pair |
| Blender Benchmark 3.5.0CPU, sum of scenes monster + junkshop + classroom | 180.1 | — | no pair |
| Blender Benchmark 3.6.0CPU, sum of scenes monster + junkshop + classroom | 105.2 | 247.6 | reference |
| Blender Benchmark 4.0.0CPU, sum of scenes monster + junkshop + classroom | 172 | — | no pair |
| Blender Benchmark 4.1.0CPU, sum of scenes monster + junkshop + classroom | 177.3 | — | no pair |
| Blender Benchmark 4.3.0CPU, sum of scenes monster + junkshop + classroom | 148.1 | 274.5 | reference |
| Blender Benchmark 4.4.0CPU, sum of scenes monster + junkshop + classroom | 152.2 | 212 | reference |
| Blender Benchmark 5.0.0CPU, sum of scenes monster + junkshop + classroom | 175.1 | 199.1 | reference |
| Blender Benchmark 5.1.0CPU, sum of scenes monster + junkshop + classroom | 124.9 | 234.7 | reference |
| Blender Benchmark 5.3.0CPU, sum of scenes monster + junkshop + classroom | 223 | — | no pair |
Each benchmark version has its own scale: numbers are compared only within a row.
Specifications
Chip maker values. The laptop maker sets the power limit and clocks in each laptop.
| Specification | A · Core Ultra 7 155H | B · Core Ultra 7 255H | Difference |
|---|---|---|---|
| Cores and clocks | |||
| CoresCores of different types may differ in performance. | 16 (6P + 10E) | 16 (6P + 10E) | equal |
| Threads | 22 | 16 | A: 6 more |
| Base clockFor hybrid Intel CPUs, the P-core base clock is shown. | 1.4 GHz | 2 GHz | B: 0.6 GHz more |
| Max clock (Boost/Turbo) | 4.8 GHz | 5.1 GHz | B: 0.3 GHz more |
| Cache | |||
| L3 cache | 24 MB | 24 MB | equal |
| Platform | |||
| Socket | FCBGA2049 | FCBGA2049 | equal |
| Memory and interfaces | |||
| Memory type | DDR5, LPDDR5/x | DDR5, LPDDR5/x | equal |
| Memory channels | 2 | 2 | equal |
| Official memory speedFor controllers that support two generations, the speed for the newer memory type is shown. | 5,600 MT/s | 6,400 MT/s | B: 800 MT/s more |
| Max memory capacity | 96 GB | 128 GB | B: 32 GB more |
| PCI Express | PCIe 5.0 and 4.0, 28 lanes | PCIe 5.0 and 4.0, 28 lanes | equal |
| Integrated graphics | Intel Arc graphics | Intel Arc 140T GPU | differs |
| Power | |||
| Processor Base Power (Intel) | 28 W | 28 W | equal |
| Maximum Turbo Power (Intel) | 115 W | 115 W | equal |
| Minimum Assured Power (Intel)The lower bound to which the laptop maker can reduce the CPU’s base power. | 20 W | 20 W | equal |
Cores and clocks
Cores
A16 (6P + 10E)
B16 (6P + 10E)
equalCores of different types may differ in performance.
Threads
A22
B16
A: 6 moreBase clock
A1.4 GHz
B2 GHz
B: 0.6 GHz moreFor hybrid Intel CPUs, the P-core base clock is shown.
Max clock (Boost/Turbo)
A4.8 GHz
B5.1 GHz
B: 0.3 GHz more
Cache
L3 cache
A24 MB
B24 MB
equal
Platform
Socket
AFCBGA2049
BFCBGA2049
equal
Memory and interfaces
Memory type
ADDR5, LPDDR5/x
BDDR5, LPDDR5/x
equalMemory channels
A2
B2
equalOfficial memory speed
A5,600 MT/s
B6,400 MT/s
B: 800 MT/s moreFor controllers that support two generations, the speed for the newer memory type is shown.
Max memory capacity
A96 GB
B128 GB
B: 32 GB morePCI Express
APCIe 5.0 and 4.0, 28 lanes
BPCIe 5.0 and 4.0, 28 lanes
equalIntegrated graphics
AIntel Arc graphics
BIntel Arc 140T GPU
differs
Power
Processor Base Power (Intel)
A28 W
B28 W
equalMaximum Turbo Power (Intel)
A115 W
B115 W
equalMinimum Assured Power (Intel)
A20 W
B20 W
equalThe lower bound to which the laptop maker can reduce the CPU’s base power.
“More” does not always mean “better”: higher power draw or size is a system requirement, not an advantage (such bars are dimmed).
Compare with AI
An AI model reviews the specs and benchmarks of this pair and gives a plain-language verdict on who each model suits.
Questions and answers
Do Intel Core Ultra 7 155H and Intel Core Ultra 7 255H fit the same motherboard?
Both CPUs use the FCBGA2049 socket. Support on a specific board depends on the chipset and BIOS version, so check the board maker’s CPU support list.
How many cores and threads do Intel Core Ultra 7 155H and Intel Core Ultra 7 255H have?
Intel Core Ultra 7 155H: 16 cores / 22 threads. Intel Core Ultra 7 255H: 16 cores / 16 threads (manufacturer data).
Do these CPUs have integrated graphics?
Intel Core Ultra 7 155H: Intel Arc graphics. Intel Core Ultra 7 255H: Intel Arc 140T GPU.
Which is faster: Intel Core Ultra 7 155H or Intel Core Ultra 7 255H?
Intel Core Ultra 7 255H leads in every scenario with comparable benchmarks: multi-thread performance. This does not imply an advantage in tasks without benchmarks.
See also
Data sources (2)
- Intel — specifications of Intel Core Ultra 7 155H, specifications of Intel Core Ultra 7 255Hchecked November 7, 2026
- Blender Open Data (Blender Foundation) — benchmark Blender Benchmark 4.2.0, benchmark Blender Benchmark 4.5.0, benchmark Blender Benchmark 5.1.1, benchmark Blender Benchmark 5.2.0, benchmark Blender Benchmark 3.2.1, benchmark Blender Benchmark 3.4.0, benchmark Blender Benchmark 3.5.0, benchmark Blender Benchmark 3.6.0, benchmark Blender Benchmark 4.0.0, benchmark Blender Benchmark 4.1.0, benchmark Blender Benchmark 4.3.0, benchmark Blender Benchmark 4.4.0, benchmark Blender Benchmark 5.0.0, benchmark Blender Benchmark 5.1.0, benchmark Blender Benchmark 5.3.0checked November 14, 2026
How we compare: methodology. Where the data comes from: sources.