Core i7-1255U vs Core Ultra 5 134U
Core i7-1255U
Core Ultra 5 134U
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i7-1255U
Performance Per Dollar Core Ultra 5 134U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i7-1255U | Core Ultra 5 134U |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | ✨ Modern (Alder Lake-U (2022) / Intel 7 nm) | ✨ Modern (Meteor Lake-U (2023) / 7 nm) |
💎 Value Proposition
| Insight | Core i7-1255U | Core Ultra 5 134U |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | Equivalent pricing | Equivalent pricing |
Performance Check
To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.
Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.
Technical Specifications
Side-by-side comparison of Core i7-1255U and Core Ultra 5 134U
Core i7-1255U
The Core i7-1255U is manufactured by Intel. It was released in 23 February 2022 (3 years ago). It is based on the Alder Lake-U (2022) architecture. It features 10 cores and 12 threads. Base frequency is 1.7 GHz, with boost up to 4.7 GHz. L3 cache: 12 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: FCBGA1744. Thermal design power (TDP): 15 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 13,128 points. Launch price was $149.
Core Ultra 5 134U
The Core Ultra 5 134U is manufactured by Intel. It was released in 14 December 2023 (1 year ago). It is based on the Meteor Lake-U (2023) architecture. It features 12 cores and 14 threads. Base frequency is 0.7 GHz, with boost up to 4.4 GHz. L3 cache: 12 MB (total). L2 cache: 2 MB (per core). Built on 7 nm process technology. Socket: FCBGA2551. Thermal design power (TDP): + 12 MB. Memory support: DDR5. Passmark benchmark score: 13,169 points. Launch price was $332.
Processing Power
The Core i7-1255U packs 10 cores / 12 threads, while the Core Ultra 5 134U offers 12 cores / 14 threads — the Core Ultra 5 134U has 2 more cores. Boost clocks reach 4.7 GHz on the Core i7-1255U versus 4.4 GHz on the Core Ultra 5 134U — a 6.6% clock advantage for the Core i7-1255U (base: 1.7 GHz vs 0.7 GHz). The Core i7-1255U uses the Alder Lake-U (2022) architecture (Intel 7 nm), while the Core Ultra 5 134U uses Meteor Lake-U (2023) (7 nm). In PassMark, the Core i7-1255U scores 13,128 against the Core Ultra 5 134U's 13,169 — a 0.3% lead for the Core Ultra 5 134U. Both processors carry 12 MB (total) of L3 cache.
| Feature | Core i7-1255U | Core Ultra 5 134U |
|---|---|---|
| Cores / Threads | 10 / 12 | 12 / 14+20% |
| Boost Clock | 4.7 GHz+7% | 4.4 GHz |
| Base Clock | 1.7 GHz+143% | 0.7 GHz |
| L3 Cache | 12 MB (total) | 12 MB (total) |
| L2 Cache | 1.25 MB (per core) | 2 MB (per core)+60% |
| Process | Intel 7 nm | 7 nm |
| Architecture | Alder Lake-U (2022) | Meteor Lake-U (2023) |
| PassMark | 13,128 | 13,169 |
| Geekbench 6 Single | 1,809 | — |
Memory & Platform
The Core i7-1255U uses the FCBGA1744 socket (PCIe 5.0), while the Core Ultra 5 134U uses FCBGA2551 (PCIe 5.0) — making them incompatible on the same motherboard.
| Feature | Core i7-1255U | Core Ultra 5 134U |
|---|---|---|
| Socket | FCBGA1744 | FCBGA2551 |
| PCIe Generation | PCIe 5.0 | PCIe 5.0 |
| Max RAM Speed | DDR5-4800 | — |
| Max RAM Capacity | 64 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 20 | — |
Advanced Features
Virtualization: VT-x, VT-d, EPT (Core i7-1255U) / not specified (Core Ultra 5 134U). The Core i7-1255U includes integrated graphics (Iris Xe Graphics 96EU), while the Core Ultra 5 134U requires a dedicated GPU. Primary use case: Core i7-1255U targets Mainstream Laptop. Direct competitor: Core i7-1255U rivals Ryzen 7 6800U.
| Feature | Core i7-1255U | Core Ultra 5 134U |
|---|---|---|
| Integrated GPU | Yes | — |
| IGPU Model | Iris Xe Graphics 96EU | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | VT-x, VT-d, EPT | — |
| Target Use | Mainstream Laptop | — |
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