CPU Comparison
Intel Core 5 120U vs Intel Core 5 315
A side-by-side comparison of specs, performance and value. A 15-watt, 10-core (2P+8E) mobile processor from Intel’s Core (Series 1) lineup built on the Intel 7 process. It pairs high P-core boost clocks up to 5.0 GHz with an 80 EU Iris Xe iGPU, dual-channel DDR4/DDR5 or LPDDR4x/LPDDR5 memory, and up to 20 total PCIe lanes, targeting everyday thin-and-light laptops.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Handles office suites, browsers with many tabs, and light creative workflows well. Multi-thread performance is limited by the 15W PL1 and lack of Hyper-Threading on E-cores.
Handles standard office suites flawlessly, but the 6-thread limit causes slowdowns in heavy spreadsheet calculations or large file processing.
Gaming
Fine for esports and older/light titles at 1080p with low–medium settings; not intended for AAA gaming at high settings.
While Xe3 graphics are powerful, the single-channel memory bottleneck severely limits frame rates in modern 3D games.
Virtualization
Can run light VMs for development or testing, but limited core count and memory bandwidth constrain heavier workloads.
Efficiency
The 15W base power and Intel 7 process help thin-and-lights achieve long battery life in typical office use, especially with LPDDR memory.
The 3nm compute tile and lack of SMT result in class-leading performance-per-watt for everyday tasks.
Specialized Performance
AI / ML
- No dedicated NPU; AI workloads rely on CPU and GPU.
- Intel DL Boost (VNNI) is supported on the CPU, enabling some acceleration for inference.
- Suitable for small-scale, occasional local inference; not intended for heavy AI training or large LLM serving.
- Meets the 40+ TOPS requirement when including CPU and GPU contributions
- NPU 5 is highly efficient for sustained AI tasks
- Excellent for local Copilot+ PC features
Content Creation
Gaming
- Integrated Iris Xe 80 EU is sufficient for e-sports titles and older games at 1080p.
- Modern AAA titles will generally require low settings and may still struggle; not a gaming-focused part.
- Single-channel memory heavily restricts iGPU bandwidth
- Xe3 architecture shows promise for esports titles at low settings
- Not intended as a gaming processor
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- Good single-thread performance for office and browsing at 15W.
- Modern I/O with Thunderbolt 4 and PCIe 4.0 from the CPU.
- Flexible memory support (DDR4/DDR5 and LPDDR variants) up to 96 GB.
- Integrated Iris Xe 80 EU GPU with AV1 decode and multi-display support.
- Business features (vPro Essentials eligibility, TXT, Boot Guard, CET) on supported systems.
Cons
- Only 15W base power; multi-core throughput is limited under sustained loads.
- No Hyper-Threading on E-cores; long multi-thread tasks don’t scale as well as higher-TDP parts.
- No dedicated NPU for AI workloads.
- Gaming performance is limited to light or older titles.
- Locked multiplier; no enthusiast overclocking.
Pros
- Class-leading 3nm power efficiency
- Strong 35 TOPS combined AI performance
- Modern Xe3 integrated graphics architecture
- Extremely low 15W base power draw
- High-speed LPDDR5X memory support
Cons
- Restricted to single-channel memory only
- No Hyper-Threading limits multi-tasking
- Only six PCIe 4.0 lanes available
- Base 6 threads will struggle with heavy workloads
- Priced at a premium $340 for a 6-thread chip
Competitors & Alternatives
Intel Core 5 120U
- AMD Ryzen 5 7530URival
Thin-and-light 15W mobile
- AMD Ryzen 5 7535URival
Thin-and-light 15W mobile
- Intel Core i5-1335URival
13th Gen Raptor Lake-U 15W
- Intel Core i5-1345URival
13th Gen Raptor Lake-U 15W
- Apple M2 (7-core or 8-core GPU)Rival
Thin-and-light ARM-based laptop
- Intel Core Ultra 5 125U (Arrow Lake)Alt
Newer architecture with an NPU and more modern features if AI features and efficiency are priorities.
Intel Core 5 315
- AMD Ryzen AI 5 340Rival
Mobile Efficiency
- Compare head-to-headApple M4Rival
Premium Mobile
- Qualcomm Snapdragon X PlusRival
ARM Mobile
- AMD Ryzen 5 8540URival
Mainstream Mobile
- MediaTek Kompanio 1400TRival
Chromebook / ARM Mobile
- Intel Core 7 335Alt
Offers more P-Cores, multi-channel memory support, and higher thread counts for heavier workloads.
- Apple M4 Base ModelAlt
Superior unified memory architecture and unmatched single-thread efficiency in a similar power bracket.
- Intel Core 5 225Alt
A potential budget alternative if the Xe3 graphics and 3nm process are not strictly required.
Our Verdict on Each
A competent 15W chip that delivers snappy day-to-day performance and solid battery life in mainstream laptops, but it’s not built for sustained heavy workloads or AAA gaming. The 2P+8E layout and 5.0 GHz P-core boost are strong for the segment; the 80 EU iGPU handles everyday graphics and light gaming adequately. Choose it for everyday work and study rather than intensive creator tasks.
Best for: Everyday productivity, study, and light creative work in a thin-and-light laptop where battery life and cost matter more than peak multi-core performance.
Read the full reviewA highly efficient 3nm mobile chip that excels in battery life and AI tasks, though the lack of Hyper-Threading and single-channel memory limit its heavy multi-threaded potential.
Best for: Purchasing an ultra-portable laptop for everyday tasks, office work, and AI features where battery life is the top priority.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core 5 120U or Intel Core 5 315?
Based on our editorial ratings, the Intel Core 5 315 comes out ahead with a score of 7.5/10. That said, the best choice depends on your workload — check the spec and performance breakdown above for gaming, productivity and efficiency differences.
Which is faster for gaming, Intel Core 5 120U or Intel Core 5 315?
For gaming, the Intel Core 5 120U leads with a gaming performance score of 55/100 among Intel Core 5 120U and Intel Core 5 315.
Do Intel Core 5 120U and Intel Core 5 315 use the same socket?
No. They use different sockets (Intel Core 5 120U: FCBGA1744 (Intel BGA 1744), Intel Core 5 315: Intel BGA 1516), so each needs a compatible motherboard.
Which has more cores?
The Intel Core 5 120U has the most cores. Core counts: Intel Core 5 120U (10 cores), Intel Core 5 315 (6 cores).
Which is faster in multi-core benchmarks?
The Intel Core 5 120U posts the highest multi-core benchmark score. Multi-core results: Intel Core 5 120U (9,946), Intel Core 5 315 (0). Benchmark figures are approximate and workload-dependent.