CPU Comparison
Core i5-11400T vs Intel Core Ultra 5 125UL
A side-by-side comparison of specs, performance and value. The Intel Core i5-11400T is a low-power desktop processor based on the Rocket Lake-S architecture, designed for small form factor (SFF) PCs and compact office setups. Released in March 2021, this 14nm chip features 6 cores and 12 threads, providing a balance of multitasking capability and energy efficiency. With a remarkably low base frequency of 1.3 GHz and a maximum turbo of 3.7 GHz, it is tailored for environments where thermal constraints and power consumption are primary concerns. The processor operates at a TDP of just 35W, significantly lower than the standard 65W desktop models. It includes 12MB of L3 cache and supports PCIe 4.0 with 20 lanes, allowing for high-speed storage and expansion even in compact builds. While not intended for high-end gaming, the i5-11400T is perfectly suited for home theater PCs (HTPCs), office workstations, and entry-level systems where quiet operation and low heat output are prioritized over raw computational power.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Handles office tasks well, but slower for heavy processing.
Good for standard office applications and web tasks.
Gaming
Not suitable for modern gaming due to low base clock.
Not intended for modern gaming.
Virtualization
Adequate for light VMs, but limited by clocks.
Can run light VMs, but limited by core clock speeds.
Efficiency
Exceptional power efficiency with a 35W TDP.
Outstanding efficiency for 24/7 low-power operation.
Specialized Performance
AI / ML
- AVX-512 support included
- Low clocks limit AI inference performance
- Not recommended for machine learning
- NPU is highly beneficial for edge AI
- 11 TOPS is sufficient for vision models
- Low power AI inference
Content Creation
Gaming
- Low base clock heavily bottlenecks modern GPUs
- Suitable only for older or 2D games
- Best paired with low-end discrete graphics or iGPU
- Not built for gaming
- Graphics clocked lower than mobile H-series
- Fine for 2D indie titles
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- Extremely low 35W TDP
- Supports PCIe 4.0
- 6 cores for solid multitasking
- Quiet operation potential
Cons
- Very low base clock (1.3 GHz)
- Not suitable for gaming
- Locked multiplier
- Uses older 14nm process
Pros
- Extremely low power consumption
- Socketed design allows for upgrades
- Integrated NPU for edge AI
- 64EU Arc graphics for multi-display
- Excellent for silent PC builds
Cons
- Low base clock speeds
- Not suitable for gaming
- Locked multiplier
- Overkill for basic office tasks if budget is tight
Competitors & Alternatives
Core i5-11400T
- AMD Ryzen 5 5600GERival
Desktop
- AMD Ryzen 5 4600GERival
Desktop
- Intel Core i5-10400TRival
Desktop
- Intel Core i3-10100TRival
Desktop
- AMD Ryzen 3 4300GERival
Desktop
- Intel Core i5-11400Alt
Offers higher base clocks and 65W TDP for better performance.
- AMD Ryzen 5 5600GAlt
Much better integrated graphics and similar power efficiency.
Newer Alder Lake alternative with better single-core speed.
Compare head-to-head- Intel Core i5-12400TAlt
A newer 12th gen alternative with improved IPC and efficiency.
- AMD Ryzen 5 4600GAlt
A reliable budget APU with strong integrated graphics.
Intel Core Ultra 5 125UL
- AMD Ryzen 5 8600GERival
Desktop
- AMD Ryzen 5 8640URival
Mobile/Embedded
- Compare head-to-headIntel Core Ultra 5 135ULRival
Desktop
- AMD Ryzen 5 PRO 7640URival
Mobile/Embedded
- Compare head-to-headIntel Core i5-14400TRival
Desktop
- Intel N100Alt
Much cheaper for basic tasks, though no NPU.
- AMD Ryzen 5 5600GEAlt
Older but proven budget mini-PC option.
Our Verdict on Each
An excellent low-TDP processor for SFF builds, offering 6 cores and PCIe 4.0 with minimal heat output.
Best for: The Intel Core i5-11400T is highly recommended for builders constructing a small form factor PC, home theater PC, or a silent office workstation. Its 35W TDP means it can be cooled passively or with a low-RPM fan, ensuring a completely silent computing experience. It is perfect for 1080p media playback, light office work, and web browsing. However, it is not advisable for gaming or heavy content creation, as its low base clock of 1.3 GHz will bottleneck modern GPUs and slow down rendering tasks significantly. If your primary goal is a compact, energy-efficient system that runs 24/7 without generating excess heat, the 11400T is an excellent choice. Just ensure you pair it with fast NVMe storage to leverage the PCIe 4.0 lanes, maximizing system responsiveness for everyday tasks.
Read the full reviewA highly efficient socketed desktop CPU perfect for SFF builds and edge devices, though not for gaming or heavy workloads.
Best for: The Core Ultra 5 125UL is not intended for standard consumer desktop builds, and its value proposition is highly specific. If you are building a home server, a plex media server, a fanless mini-PC, or an edge computing node, the 125UL is an outstanding choice. Its 12W minimum TDP allows for completely silent operation, while the 64EU iGPU excels at hardware transcoding. The NPU is a significant bonus for localized AI inference in IoT applications. However, for a standard gaming or productivity desktop, this processor is a poor choice due to its low base clock and constrained power limits compared to standard desktop CPUs. Ensure your use case demands low power and edge AI before investing in the 125UL on the LGA 1851 platform.
Read the full reviewFrequently Asked Questions
Which is better, Core i5-11400T or Intel Core Ultra 5 125UL?
Based on our editorial ratings, the Intel Core Ultra 5 125UL comes out ahead with a score of 8/10. That said, the best choice depends on your workload — check the spec and performance breakdown above for gaming, productivity and efficiency differences.
Which uses less power?
The Intel Core Ultra 5 125UL has the lowest rated TDP. Power draw across these chips: Core i5-11400T (35 W), Intel Core Ultra 5 125UL (15 W).
Do Core i5-11400T and Intel Core Ultra 5 125UL use the same socket?
No. They use different sockets (Core i5-11400T: Intel Socket 1200, Intel Core Ultra 5 125UL: Intel Socket 1851), so each needs a compatible motherboard.
Which has more cores?
The Intel Core Ultra 5 125UL has the most cores. Core counts: Core i5-11400T (6 cores), Intel Core Ultra 5 125UL (12 cores).