Quick Verdict
An excellent low-TDP processor for SFF builds, offering 6 cores and PCIe 4.0 with minimal heat output.
Overview
Launch
2021
Status
End-of-lifeGeneration
11th Generation
Market
Desktop
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.
Featuring 6 cores, 12 threads, and a 35W TDP, the i5-11400T is ideal for SFF and HTPC builds where cooling and power efficiency are paramount.
Specifications
Performance
Handles office tasks well, but slower for heavy processing.
Adequate for light VMs, but limited by clocks.
Not suitable for modern gaming due to low base clock.
Exceptional power efficiency with a 35W TDP.
- •Low base clock heavily bottlenecks modern GPUs
- •Suitable only for older or 2D games
- •Best paired with low-end discrete graphics or iGPU
- •AVX-512 support included
- •Low clocks limit AI inference performance
- •Not recommended for machine learning
Architecture
14nm
Process Node
Rocket Lake
Codename
6C / 12T
Core Config
12 MB
L3 Cache
35 W
TDP
Architecture Overview
The Core i5-11400T is built on Intel's Rocket Lake architecture, utilizing the 14nm process node. Interestingly, Rocket Lake utilizes a Cypress Cove core design, which is essentially a backported version of the 10nm Sunny Cove architecture to the 14nm process. This brings improved IPC (Instructions Per Clock) over the previous Comet Lake generation, despite the older manufacturing node. The 11400T features 6 cores and 12 threads, with 12MB of L3 cache. It supports dual-channel DDR4-3200 memory and provides 20 PCIe 4.0 lanes, a first for Intel desktop platforms, enabling faster GPU and NVMe SSD connectivity. The low 35W TDP is achieved through aggressive frequency binning and power management, making it ideal for passive cooling or ultra-quiet fans. The integrated UHD Graphics 730 handles basic display outputs smoothly, ensuring the chip remains versatile for multimedia consumption and standard office applications in space-constrained environments.
CPU Design
6 Cypress Cove cores with Hyper-Threading.
Memory Subsystem
Dual-channel DDR4-3200.
PCIe & I/O
20 PCIe 4.0 lanes.
Overclocking
Locked multiplier.
- Added PCIe 4.0 support
- Improved IPC via Cypress Cove
- Faster native memory speed (3200 MT/s)
Key Highlights
- Extremely low 35W TDP
- Supports PCIe 4.0
- 6 cores for solid multitasking
- Quiet operation potential
- Very low base clock (1.3 GHz)
- Not suitable for gaming
- Locked multiplier
- Uses older 14nm process
History
The Core i5-11400T launched in March 2021 alongside the Rocket Lake-S desktop family. Intel introduced the "T" series to cater to the small form factor and low-power market segments, where AMD's APUs were gaining traction. By backporting Cypress Cove to 14nm, Intel managed to deliver PCIe 4.
0 support and improved IPC, even on their low-power variants. The 11400T specifically targeted system integrators building Mini PCs, AIOs (All-in-Ones), and HTPCs. It allowed OEMs to offer 6-core performance in ultra-compact chassis without requiring active cooling.
While the desktop market was heavily focused on high-performance K-series chips, the 11400T quietly served a niche but important audience needing reliable, low-heat computing. It marked a transitional phase for Intel, bridging the gap before the more efficient Alder Lake architecture arrived, providing a viable stopgap for power-sensitive desktop applications.
Improvements over Previous Generation
- Added PCIe 4.0 support
- Improved IPC via Cypress Cove
- Faster native memory speed (3200 MT/s)
Alternatives & Competitors
Should You Buy It?
Recommended for the right buyer
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.
Avoid if…
- Building a gaming PC
- Heavy video editing or rendering
- You need high single-core burst performance
Use Cases
Interesting Facts
The i5-11400T is designed for Small Form Factor (SFF) PCs and All-in-Ones.
Its base clock of 1.3 GHz is significantly lower than the standard 11400 to maintain the 35W TDP.
It is built on the 14nm process, unlike the 10nm Tiger Lake mobile chips.
The chip utilizes Cypress Cove cores, backported from 10nm Sunny Cove.
It supports PCIe 4.0, bringing next-gen storage speeds to low-power desktops.
The integrated UHD 730 graphics feature 24 Execution Units.
It uses the LGA 1200 socket, compatible with 400 and 500 series motherboards.
The processor is part of the Rocket Lake-S family, which marked Intel's first desktop PCIe 4.0 implementation.
It supports Intel Quick Sync Video for fast hardware video encoding and decoding.
The 11400T is often favored for HTPC builds due to its low heat output.
People Also Ask
Is the i5-11400T good for gaming?
No, its low base clock makes it unsuitable for modern gaming.
Can the i5-11400T be passively cooled?
Yes, with an adequate chassis, its 35W TDP allows for passive cooling.
What is the difference between i5-11400 and i5-11400T?
The 11400T has a lower base clock and a 35W TDP compared to the 65W 11400.
Does the i5-11400T come with a cooler?
Yes, it typically comes with a stock Intel cooler, though low-profile coolers are often used.
What architecture is the i5-11400T based on?
It is based on the Rocket Lake architecture.
Can I overclock the i5-11400T?
No, it is not unlocked for overclocking.
What is the max memory bandwidth?
The max memory bandwidth is 51.2 GB/s.
Is the i5-11400T good for a home server?
Yes, its low power consumption makes it excellent for a home server or NAS.
Does it support ECC memory?
No, it does not support ECC memory.
What is the L3 cache size?
It has 12MB of L3 cache.
Frequently Asked Questions
What is the TDP of the i5-11400T?
It has a low TDP of 35W.
What is the base clock speed of the i5-11400T?
The base clock is 1.3 GHz.
Does the i5-11400T support PCIe 4.0?
Yes, it offers 20 PCIe 4.0 lanes.
What integrated graphics does it have?
It includes Intel UHD Graphics 730.
Is the i5-11400T unlocked?
No, the multiplier is locked.
What socket does the i5-11400T use?
It uses the Intel LGA 1200 socket.
How many cores and threads does it have?
It has 6 cores and 12 threads.
What is the max turbo frequency?
It can boost up to 3.7 GHz.
When was the i5-11400T released?
It was released on March 16, 2021.
What memory type does it support?
It supports dual-channel DDR4-3200.