8th Gen Intel Core i5 8400
- iGPU:
- Intel UHD Graphics 630
- Boost/Base Clock:
- 4.0 GHz / 2.8 GHz
- Core/Thread Count:
- 6C/6T
- Cache:
- 9MB L3 + 1.5MB L2 + 384KB L1
- TDP:
- 65W
- CPU Process Node:
- 14 Nanometers
- CPU Socket:
- FCLGA1151
- CPU Series:
- Coffee Lake, 8th Gen Intel Core
- Memory Support:
- DDR4-2666
- Form Factor:
- Desktop
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Manufacturer: Intel Last updated: September 9, 2026
8th Gen Intel Core i5 8400 Review
The 8th Gen Intel Core i5 8400 is a 6-core desktop processor built on Coffee Lake, running a 2.8 GHz base clock that boosts to 4.0 GHz within an efficient 65 Watt TDP on the LGA 1151 socket.
This chip's jump to 6 physical cores from the previous generation's 4-core i5 lineup made it a genuine mainstream gaming value standout at launch, delivering strong multi-core capability without hyperthreading at an accessible price.
Intel UHD Graphics 630
A basic integrated GPU intended for display output; mainstream desktop builds around this chip typically pair it with a discrete GPU for gaming.
How Is the Core i5 8400 in Terms of Performance
The jump to 6 physical cores gave this chip a genuine generational leap over the previous 4-core i5 lineup, delivering strong gaming and everyday performance at a mainstream price point that made it a popular budget gaming CPU choice.
Benchmarks
The benchmarks below are published results for specific applications. They are measured separately and do not feed the two scores above.
Puget Bench for Photoshop v1.0 - points (More is Better)
- Apple M5 Max15043.83 points
- Apple M5 Pro14885.21 points
- Apple M512095.89 points
- AMD Ryzen 7 9800X3D12088.31 points
- Intel Core i9-14900KF10029.96 points
- 11th Gen Intel Core i7 11700K7098.88 points
- 10th Gen Intel Core i9-10900KF6892.97 points
- 8th Gen Intel Core i5 8400 (this product)4325 points
Puget Systems runs a fixed set of real Photoshop jobs: opening and saving large files, resizing, content-aware fill, blurs and filters. A higher score means less waiting on the tasks a retoucher repeats all day.
Photoshop is decided mostly by how fast a few cores are, not how many there are, so a chip with fewer but faster cores often beats one with more cores. Treat a gap under about 5 percent as something you would never notice while working.
Puget Bench for Premiere Pro v1.0-1.1 - points (More is Better)
- 10th Gen Intel Core i9-10900KF8213.67 points
- 11th Gen Intel Core i7 11700K8123.47 points
- 10th Gen Intel Core i9 10920X8063.5 points
- 10th Gen Intel Core i9 10900K7881.73 points
- 10th Gen Intel Core i9-10980XE7835.06 points
- 10th Gen Intel Core i9 10850K7227.4 points
- 9th Gen Intel Core i9-9900KS7211.33 points
- 8th Gen Intel Core i5 8400 (this product)4393.33 points
Plays back and exports 4K and 8K timelines across several camera codecs, with effects and multi-stream sequences, in Adobe Premiere Pro.
Export time rewards more cores, but much of the timeline work runs on the hardware decoder and the graphics card instead of the processor. A small gap here rarely changes how the edit feels.
Puget Bench for After Effects v1.0-1.1 - points (More is Better)
- Intel Core i9-14900KF13588.09 points
- AMD Ryzen 7 9800X3D12906.24 points
- Apple M5 Max11280.89 points
- Apple M5 Pro9928.85 points
- Apple M57261.63 points
- 9th Gen Intel Core i9-9900K6945.81 points
- 10th Gen Intel Core i9 10900K6799.67 points
- 8th Gen Intel Core i5 8400 (this product)5086.67 points
RAM preview and rendering of 2D and 3D compositions in After Effects, including camera tracking.
After Effects still runs largely on one core at a time, so per-core speed decides this and extra cores add very little. This is the benchmark where a high-clock chip pulls ahead of a many-core one.
Benchmarks
As a 6-core Coffee Lake chip sharing its core architecture with the i5-8500 and i5-8600K, this processor's real-world gaming and productivity performance sits solidly at the mainstream tier for its generation, trading the higher-clocked K-series' overclocking headroom for a lower, more efficient stock TDP.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Budget-conscious gaming desktop builds wanting genuine 6-core performance without overclocking
Not for
- Enthusiasts wanting to overclock, the unlocked i5-8600K offers that flexibility
Specifications
What these specs meanIdentity
| Brand | Intel |
|---|---|
| Product Line | Core i5 |
| Model Number | 8400 |
| Codename | Coffee Lake |
| Release Year | 2017 |
Segment and platform
| Market Segment | Desktop |
|---|---|
| Microarchitecture | Coffee Lake |
| Socket | FCLGA1151 |
| Socket Status | End of Life |
| Process Node | 14 nm |
Core configuration
| Total Cores | 6 |
|---|---|
| Performance Cores | 6 |
| Efficiency Cores | 0 |
| Total Threads | 6 |
| SMT Enabled | No |
Clock speeds
| P-Core Base Clock | 2.8 GHz |
|---|---|
| P-Core Boost Clock | 4.0 GHz |
Cache
| L2 Cache | 1.5 MB |
|---|---|
| L3 Cache | 9 MB |
Power and thermal
| Base Power | 65 W |
|---|---|
| Max Turbo Power | 65 W |
Memory
| Memory Type | DDR4-2666 |
|---|---|
| Max Memory Speed | 2666 MT/s |
| Memory Channels | 2 |
| ECC Support | No |
Graphics and AI
| Integrated Graphics | Yes |
|---|---|
| iGPU Model | Intel UHD Graphics 630 |
| Copilot Plus Certified | No |
Expansion
| PCIe Generation | 3.0 |
|---|---|
| PCIe Lanes | 16 |
Commercial
| Launch MSRP | 182 USD |
|---|---|
| Retail Availability | Retail |
| Form Factor | Desktop |
|---|---|
| TDP | 65 W |
| iGPU | Intel UHD Graphics 630 |
FAQs
What are the key specifications of the 8th Gen Intel Core i5 8400?
The 8th Gen Intel Core i5 8400 has 6 cores and 6 threads, a 2.8 GHz base and 4.0 GHz boost clock, 9 MB of L3 cache and a 65 W TDP. Integrated graphics: Intel UHD Graphics 630. Socket: FCLGA1151.
Will the 8th Gen Intel Core i5 8400 work with my current setup?
The 8th Gen Intel Core i5 8400 lists CPU Socket is LGA 1151. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the 8th Gen Intel Core i5 8400 best suited to?
Best suited to: Budget-conscious gaming desktop builds wanting genuine 6-core performance without overclocking.
What are the drawbacks of the 8th Gen Intel Core i5 8400?
Not the best fit for: Enthusiasts wanting to overclock, the unlocked i5-8600K offers that flexibility.
Compare and read more
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