Intel Core i5 8400 vs i5 7400: performance comparison
VS
Intel Core i5 8400
Intel Core i5 7400
We compared two desktop CPUs: the 2.8 GHz Intel Core i5 8400 with 6-cores against the 3.0 GHz i5 7400 with 4-cores. On this page, you’ll find out which processor has better performance in benchmarks, games and other useful information.
- Review
- Differences
- Performance
- Specs
- Comments
Review
General overview and comparison of the processors
Single-Core Performance
Performance in single-threaded apps and benchmarks
Core i5 8400
47
Core i5 7400
42
Performance
Measure performance when all cores are involved
Core i5 8400
23
Core i5 7400
15
Power Efficiency
The efficiency score of electricity consumption
Core i5 8400
44
Core i5 7400
44
NanoReview Final Score
Generic CPU rating
Core i5 8400
37
Core i5 7400
32
Key Differences
What are the key differences between 7400 and 8400
Advantages of Intel Core i5 8400
- Supports up to 128 GB DDR4-2666 RAM
- Has 2 more physical cores
- Has 3 MB larger L3 cache size
- Around 5.
84 GB/s (16%) higher theoretical memory bandwidth
- 17% faster in a single-core Geekbench v5 test — 1034 vs 884 points
- Newer — released 9-months later
- 14% higher Turbo Boost frequency (4 GHz vs 3.5 GHz)
Benchmarks
Comparing the performance of CPUs in benchmarks
Cinebench R23 (Single-Core)
Core i5 8400
+10%
1020
Core i5 7400
926
Cinebench R23 (Multi-Core)
Core i5 8400
+72%
5811
Core i5 7400
3379
Passmark CPU (Single-Core)
Core i5 8400
+14%
2379
Core i5 7400
2079
Passmark CPU (Multi-Core)
Core i5 8400
+69%
9228
Core i5 7400
5458
Geekbench 5 (Single-Core)
Core i5 8400
+16%
1026
Core i5 7400
883
Geekbench 5 (Multi-Core)
Core i5 8400
+49%
4607
Core i5 7400
3082
▶️ Submit your Cinebench R23 result
By purchasing through links on this site, we may receive a commission from Amazon.
This does not affect our assessment methodology.
Specifications
Full technical specification of Intel Core i5 8400 and i5 7400
General
| Vendor | Intel | Intel |
| Released | October 5, 2017 | January 3, 2017 |
| Type | Desktop | Desktop |
| instruction set | x86-64 | x86-64 |
| Codename | Coffee Lake | Kaby Lake |
| Model number | i5-8400 | i5-7400 |
| Socket | LGA-1151 | LGA-1151 |
| Integrated GPU | UHD Graphics 630 | HD Graphics 630 |
Performance
| Cores | 6 | 4 |
| Threads | 6 | 4 |
| Base Frequency | 2. 8 GHz |
3.0 GHz |
| Turbo Boost Frequency | 4 GHz | 3.5 GHz |
| Bus frequency | 100 MHz | 100 MHz |
| Multiplier | 28x | 30x |
| Bus Bandwidth | 8 GT/s | 8 GT/s |
| L1 Cache | 64K (per core) | 64K (per core) |
| L2 Cache | 256K (per core) | 256K (per core) |
| L3 Cache | 9MB (shared) | 6MB (shared) |
| Unlocked Multiplier | No | No |
| Fabrication process | 14 nm | 14 nm |
| TDP | 65 W | 65 W |
| Max. temperature | 100°C | 100°C |
| Integrated Graphics | Intel UHD Graphics 630 | Intel HD Graphics 630 |
| GPU Base Clock | 350 MHz | 350 MHz |
| GPU Boost Clock | 1050 MHz | 1000 MHz |
| Shading Units | 192 | 192 |
| TMUs | 24 | 24 |
| ROPs | 3 | 3 |
| Execution Units | 24 | 24 |
| TGP | 15 W | 15 W |
Max. Resolution |
4096×2304 — 60 Hz | 4096×2304 — 60 Hz |
iGPU FLOPS
Core i5 8400
0.38 TFLOPS
Core i5 7400
0.44 TFLOPS
Memory support
| Memory types | DDR4-2666 | DDR4-2400, DDR3L-1600 |
| Memory Size | 128 GB | 64 GB |
| Max. Memory Channels | 2 | 2 |
| Max. Memory Bandwidth | 41.6 GB/s | 35.76 GB/s |
| ECC Support | No | No |
| Official site | Intel Core i5 8400 official page | Intel Core i5 7400 official page |
| PCI Express Version | 3.0 | 3.0 |
| PCI Express Lanes | 16 | 16 |
| Extended instructions | SSE4. 1, SSE4.2, AVX-2 |
SSE4.1, SSE4.2, AVX-2 |
Cast your vote
Choose between two processors
Core i5 8400
21 (80.8%)
Core i5 7400
5 (19.2%)
Total votes: 26
ompetitors
1.
Intel Core i5 8400 and Intel Core i5 12600K
2.
Intel Core i5 8400 and Intel Core i5 12400
3.
Intel Core i5 8400 and Intel Core i5 12400F
4.
Intel Core i5 7400 and Intel Core i5 12400
So which CPU will you choose: Intel Core i5 7400 or i5 8400?
Name
Message
Promotion
i5-7400 vs i5-8400 — Red Dead Redemption 2 with GTX 1660 Benchmarks 1080p, 1440p, Ultrawide, 4K Comparison
GTX 1660 with
Intel Core i5-7400 @ 3.
00GHz
Red Dead Redemption 2
GTX 1660 with
Intel Core i5-8400 @ 2.80GHz
i5-7400
i5-8400
Multi-Thread Performance
7352 Pts
11694 Pts
Single-Thread Performance
1952 Pts
2334 Pts
Red Dead Redemption 2
i5-7400 vs i5-8400 in Red Dead Redemption 2 using GTX 1660 — CPU Performance comparison at Ultra, High, Medium, and Low Quality Settings with 1080p, 1440p, Ultrawide, 4K resolutions
i5-7400
i5-8400
Ultra Quality
| Resolution | Frames Per Second |
|---|---|
| 1080p |
33.8 FPS |
| 1080p |
39.3 FPS |
| 1440p |
27.6 FPS |
| 1440p |
32.1 FPS |
| 2160p |
17.5 FPS |
| 2160p |
20.4 FPS |
| w1440p |
24.1 FPS |
| w1440p |
28. |
1 FPSHigh Quality
| Resolution | Frames Per Second |
|---|---|
| 1080p |
62.4 FPS |
| 1080p |
71.1 FPS |
| 1440p |
52.4 FPS |
| 1440p |
59.7 FPS |
| 2160p |
35.2 FPS |
| 2160p |
40.3 FPS |
| w1440p |
46.5 FPS |
| w1440p |
53.2 FPS |
Medium Quality
| Resolution | Frames Per Second |
|---|---|
| 1080p |
91.0 FPS |
| 1080p |
102.9 FPS |
| 1440p |
77.1 FPS |
| 1440p |
87.3 FPS |
| 2160p |
52.9 FPS |
| 2160p |
60.1 FPS |
| w1440p |
69. |
| w1440p |
78.3 FPS |
0 FPSLow Quality
| Resolution | Frames Per Second |
|---|---|
| 1080p |
148.3 FPS |
| 1080p |
166.5 FPS |
| 1440p |
126.7 FPS |
| 1440p |
142.5 FPS |
| 2160p |
88.3 FPS |
| 2160p |
99.8 FPS |
| w1440p |
113.9 FPS |
| w1440p |
128.5 FPS |
i5-7400
- For some games, a cpu with a higher clock speed, or in a technical name IPC (Instructions per clock), has better results than other CPU’s with higher core count and lower core speed.
i5-8400
- The i5-8400 has higher Level 3 Cache. This is useful when you have substantial multiprocessing workloads, many computationally intense simultaneous processes.
More likely on a server, less on a personally used computer for interactive desktop workloads. - The i5-8400 has more cores. The benefit of having more cores is that the system can handle more threads. Each core can handle a separate stream of data. This architecture greatly increases the performance of a system that is running concurrent applications.
- The i5-8400 has more threads. Larger programs are divided into threads (small sections) so that the processor can execute them simultaneously to get faster execution.
- The i5-8400 has a higher turbo clock boost. Turbo Boost is a CPU feature that will run CPU clock speed faster than its base clock, if certain conditions are present. It will enable older software that runs on fewer cores, to perform better on newer hardware. Since games are software too, it is also applicable to them.
Compare i5-7400 vs i5-8400 specifications
i5-7400 vs i5-8400 Architecture
| i5-7400 | i5-8400 | |
|---|---|---|
| Codename | Kaby Lake | Coffee Lake |
| Generation | Core i5 (Kaby Lake) |
Core i5 (Coffee Lake) |
| Market | Desktop | Desktop |
| Memory Support | DDR4 | DDR4 |
| Part# | SR32W | SLAPL |
| Production Status | Active | Active |
| Released | Jan 2017 | Oct 2017 |
i5-7400 vs i5-8400 Cache
| i5-7400 | i5-8400 | |
|---|---|---|
| Cache L1 | 64K (per core) | 64K (per core) |
| Cache L2 | 256K (per core) | 256K (per core) |
| Cache L3 | 6MB (shared) | 9MB (shared) |
i5-7400 vs i5-8400 Cores
| i5-7400 | i5-8400 | |
|---|---|---|
| # of Cores | 4 | 6 |
| # of Threads | 4 | 6 |
| Integrated Graphics | HD 630 | N/A |
| SMP # CPUs | 1 | 1 |
i5-7400 vs i5-8400 Features
| i5-7400 | i5-8400 | |
|---|---|---|
| MMX SSE SSE2 SSE3 SSSE3 SSE4. 
|