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Intel Core i5-8400 vs MediaTek MT8121
Last updated:
Benchmarks
Performance Overview
Average performance across multiple benchmarks
Single-core performance
Multi-core performance
Geekbench 5, 64bit Single-Core
Single-core performance
Intel Core i5-8400
100 %
6C / 6T · 4.00 GHz
MediaTek MT8121
7 %
4C / 4T · 1.30 GHz
Geekbench 5, 64bit Multi-Core
Multi-core performance
Intel Core i5-8400
100 %
6C / 6T · 3.80 GHz
MediaTek MT8121
5 %
4C / 4T · 1.30 GHz
iGPU - FP32 Performance (Single-precision GFLOPS)
Intel Core i5-8400
100 %
Intel UHD Graphics 630
MediaTek MT8121
1 %
PowerVR SGX544
More benchmarks
Cinebench 2026 (ST)
218 entries
218 entries
Cinebench 2026 (MC)
219 entries
219 entries
Cinebench 2024 (SC)
427 entries
427 entries
Cinebench 2024 (MC)
422 entries
422 entries
Geekbench 6 (SC)
1,989 entries
1,989 entries
Geekbench 6 (MC)
1,927 entries
1,927 entries
Cinebench R20 (SC)
666 entries
666 entries
Geekbench 5 (SC)
2,512 entries
2,512 entries
Cinebench R20 (MC)
615 entries
615 entries
Geekbench 5 (MC)
2,483 entries
2,483 entries
FP32 SP (iGPU)
2,219 entries
2,219 entries
3DMark Timespy (iGPU)
534 entries
534 entries
Blender 3.1 Benchmark
213 entries
213 entries
PassMark CPU-Mark
2,504 entries
2,504 entries
Blender 2.81 (bmw27)
190 entries
190 entries
CPU-Z Benchmark 17 (SC)
250 entries
250 entries
CPU-Z Benchmark 17 (MC)
751 entries
751 entries
V-Ray CPU-Render
251 entries
251 entries
Cinebench R15 (SC)
1,113 entries
1,113 entries
Cinebench R15 (MC)
1,110 entries
1,110 entries
Geekbench 3 (SC)
945 entries
945 entries
Geekbench 3 (MC)
941 entries
941 entries
Cinebench R11.5 (SC)
826 entries
826 entries
Cinebench R11.5 (MC)
837 entries
837 entries
Cinebench R11.5 iGPU
383 entries
383 entries
Specifications
At a glance
|
Wischen
|
Intel Core i5-8400 | MediaTek MT8121 |
|---|---|---|
| Family | Intel Core i5 (336) | Mediatek MT-Serie (72) |
| CPU group | Intel Core i 8000 (20) | MediaTek MT81xx A7 (5) |
| Architecture | Coffee Lake S | Cortex-A7 |
| Technology | 14 nm | 28 nm |
| Segment | Desktop | Smartphone / Tablet |
| Socket | LGA 1151-2 | |
| Predecessor | Intel Core i5-7400 | |
| Successor | Intel Core i5-9400 |
CPU Cores and Base Frequency
|
Wischen
|
Intel Core i5-8400 | MediaTek MT8121 |
|---|---|---|
| CPU Cores / Threads | 6 / 6 | 4 / 4 |
| Hyperthreading / SMT | ✗ | ✗ |
| Core architecture | normal | normal |
| Cores: | 6x | 4x Cortex-A7 |
| Frequency: | 2.80 GHz | 1.30 GHz |
| Turbo (1 Core): | 4.00 GHz | |
| Turbo (All Cores): | 3.80 GHz | |
| L2-Cache | ||
| L3-Cache | 9.00 MB | |
| Overclocking | ✗ | ✗ |
Integrated graphics (iGPU)
|
Wischen
|
Intel Core i5-8400 | MediaTek MT8121 |
|---|---|---|
| GPU name | Intel UHD Graphics 630 | PowerVR SGX544 |
| GPU frequency | 0.35 - 1.15 GHz | 0.16 - 0.16 GHz |
| CUs / Shader | 24 / 192 | 2 / 4 |
| Raytracing | ✗ | ✗ |
| Max. displays | 3 | 1 |
| Max. GPU Memory | 64 GB | |
| Technology | 14 nm | 45nm |
| Release date | Q4/2017 | Q1/2010 |
NPU AI performance
|
Wischen
|
Intel Core i5-8400 | MediaTek MT8121 |
|---|---|---|
| AI hardware | ||
| AI specifications | ||
| NPU + CPU + iGPU |
Memory & PCIe
|
Wischen
|
Intel Core i5-8400 | MediaTek MT8121 |
|---|---|---|
| Memory | DDR4-2666 (42.7 GB/s) | |
| Max. Memory | 128 GB | |
| Memory channels | 2 | 0 |
| ECC | No | No |
| PCIe | 3.0 x 16 | |
| PCIe Bandwidth | 15.8 GB/s |
Thermal Management
|
Wischen
|
Intel Core i5-8400 | MediaTek MT8121 |
|---|---|---|
| TDP | 65 W | |
| TDP (PL2) | ||
| TDP up | ||
| TDP down | ||
| T. junction max. |
Technical details
|
Wischen
|
Intel Core i5-8400 | MediaTek MT8121 |
|---|---|---|
| Chip design | Monolithic | Chiplet |
| AES-NI | ✓ | ✗ |
| Operating systems | Windows 10, Windows 11, Linux | Android |
| Instruction set | x86-64 (64 bit) | Armv7-A (32 bit) |
| ISA extensions | SSE4.1, SSE4.2, AVX2 | |
| Release date | Q4/2017 | Q4/2013 |
| Release price | 260 $ | |
| Documents | Technical data sheet |
User Reviews
Your rating
Here you can rate one or both of the processors. The average rating of Intel Core i5-8400 is 4.1 stars (74 ratings), while MediaTek MT8121 has received 5.0 stars (1 ratings).
Click on the stars to rate one or both processors.
Most popular CPUs in both categories
1
MediaTek MT8121
4C / 4T · 0.00 GHz
2
Apple M3 Ultra (28-CPU 60-GPU)
28C / 28T · 4.06 GHz
3
Apple M3 Ultra (32-CPU 80-GPU)
32C / 32T · 4.06 GHz
4
Intel Celeron 450
1C / 1T · 0.00 GHz
5
Intel Core i5-13600KF
14C / 20T · 5.10 GHz
6
AMD Ryzen 7 5800XT
8C / 16T · 4.80 GHz
7
Intel Xeon E5-2680 v4
14C / 28T · 3.30 GHz
8
AMD Ryzen 7 5700X
8C / 16T · 4.60 GHz
9
Intel Core i5-8400
6C / 6T · 4.00 GHz
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