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AMD RX-421BD vs Apple M4 Pro (14-CPU 20-GPU)
Last updated:
Benchmarks
Performance Overview
Average performance across multiple benchmarks
Single-core performance
Multi-core performance
iGPU - FP32 Performance (Single-precision GFLOPS)
AMD RX-421BD
10 %
AMD Radeon R7 - 512 (Merlin Falcon)
Apple M4 Pro (20 Core)
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
Cinebench R23 (SC)
690 entries
690 entries
Cinebench R23 (MC)
665 entries
665 entries
Geekbench 6 (SC)
1,989 entries
1,989 entries
Geekbench 6 (MC)
1,927 entries
1,927 entries
FP32 SP (iGPU)
2,219 entries
2,219 entries
PassMark CPU-Mark
2,504 entries
2,504 entries
CPU performance per watt (efficiency)
140 entries
140 entries
AI performance (NPU)
218 entries
218 entries
Specifications
At a glance
|
Wischen
|
AMD RX-421BD | Apple M4 Pro (14-CPU 20-GPU) |
|---|---|---|
| Family | AMD R (6) | Apple M series (38) |
| CPU group | AMD RX 1st Gen. (6) | Apple M4 (7) |
| Architecture | Merlin Falcon (Excavator) | M4 |
| Technology | 28 nm | 3 nm |
| Segment | Notebook | Notebook |
| Socket | FP4 | |
| Predecessor | Apple M3 Pro (12-CPU 18-GPU) | |
| Successor | Apple M5 Pro (18-CPU 20-GPU) |
CPU Cores and Base Frequency
|
Wischen
|
AMD RX-421BD | Apple M4 Pro (14-CPU 20-GPU) |
|---|---|---|
| CPU Cores / Threads | 4 / 4 | 14 / 14 |
| Hyperthreading / SMT | ✗ | ✗ |
| Core architecture | normal | hybrid (big.LITTLE) |
| Core Cluster 1: | 4x 2.10 - 3.40 GHz |
10x Donan P-Core 1.26 - 4.51 GHz |
| Core Cluster 2: | 4x Donan E-Core 1.02 - 2.59 GHz |
|
| L2-Cache | 2.00 MB | 36.00 MB |
| L3-Cache | ||
| Overclocking | ✗ | ✗ |
Integrated graphics (iGPU)
|
Wischen
|
AMD RX-421BD | Apple M4 Pro (14-CPU 20-GPU) |
|---|---|---|
| GPU name | AMD Radeon R7 - 512 (Merlin Falcon) | Apple M4 Pro (20 Core) |
| GPU frequency | 0.80 GHz | 0.39 - 1.58 GHz |
| CUs / Shader | 8 / 512 | 320 / 2560 |
| Raytracing | ✗ | ✓ |
| Max. displays | 3 | 3 |
| Max. GPU Memory | 2 GB | 32 GB |
| Technology | 28 | 3 nm |
| Release date | 2015 | Q4/2024 |
NPU AI performance
|
Wischen
|
AMD RX-421BD | Apple M4 Pro (14-CPU 20-GPU) |
|---|---|---|
| AI hardware | Apple Neural Engine | |
| AI specifications | 16 Neural cores @ 38 TOPS | |
| NPU + CPU + iGPU |
Memory & PCIe
|
Wischen
|
AMD RX-421BD | Apple M4 Pro (14-CPU 20-GPU) |
|---|---|---|
| Memory | DDR4-2400 (38.4 GB/s) DDR3-2133 (34.2 GB/s) | LPDDR5X-8533 (273.0 GB/s) |
| Max. Memory | 64 GB | |
| Memory channels | 2 | 4 |
| ECC | Yes | No |
| PCIe | 3.0 x 12 | 5.0 |
| PCIe Bandwidth | 11.8 GB/s |
Thermal Management
|
Wischen
|
AMD RX-421BD | Apple M4 Pro (14-CPU 20-GPU) |
|---|---|---|
| TDP | 35 W | 50 W |
| TDP (PL2) | ||
| TDP up | ||
| TDP down | 12 W | |
| T. junction max. | 90 °C | 100 °C |
Technical details
|
Wischen
|
AMD RX-421BD | Apple M4 Pro (14-CPU 20-GPU) |
|---|---|---|
| Chip design | Unknown | Monolithic |
| AES-NI | ✓ | ✓ |
| Operating systems | macOS, iPadOS | |
| Instruction set | x86-64 (64 bit) | Armv9.2-A (64 bit) |
| ISA extensions | SSE4a, SSE4.1, SSE4.2, AVX, FMA3, FMA4 | Rosetta 2 x86-Emulation, AVX2, SME |
| Release date | Q4/2015 | Q4/2024 |
| Release price | ||
| Documents |
User Reviews
Your rating
Here you can rate one or both of the processors. The average rating of AMD RX-421BD is 0 stars (0 ratings), while Apple M4 Pro (14-CPU 20-GPU) has received 4.8 stars (455 ratings).
Click on the stars to rate one or both processors.
Most popular CPUs in both categories
1
Apple M5 Max (18-CPU 32-GPU)
18C / 18T · 4.61 GHz
2
Apple M5 Max (18-CPU 40-GPU)
18C / 18T · 4.61 GHz
3
Apple M2 Ultra (76-GPU)
24C / 24T · 3.50 GHz
4
Apple M1 Ultra (64-GPU)
20C / 20T · 3.20 GHz
5
Apple M1 Ultra (48-GPU)
20C / 20T · 3.20 GHz
6
Apple M4 (8-CPU)
8C / 8T · 4.46 GHz
7
Apple M2 Ultra (60-GPU)
24C / 24T · 3.50 GHz
8
Apple M4 Pro (14-CPU 20-GPU)
14C / 14T · 4.51 GHz
9
AMD RX-421BD
4C / 4T · 3.40 GHz
Popular Comparisons
4
24 C / 24 T · 5.60 GHz VS Apple M4 Pro (14-CPU 20-GPU)
14 C / 14 T · 4.51 GHz
5
20 C / 20 T · 5.30 GHz VS Apple M4 Pro (14-CPU 20-GPU)
14 C / 14 T · 4.51 GHz
