Radeon RX 6400 vs RTX PRO 4000 Blackwell
We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 24GB VRAM RTX PRO 4000 Blackwell to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6400 's Advantages
Lower TDP (53W vs 140W)
RTX PRO 4000 Blackwell 's Advantages
Released 3 years and 2 months late
Boost Clock has increased by 13% (2617MHz vs 2321MHz)
More VRAM (24GB vs 4GB)
Larger VRAM bandwidth (672.0GB/s vs 128.0GB/s)
8192 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon RX 6400
3565
RTX PRO 4000 Blackwell
+1215%
46900
Graphics Card
Jan 2022
Release Date
Mar 2025
Navi II
Generation
Blackwell PRO W
Desktop
Type
Desktop
PCIe 4.0 x4
Bus Interface
PCIe 5.0 x16
Clock Speeds
1923 MHz
Base Clock
1590 MHz
2321 MHz
Boost Clock
2617 MHz
2000 MHz
Memory Clock
1750 MHz
Memory
4GB
Memory Size
24GB
GDDR6
Memory Type
GDDR7
64bit
Memory Bus
192bit
128.0GB/s
Bandwidth
672.0GB/s
Render Config
12
Compute Units
-
-
SM Count
70
768
Shading Units
8960
48
TMUs
280
32
ROPs
96
-
Tensor Cores
280
12
RT Cores
70
128 KB per Array
L1 Cache
128 KB (per SM)
1024 KB
L2 Cache
48 MB
16 MB
L3 Cache
-
Theoretical Performance
74.27 GPixel/s
Pixel Rate
251.2 GPixel/s
111.4 GTexel/s
Texture Rate
732.8 GTexel/s
7.130 TFLOPS
FP16 (half)
46.90 TFLOPS
3.565 TFLOPS
FP32 (float)
46.90 TFLOPS
222.8 GFLOPS
FP64 (double)
732.8 GFLOPS
Board Design
53W
TDP
140W
250 W
Suggested PSU
300 W
1x HDMI 2.1
1x DisplayPort 1.4a
Outputs
4x DisplayPort 2.1b
None
Power Connectors
1x 16-pin
Graphics Processor
Navi 24
GPU Name
GB203
Navi 24 XL
(215-135000046)
GPU Variant
-
RDNA 2.0
Architecture
Blackwell 2.0
TSMC
Foundry
TSMC
6 nm
Process Size
5 nm
5.4 billion
Transistors
45.6 billion
107 mm²
Die Size
378 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 Ultimate (12_2)
4.6
OpenGL
4.6
2.2
OpenCL
3.0
1.3
Vulkan
1.4
-
CUDA
10.1
6.7
Shader Model
6.8
