NVIDIA RTX PRO 4000 Blackwell SFF vs AMD Radeon Sky 900
GPU · Specs Compare
Graphics Card
Release Date
Aug 2025
Mar 2013
Generation
Blackwell PRO W
Radeon Sky
Type
Desktop
Desktop
Bus Interface
PCIe 5.0 x8
PCIe 3.0 x16
Clock Speeds
Base Clock
577 MHz
825 MHz
Boost Clock
1432 MHz
950 MHz
Memory Clock
1125 MHz
1250 MHz
Memory
Memory Size
24GB
3GB
Memory Type
GDDR7
GDDR5
Memory Bus
192bit
384bit
Bandwidth
432.0GB/s
240.0GB/s
Render Config
SM Count
70
—
Shading Units
8960
1792
TMUs
280
112
ROPs
96
32
Tensor Cores
280
—
RT Cores
70
—
L1 Cache
128 KB (per SM)
16 KB (per CU)
L2 Cache
48 MB
768 KB
Compute Units
—
28
Theoretical Performance
Pixel Rate
137.5 GPixel/s
30.40 GPixel/s
Texture Rate
401.0 GTexel/s
106.4 GTexel/s
FP16 (half)
25.66 TFLOPS
—
FP32 (float)
25.66 TFLOPS
3.405 TFLOPS
FP64 (double)
401.0 GFLOPS
851.2 GFLOPS
Graphics Processor
GPU Name
GB203
Tahiti
Architecture
Blackwell 2.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
5 nm
28 nm
Transistors
45.6 billion
4.313 billion
Die Size
378 mm²
352 mm²
GPU Variant
—
Orthrus
Board Design
TDP
70W
300W
Suggested PSU
250 W
700 W
Outputs
4x mini-DisplayPort 2.1b
1x DVI1x mini-DisplayPort 1.2
Power Connectors
None
2x 8-pin
Graphics Features
DirectX
12 Ultimate (12_2)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
3.0
1.2
Vulkan
1.4
1.2
CUDA
12.0
—
Shader Model
6.8
5.1
▲ Specs Compare
Data sourced from official specifications and benchmark tests.