NVIDIA B300 vs AMD Steam Machine GPU
GPU Specs Compare
Graphics Card
Release Date
Sep 2025
Jan 2026
Generation
Server Blackwell
Console GPU
Type
Desktop
Desktop
Bus Interface
PCIe 5.0 x16
-
Clock Speeds
Base Clock
1665 MHz
1720 MHz
Boost Clock
2032 MHz
2450 MHz
Memory Clock
2000 MHz
2250 MHz
Memory
Memory Size
144GB
8GB
Memory Type
HBM3e
GDDR6
Memory Bus
4096bit
128bit
Bandwidth
4.10TB/s
288.0GB/s
Render Config
SM Count
148
-
Shading Units
18944
1792
TMUs
592
112
ROPs
24
64
Tensor Cores
592
-
L1 Cache
256 KB (per SM)
128 KB per Array
L2 Cache
50 MB
2 MB
Compute Units
-
28
RT Cores
-
28
L3 Cache
-
32 MB
Theoretical Performance
Pixel Rate
48.77 GPixel/s
156.8 GPixel/s
Texture Rate
1202.9 GTexel/s
274.4 GTexel/s
FP16 (half)
1231.8 TFLOPS
35.12 TFLOPS
FP32 (float)
76.99 TFLOPS
17.56 TFLOPS
FP64 (double)
1202.9 GFLOPS
548.8 GFLOPS
Graphics Processor
GPU Name
GB110
Navi 33
Architecture
Blackwell Ultra
RDNA 3.0
Foundry
TSMC
TSMC
Process Size
5 nm
6 nm
Transistors
104 billion
13.3 billion
Die Size
Unknown
204 mm²
Board Design
TDP
1400W
110W
Suggested PSU
1800 W
-
Outputs
No outputs
No outputs
Power Connectors
-
None
Graphics Features
DirectX
N/A
12 Ultimate (12_2)
OpenGL
N/A
4.6
OpenCL
3.0
2.2
Vulkan
N/A
1.4
CUDA
10.3
-
Shader Model
N/A
6.8