NVIDIA Rubin GPU vs NVIDIA H800 SXM5
GPU Specs Compare
Graphics Card
Release Date
Jan 2026
Mar 2023
Generation
Server Rubin
Server Hopper
Type
Desktop
AI GPU
Bus Interface
PCIe 6.0 x16
PCIe 5.0 x16
Clock Speeds
Base Clock
700 MHz
1095 MHz
Boost Clock
2267 MHz
1755 MHz
Memory Clock
2695 MHz
1313 MHz
Memory
Memory Size
288GB
80GB
Memory Type
HBM4
HBM3
Memory Bus
16384bit
5120bit
Bandwidth
22.1TB/s
3.36TB/s
Render Config
SM Count
224
132
Shading Units
28672
16896
TMUs
896
528
ROPs
24
24
Tensor Cores
896
528
L1 Cache
256 KB (per SM)
256 KB (per SM)
L2 Cache
128 MB
50 MB
Theoretical Performance
Pixel Rate
54.41 GPixel/s
42.12 GPixel/s
Texture Rate
2031.2 GTexel/s
926.6 GTexel/s
FP16 (half)
260.0 TFLOPS
237.2 TFLOPS
FP32 (float)
130.0 TFLOPS
59.30 TFLOPS
FP64 (double)
32.50 TFLOPS
29.65 TFLOPS
Graphics Processor
GPU Name
GR100
GH100
Architecture
Rubin
Hopper
Foundry
TSMC
TSMC
Process Size
3 nm
5 nm
Transistors
336 billion
80 billion
Die Size
1456 mm²
814 mm²
Board Design
TDP
2300W
700W
Suggested PSU
2700 W
1100 W
Outputs
No outputs
No outputs
Power Connectors
-
8-pin EPS
Graphics Features
DirectX
N/A
N/A
OpenGL
N/A
N/A
OpenCL
3.0
3.0
Vulkan
N/A
N/A
CUDA
10.7
9.0
Shader Model
N/A
N/A