Flopper.io GPU Comparison Sheet
September 1, 2026
flopper.io/compare/nvidia-rubin-sxm-vs-nvidia-rubin-cpxNVIDIA Rubin SXM vs NVIDIA Rubin CPX
Side by side datacenter GPU specifications from the Flopper.io database.
Overview
| NVIDIA Rubin SXM | NVIDIA Rubin CPX | |
|---|---|---|
| FP32 TFLOPS | 130.0 | — |
| VRAM | 288 GB | 128 GB |
| Memory Bandwidth | 22.0 TB/s | — |
| TDP | — | — |
Performance by Precision
| Precision | NVIDIA Rubin SXM peak TFLOPS (dense) | NVIDIA Rubin CPX peak TFLOPS (dense) |
|---|---|---|
| INT8 | 250.0 | — |
| FP8 | 17500.0 | — |
| FP16 | 4000.0 | — |
| BF16 | 4000.0 | — |
| TF32 | 2000.0 | — |
| FP32 | 130.0 | — |
| FP64_TC Tensor Core | 200.0 | — |
| FP64 | 33.0 | — |
| FP32_TC Tensor Core | 400.0 | — |
| FP6 | 17500.0 | — |
| NVFP4 | 35000.0 | — |
Specifications
| NVIDIA Rubin SXM | NVIDIA Rubin CPX | |
|---|---|---|
| Architecture | Rubin | Rubin |
| Process Node | — | — |
| Launch Year | 2026 | 2026 |
| Form Factor | SXM | — |
| Memory Type | HBM4 | GDDR7 |
| Interface Width | — | — |
| Interconnect | NVLink | — |
| TDP | — | — |
| FP32 Efficiency | — | — |