Flopper.io GPU Comparison Sheet
October 9, 2026
flopper.io/compare/nvidia-rubin-cpx-vs-nvidia-rubin-sxmNVIDIA Rubin CPX vs NVIDIA Rubin SXM
Side by side datacenter GPU specifications from the Flopper.io database.
Overview
| NVIDIA Rubin CPX | NVIDIA Rubin SXM | |
|---|---|---|
| FP32 TFLOPS | — | 130.0 |
| Memory | 128 GB | 288 GB |
| Memory Bandwidth | — | 22.0 TB/s |
| TDP | — | — |
Performance by Precision
| Precision | NVIDIA Rubin CPX peak TFLOPS (dense) | NVIDIA Rubin SXM peak TFLOPS (dense) |
|---|---|---|
| FP64 | — | 33.0 |
| FP64_TC Tensor Core | — | 200.0 |
| FP32 | — | 130.0 |
| FP32_TC Tensor Core | — | 400.0 |
| TF32 | — | 2000.0 |
| BF16 | — | 4000.0 |
| FP16 | — | 4000.0 |
| FP8 | — | 17500.0 |
| FP6 | — | 17500.0 |
| FP4 | — | — |
| NVFP4 | — | 35000.0 |
| INT8 | — | 250.0 |
Specifications
| NVIDIA Rubin CPX | NVIDIA Rubin SXM | |
|---|---|---|
| Architecture | Rubin | Rubin |
| Process Node | — | — |
| Launch Year | 2026 | 2026 |
| Form Factor | — | SXM |
| Memory Type | GDDR7 | HBM4 |
| Interface Width | — | — |
| Interconnect | — | NVLink |
| TDP | — | — |
| FP32 Efficiency | — | — |