RTX 3090 vs RTX 4090
Datasheet specs side by side, plus what each card actually costs to rent today across every provider we track.
RTX 3090
RTX 4090
Spec sheet
| RTX 3090 | RTX 4090 | |
|---|---|---|
| Architecture | Ampere | Ada Lovelace |
| VRAM (max variant) | 24 GB | 24 GB |
| FP16 TFLOPS (dense) | 142 | 165 |
| Memory bandwidth | 936 GB/s | 1008 GB/s |
| TDP | 350 W | 450 W |
| Interconnect | PCIe Gen4 | PCIe Gen4 |
| Launched | 2020 | 2022 |
Computed price-performance at today's cheapest on-demand rates: RTX 3090 $1.41 per PFLOP-hour vs RTX 4090 $2.12. Formula: cheapest $/hr ÷ dense FP16 PFLOPS (1 PFLOP = 1000 TFLOPS). Specs from vendor datasheets (source, source).
What they cost to rent (2026-08-22)
| RTX 3090 | RTX 4090 | |
|---|---|---|
| Cheapest on-demand $/hr | $0.20 | $0.35 |
| Cheapest spot/community $/hr | $0.09 | $0.16 |
| Cheapest source | TensorDock | TensorDock |
| Providers offering it | 3 | 4 |
Cheapest verified on-demand rate per side from today's snapshot; highlighted = cheaper. Spot/marketplace tiers shown on the individual pages.
FAQ
RTX 3090 is cheaper: the RTX 3090 rents from $0.20 per GPU-hour and the RTX 4090 from $0.35 on-demand, verified 2026-08-22.
The RTX 3090 has 24 GB and the RTX 4090 has 24 GB. They match on maximum VRAM.
Prices render from the live dataset each build. More: the screener · price movers · methodology.