COMPARE / RTX 4090 VS RTX 5080
RTX 4090 vs RTX 5080
Specs from the chip makers' datasheets; prices from the live Compute Cafe panel, refreshed hourly. Every rate is an on-demand published price with a source receipt.
CHEAPEST RTX 4090
$0.090/hr
SpotGPUs · median $0.48 · 38 providers
CHEAPEST RTX 5080
$0.090/hr
SpotGPUs · median $6.70 · 6 providers
CHEAPER RIGHT NOW
RTX 4090
live panel, 2026-09-27
| RTX 4090 | RTX 5080 | |
|---|---|---|
| MAKER | NVIDIA | NVIDIA |
| ARCHITECTURE | Ada Lovelace | Blackwell |
| LAUNCHED | 2022 | 2025 |
| MEMORY | 24 GB GDDR6X | 16 GB GDDR7 |
| MEMORY BANDWIDTH | 1.0 TB/s | 960 GB/s |
| TENSOR COMPUTE | 330 TFLOPS FP16 tensor dense (660 sparse); FP8 supported | 56.3 TFLOPS FP32; 5th-gen tensor cores with FP8/FP4 support |
| POWER DRAW | 450 W | 360 W |
| INTERCONNECT | PCIe 4.0 x16 | PCIe 5.0 x16 |
HOW TO CHOOSE
RTX 5080 vs RTX 4090
Last generation's flagship carries 24 GB - 8 GB more than the 5080 - with comparable real-world speed. For LLM work the older card's memory often beats the newer card's architecture.
Workload fit
RTX 4090: small-model inference, fine-tuning 7b-13b, image generation. RTX 5080: small-model inference, fine-tuning, image and video generation.
RTX 4090 VS RTX 5080 - FAQ
Which is cheaper to rent, RTX 4090 or RTX 5080?
By today's published on-demand rates: RTX 4090 starts at $0.090/GPU/hr (median $0.48, 38 providers) and RTX 5080 starts at $0.090/GPU/hr (median $6.70, 6 providers). The cheapest live listing is the RTX 4090 at SpotGPUs. Figures recompute from the panel on every refresh.
RTX 4090 or RTX 5080 - which should I rent?
RTX 4090: The RTX 4090 is the consumer card that built the budget GPU-cloud market: L40S-class FP16 throughput at a fraction of the price, limited by 24 GB of memory, no ECC, and no datacenter software features. RTX 5080: The RTX 5080 is Blackwell's upper-mainstream consumer card: GDDR7 bandwidth and FP4/FP8 tensor support in a 16 GB, 360 W package. The side-by-side spec table and live price rows above give the full picture.
Where can I rent RTX 4090 and RTX 5080?
38 providers publish RTX 4090 rates and 6 publish RTX 5080 rates on Compute Cafe. Every row links to the provider's own published price - committed-use and reserved rates are excluded.
Full pricing: RTX 4090 · RTX 5080 · all comparisons