BTC
ETH
USDT
XMR
LTC
GPU comparison · Blackwell vs Ada Lovelace
NVIDIA RTX 5080 vs RTX 4090.
A newer Blackwell card against the older flagship. The RTX 4090 (Ada Lovelace) has 50% more memory (24 GB of GDDR6X against 16 GB of GDDR7), slightly more bandwidth and about 47% more dense FP8 and BF16 throughput. The RTX 5080 adds FP4 tensor cores and costs $70 less per card per month.
- 16 vs 24 GBGPU memory
- 0.96 vs 1.01 TB/smemory bandwidth
- $199 vs $269per GPU, per month
RTX 5080 vs RTX 4090: which one to rent.
Choose the RTX 5080 if
- Your model fits in 16 GB: up to about 12B parameters in FP8 or 22B in 4-bit per card by our sizing rule.
- You want to run FP4 checkpoints: the RTX 5080 has FP4 tensor cores, the Ada-generation RTX 4090 does not.
- You want the lowest price per card: $199 against $269 a month.
Choose the RTX 4090 if
- Your model needs more than 16 GB: 24 GB holds about 18B parameters in FP8, or a 32B model in 4-bit (about 21 GB).
- You want more throughput per card: about 47% more dense FP8 and BF16 tensor throughput.
- You generate images or video at high resolution or in batches, where 8 GB more memory gives headroom.
RTX 5080 vs RTX 4090 specs, side by side.
Figures from NVIDIA’s published specifications, per GPU. Tensor figures are peak dense throughput.
| Per GPU | NVIDIA RTX 5080 | NVIDIA RTX 4090 | RTX 4090 / RTX 5080 |
|---|---|---|---|
| Architecture | Blackwell | Ada Lovelace, TSMC 4N | — |
| Form factor | PCIe Gen5 graphics card | PCIe Gen4 graphics card | — |
| GPU memory | 16 GB GDDR7, 256-bit | 24 GB GDDR6X, 384-bit | 1.5× |
| Memory bandwidth | 960 GB/s | 1,008 GB/s | 1.05× |
| GPU-to-GPU link | None (PCIe Gen5) | None (PCIe Gen4) | — |
| FP4 tensor (dense) | 0.9 PFLOPS | Not supported | — |
| FP8 tensor (dense) | 225 TFLOPS | 330 TFLOPS | 1.47× |
| FP16 / BF16 tensor (dense) | 112.6 TFLOPS | 165 TFLOPS | 1.47× |
| FP64 | — | — | — |
| Max power | 360 W | 450 W | — |
| GPUs per server | 1, 2, 4 | 1, 2, 4 | — |
| Per GPU in our servers | 8 vCPU · 32 GB RAM · 0.5 TB | 12 vCPU · 64 GB RAM · 1 TB | — |
Sources: NVIDIA GeForce RTX 5080 · RTX Blackwell whitepaper · NVIDIA GeForce RTX 4090 · Ada whitepaper. Full sheets: RTX 5080 · RTX 4090
RTX 5080 vs RTX 4090 rental price.
At CryptGPU, the RTX 5080 rents for $199 and the RTX 4090 for $269 per GPU per month, 30% below the market median of public on-demand prices, paid in crypto with no KYC. Hourly figures are the monthly price divided by 730 hours.
| CryptGPU | NVIDIA RTX 5080 | NVIDIA RTX 4090 | RTX 4090 / RTX 5080 |
|---|---|---|---|
| Price per GPU, per month | $199 | $269 | 1.35× |
| Equivalent per GPU-hour | $0.27 | $0.37 | — |
| Per GB of GPU memory, per month | $12.44 | $11.21 | 0.9× |
| Per PFLOPS of dense FP8, per month | $884 | $815 | 0.92× |
| Largest server | 4× · $796/mo | 4× · $1,076/mo | — |
| Market median, per GPU | $299* | $387 | — |
| Below the median | −33% | −30% | — |
* Indicative market reference: no provider publishes an on-demand price for this GPU yet. Same price per GPU at every server size, no hourly metering. How we compare prices · Configure an RTX 5080 server · Configure a RTX 4090 server
Which models fit on each.
Smallest server that holds each model, by precision. Rule of thumb with headroom for the KV cache, 92% of GPU memory usable.
| Model (total parameters) | RTX 5080 · FP8 | RTX 4090 · FP8 | RTX 5080 · 4-bit | RTX 4090 · 4-bit |
|---|---|---|---|---|
| Qwen3.5-9B | 1× | 1× | 1× | 1× |
| Gemma 4 31B | 4× | 2× | 2× | 1× |
| Llama 3.3 70B | — | 4× | 4× | 4× |
| gpt-oss-120b | — | — | — | 4× |
| DeepSeek-V4-Flash | — | — | — | — |
| Qwen3.5-397B-A17B | — | — | — | — |
| DeepSeek-R1 (671B) | — | — | — | — |
| Kimi K2.6 (1T) | — | — | — | — |
FP8 ≈ 1.2 bytes and 4-bit ≈ 0.65 bytes per parameter. — = larger than the biggest server of that GPU. Size another model · How much VRAM does an LLM need?
RTX 5080 vs RTX 4090 FAQ.
More on each GPU: NVIDIA RTX 5080 · NVIDIA RTX 4090.
Is the RTX 5080 faster than the RTX 4090?
Not for AI on paper: the RTX 4090 has about 47% more dense FP8 and BF16 throughput, 5% more memory bandwidth and 50% more memory. The RTX 5080 has FP4 tensor cores, which the 4090 lacks, and costs less.
Which one runs larger models?
The RTX 4090: 24 GB against 16 GB per card. In a server of four cards, that is 96 GB (about 88 GB usable) against 64 GB (about 59 GB usable).
Do both come in multi-card servers?
Yes, in servers of 1, 2 or 4 cards connected over PCIe. GeForce cards have no NVLink.
Other GPU comparisons.
- Ada Lovelace vs Hopper RTX 4090 vs H100 24 vs 80 GB · 1 TB/s vs 3.35 TB/s $269 vs $1,779/mo per GPU
- Blackwell vs Ada Lovelace RTX 5090 vs RTX 4090 32 vs 24 GB · 1.8 TB/s vs 1 TB/s $329 vs $269/mo per GPU
- Ada Lovelace vs Ada Lovelace L40S vs RTX 4090 48 vs 24 GB · 864 GB/s vs 1 TB/s $789 vs $269/mo per GPU
Rent the RTX 5080 or the RTX 4090.
Dedicated servers with 1 to 4 GPUs, one monthly price, paid in crypto. Online in under 10 minutes, no KYC.