RTX 4000 SFF Ada vs RTX A4500: Specs, VRAM & Price
Short answer: choose the RTX 4000 SFF Ada when your workload uses FP8 quantized inference or serving. Choose the RTX A4500 when your workload is BF16/FP32-only and FP8 buys you nothing.
Both the RTX 4000 SFF Ada and the RTX A4500 ship with 20 GB of VRAM.
You can rent both by the hour, no purchase required. RTX 4000 SFF Ada from $0.198/GPU/hr; RTX A4500 from $0.209/GPU/hr. The RTX 4000 SFF Ada is 5% cheaper at the entry rate.
RTX 4000 SFF Ada
Good for inference and light fine-tuning workloads
RTX A4500
Good for inference and small-scale training workloads
Last updated: 2026-10-10 22:02:49 UTCRefreshes hourly
Specs side by side
| Spec | RTX 4000 SFF Ada | RTX A4500 |
|---|---|---|
| VRAM | 20 GB | 20 GB |
| Architecture | Ada Lovelace | Ampere |
| Compute capability | 8.9 | – |
| Precisions in hardware | FP32, FP16, BF16, FP8, INT4 | FP32, FP16, BF16, INT4 |
| Regions | 1 | 1 |
On-demand price
| Rate | RTX 4000 SFF Ada | RTX A4500 |
|---|---|---|
| Lowest per GPU/hr | $0.198/GPU/hr (cheapest overall) | $0.275/GPU/hr |
Which is better for AI: RTX 4000 SFF Ada or RTX A4500?
Choose the RTX 4000 SFF Ada when your workload uses FP8 quantized inference or serving. Choose the RTX A4500 when your workload is BF16/FP32-only and FP8 buys you nothing.
RTX 4000 SFF Ada vs RTX A4500: common questions
Is the RTX 4000 SFF Ada or the RTX A4500 better for AI?
Short answer: choose the RTX 4000 SFF Ada when your workload uses FP8 quantized inference or serving. Choose the RTX A4500 when your workload is BF16/FP32-only and FP8 buys you nothing.
Is the RTX 4000 SFF Ada or the RTX A4500 cheaper to rent?
On Aquanode's live marketplace the RTX 4000 SFF Ada starts at $0.198/GPU/hr (median $0.198/GPU/hr) and the RTX A4500 starts at $0.209/GPU/hr (median $0.242/GPU/hr). The RTX 4000 SFF Ada is the cheaper of the two at the entry rate, by 5%.
What is the difference between the RTX 4000 SFF Ada and the RTX A4500?
Both cards report 20 GB of VRAM; the RTX 4000 SFF Ada is an Ada Lovelace part and the RTX A4500 is Ampere; only the RTX 4000 SFF Ada supports FP8 compute. On price, the RTX 4000 SFF Ada lists from $0.198/GPU/hr and the RTX A4500 from $0.209/GPU/hr.
How widely available are the RTX 4000 SFF Ada and the RTX A4500?
The RTX 4000 SFF Ada is listed in 1 region and the RTX A4500 in 1 region right now.
How much does 1,000 GPU-hours cost on the RTX 4000 SFF Ada vs the RTX A4500?
At the lowest rates listed today, 1,000 GPU-hours costs $198 on the RTX 4000 SFF Ada and $209 on the RTX A4500, a difference of $11 for the same runtime. Rates are per GPU per hour and update hourly.
How much VRAM does the RTX 4000 SFF Ada have compared to the RTX A4500?
Both the RTX 4000 SFF Ada and the RTX A4500 ship with 20 GB of VRAM.
How this comparison is calculated
Every price is normalized to a per-GPU hourly rate using the same pipeline as every other pricing surface on Aquanode, and only the cheapest qualifying offer per provider is shown. A dash means that provider does not currently list that GPU.
Architecture, compute capability and supported precisions come from each vendor's published datasheet for that generation, not from the marketplace feed. This page regenerates at most once per hour.
Memory bandwidth, tensor TFLOPS, NVLink/interconnect and max board power are the same verified-from-datasheet figures shown on each model's own RTX 4000 SFF Ada page and RTX A4500 page, which link the primary vendor source for that model. A dash here means Aquanode hasn't verified that figure from a primary source yet, never a guess.
Go further
Check what fits in each card's memory with the RTX 4000 SFF Ada VRAM calculator and the RTX A4500 VRAM calculator, or browse every model by generation in the GPU index.
More RTX 4000 SFF Ada comparisons
More RTX A4500 comparisons
Related reading: H100 pricing and specs, H100 vs H200, A100 vs H100, H100 and H200: SXM vs NVL vs PCIe, and The best GPUs for AI, ranked.
