P4 vs RTX A4000: Specs, VRAM & Price
Short answer: choose the RTX A4000 when 16 GB of VRAM is the gating requirement. Choose the P4 when 8 GB is enough for the workload and the lower hourly rate points that way.
The P4 has 8 GB of VRAM; the RTX A4000 has 16 GB.
You can rent both by the hour, no purchase required. P4 from $0.069/GPU/hr; RTX A4000 from $0.167/GPU/hr. The P4 is 58% cheaper at the entry rate.
P4
Good for inference workloads on older-generation hardware
RTX A4000
Good for inference and small-scale training workloads
Last updated: 2026-10-10 22:00:58 UTCRefreshes hourly
Specs side by side
| Spec | P4 | RTX A4000 |
|---|---|---|
| VRAM | 8 GB | 16 GB |
| Memory bandwidth | – | 448 GB/s |
| Architecture | Pascal | Ampere |
| Compute capability | 6.1 | 8.6 |
| Precisions in hardware | FP32, FP16 | FP32, FP16, BF16, INT4 |
| Max board power (TDP) | – | 140W |
| Form factor | PCIe | – |
| Regions | 1 | 2 |
On-demand price
| Rate | P4 | RTX A4000 |
|---|---|---|
| Lowest per GPU/hr | $0.069/GPU/hr (cheapest overall) | $0.167/GPU/hr |
Which is better for AI: P4 or RTX A4000?
Choose the RTX A4000 when 16 GB of VRAM is the gating requirement. Choose the P4 when 8 GB is enough for the workload and the lower hourly rate points that way.
P4 vs RTX A4000: common questions
Is the P4 or the RTX A4000 better for AI?
Short answer: choose the RTX A4000 when 16 GB of VRAM is the gating requirement. Choose the P4 when 8 GB is enough for the workload and the lower hourly rate points that way.
Is the P4 or the RTX A4000 cheaper to rent?
On Aquanode's live marketplace the P4 starts at $0.069/GPU/hr (median $0.069/GPU/hr) and the RTX A4000 starts at $0.167/GPU/hr (median $0.187/GPU/hr). The P4 is the cheaper of the two at the entry rate, by 58%.
What is the difference between the P4 and the RTX A4000?
The P4 has 8 GB of VRAM against the RTX A4000's 16 GB; the P4 is a Pascal part and the RTX A4000 is Ampere (compute capability 6.1 vs 8.6); only the RTX A4000 supports BF16, INT4 compute. On price, the P4 lists from $0.069/GPU/hr and the RTX A4000 from $0.167/GPU/hr.
How widely available are the P4 and the RTX A4000?
The P4 is listed in 1 region and the RTX A4000 in 2 regions right now.
How much does 1,000 GPU-hours cost on the P4 vs the RTX A4000?
At the lowest rates listed today, 1,000 GPU-hours costs $69 on the P4 and $167 on the RTX A4000, a difference of $97 for the same runtime. Rates are per GPU per hour and update hourly.
How much VRAM does the P4 have compared to the RTX A4000?
The P4 has 8 GB of VRAM; the RTX A4000 has 16 GB.
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 P4 page and RTX A4000 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 P4 VRAM calculator and the RTX A4000 VRAM calculator, or browse every model by generation in the GPU index.
More P4 comparisons
More RTX A4000 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.
