P4 vs RTX PRO 4000: Specs, VRAM & Price
Short answer: choose the RTX PRO 4000 when 24 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 PRO 4000 has 24 GB.
You can rent both by the hour, no purchase required. P4 from $0.069/GPU/hr; RTX PRO 4000 from $0.449/GPU/hr. The P4 is 85% cheaper at the entry rate.
P4
Good for inference workloads on older-generation hardware
RTX PRO 4000
Good for inference and light fine-tuning workloads
Last updated: 2026-10-10 22:49:43 UTCRefreshes hourly
Specs side by side
| Spec | P4 | RTX PRO 4000 |
|---|---|---|
| VRAM | 8 GB | 24 GB |
| Architecture | Pascal | Blackwell |
| Compute capability | 6.1 | 12.0 |
| Precisions in hardware | FP32, FP16 | FP32, FP16, BF16, FP8, INT4 |
| Form factor | PCIe | – |
| Regions | 1 | 2 |
On-demand price
| Rate | P4 | RTX PRO 4000 |
|---|---|---|
| Lowest per GPU/hr | $0.069/GPU/hr (cheapest overall) | $0.627/GPU/hr |
Which is better for AI: P4 or RTX PRO 4000?
Choose the RTX PRO 4000 when 24 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 PRO 4000: common questions
Is the P4 or the RTX PRO 4000 better for AI?
Short answer: choose the RTX PRO 4000 when 24 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 PRO 4000 cheaper to rent?
On Aquanode's live marketplace the P4 starts at $0.069/GPU/hr (median $0.069/GPU/hr) and the RTX PRO 4000 starts at $0.449/GPU/hr (median $0.627/GPU/hr). The P4 is the cheaper of the two at the entry rate, by 85%.
What is the difference between the P4 and the RTX PRO 4000?
The P4 has 8 GB of VRAM against the RTX PRO 4000's 24 GB; the P4 is a Pascal part and the RTX PRO 4000 is Blackwell (compute capability 6.1 vs 12.0); only the RTX PRO 4000 supports BF16, FP8, INT4 compute. On price, the P4 lists from $0.069/GPU/hr and the RTX PRO 4000 from $0.449/GPU/hr.
How widely available are the P4 and the RTX PRO 4000?
The P4 is listed in 1 region and the RTX PRO 4000 in 2 regions right now.
How much does 1,000 GPU-hours cost on the P4 vs the RTX PRO 4000?
At the lowest rates listed today, 1,000 GPU-hours costs $69 on the P4 and $449 on the RTX PRO 4000, a difference of $379 for the same runtime. Rates are per GPU per hour and update hourly.
How much VRAM does the P4 have compared to the RTX PRO 4000?
The P4 has 8 GB of VRAM; the RTX PRO 4000 has 24 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 PRO 4000 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 PRO 4000 VRAM calculator, or browse every model by generation in the GPU index.
More P4 comparisons
More RTX PRO 4000 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.
