RTX PRO 4000 vs RTX PRO 6000 WS: Specs, VRAM & Price
Short answer: choose the RTX PRO 6000 WS when 96 GB of VRAM is the gating requirement. Choose the RTX PRO 4000 when 24 GB is enough for the workload and the lower hourly rate points that way.
The RTX PRO 4000 has 24 GB of VRAM; the RTX PRO 6000 WS has 96 GB.
You can rent both by the hour, no purchase required. RTX PRO 4000 from $0.449/GPU/hr; RTX PRO 6000 WS from $1.57/GPU/hr. The RTX PRO 4000 is 71% cheaper at the entry rate.
RTX PRO 4000
Good for inference and light fine-tuning workloads
RTX PRO 6000 WS
Good for training and serving frontier-scale LLMs
Last updated: 2026-10-10 22:53:35 UTCRefreshes hourly
Specs side by side
| Spec | RTX PRO 4000 | RTX PRO 6000 WS |
|---|---|---|
| VRAM | 24 GB | 96 GB |
| Memory bandwidth | – | 1,792 GB/s |
| Architecture | Blackwell | Blackwell |
| Compute capability | 12.0 | 12.0 |
| Precisions in hardware | FP32, FP16, BF16, FP8, INT4 | FP32, FP16, BF16, FP8, INT4 |
| Max board power (TDP) | – | 600W |
| Regions | 2 | 1 |
On-demand price
| Rate | RTX PRO 4000 | RTX PRO 6000 WS |
|---|---|---|
| Lowest per GPU/hr | $0.627/GPU/hr | $1.57/GPU/hr (cheapest overall) |
Which is better for AI: RTX PRO 4000 or RTX PRO 6000 WS?
Choose the RTX PRO 6000 WS when 96 GB of VRAM is the gating requirement. Choose the RTX PRO 4000 when 24 GB is enough for the workload and the lower hourly rate points that way.
RTX PRO 4000 vs RTX PRO 6000 WS: common questions
Is the RTX PRO 4000 or the RTX PRO 6000 WS better for AI?
Short answer: choose the RTX PRO 6000 WS when 96 GB of VRAM is the gating requirement. Choose the RTX PRO 4000 when 24 GB is enough for the workload and the lower hourly rate points that way.
Is the RTX PRO 4000 or the RTX PRO 6000 WS cheaper to rent?
On Aquanode's live marketplace the RTX PRO 4000 starts at $0.449/GPU/hr (median $0.627/GPU/hr) and the RTX PRO 6000 WS starts at $1.57/GPU/hr (median $1.71/GPU/hr). The RTX PRO 4000 is the cheaper of the two at the entry rate, by 71%.
What is the difference between the RTX PRO 4000 and the RTX PRO 6000 WS?
The RTX PRO 4000 has 24 GB of VRAM against the RTX PRO 6000 WS's 96 GB; both are Blackwell parts; both run BF16, FP8, INT4 workloads in hardware. On price, the RTX PRO 4000 lists from $0.449/GPU/hr and the RTX PRO 6000 WS from $1.57/GPU/hr.
How widely available are the RTX PRO 4000 and the RTX PRO 6000 WS?
The RTX PRO 4000 is listed in 2 regions and the RTX PRO 6000 WS in 1 region right now.
How much does 1,000 GPU-hours cost on the RTX PRO 4000 vs the RTX PRO 6000 WS?
At the lowest rates listed today, 1,000 GPU-hours costs $449 on the RTX PRO 4000 and $1,570 on the RTX PRO 6000 WS, a difference of $1,122 for the same runtime. Rates are per GPU per hour and update hourly.
How much VRAM does the RTX PRO 4000 have compared to the RTX PRO 6000 WS?
The RTX PRO 4000 has 24 GB of VRAM; the RTX PRO 6000 WS has 96 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 RTX PRO 4000 page and RTX PRO 6000 WS 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 PRO 4000 VRAM calculator and the RTX PRO 6000 WS VRAM calculator, or browse every model by generation in the GPU index.
More RTX PRO 4000 comparisons
More RTX PRO 6000 WS 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.
