RTX 4090 vs T4: Specs, VRAM & Price
Short answer: choose the RTX 4090 when 24 GB of VRAM is the gating requirement. Choose the T4 when 16 GB is enough for the workload and the lower hourly rate points that way.
The RTX 4090 has 24 GB of VRAM; the T4 has 16 GB.
You can rent both by the hour, no purchase required. RTX 4090 from $0.440/GPU/hr; T4 from $0.162/GPU/hr. The T4 is 63% cheaper at the entry rate.
RTX 4090
Good for inference and light fine-tuning workloads
T4
Good for inference workloads on older-generation hardware
Last updated: 2026-11-03 UTCRefreshes every 6 hours
Specs side by side
| Spec | RTX 4090 | T4 |
|---|---|---|
| VRAM | 24 GB | 16 GB |
| Memory bandwidth | 1,008 GB/s | 320+ GB/s |
| Architecture | Ada Lovelace | Turing |
| Compute capability | 8.9 | 7.5 |
| Precisions in hardware | FP32, FP16, BF16, FP8, INT4 | FP32, FP16, INT4 |
| Peak FP16/BF16 tensor TFLOPS | – | 65 TFLOPS |
| Max board power (TDP) | 450W | 70W |
| Form factor | PCIe 4.0 x16 | PCIe |
| Regions | 2 | 1 |
On-demand price
| Rate | RTX 4090 | T4 |
|---|---|---|
| Lowest per GPU/hr | $0.440/GPU/hr (cheapest overall) | $0.162/GPU/hr (cheapest overall) |
Which is better for AI: RTX 4090 or T4?
Choose the RTX 4090 when 24 GB of VRAM is the gating requirement. Choose the T4 when 16 GB is enough for the workload and the lower hourly rate points that way.
RTX 4090 vs T4: common questions
Is the RTX 4090 or the T4 better for AI?
Short answer: choose the RTX 4090 when 24 GB of VRAM is the gating requirement. Choose the T4 when 16 GB is enough for the workload and the lower hourly rate points that way.
Is the RTX 4090 or the T4 cheaper to rent?
On Aquanode's live marketplace the RTX 4090 starts at $0.440/GPU/hr (median $0.846/GPU/hr) and the T4 starts at $0.162/GPU/hr (median $0.162/GPU/hr). The T4 is the cheaper of the two at the entry rate, by 63%.
What is the difference between the RTX 4090 and the T4?
The RTX 4090 has 24 GB of VRAM against the T4's 16 GB; the RTX 4090 is an Ada Lovelace part and the T4 is Turing (compute capability 8.9 vs 7.5); only the RTX 4090 supports BF16, FP8 compute. On price, the RTX 4090 lists from $0.440/GPU/hr and the T4 from $0.162/GPU/hr.
How widely available are the RTX 4090 and the T4?
The RTX 4090 is listed in 2 regions and the T4 in 1 region right now.
How much does 1,000 GPU-hours cost on the RTX 4090 vs the T4?
At the lowest rates listed today, 1,000 GPU-hours costs $440 on the RTX 4090 and $162 on the T4, a difference of $278 for the same runtime. Rates are per GPU per hour and update hourly.
How much VRAM does the RTX 4090 have compared to the T4?
The RTX 4090 has 24 GB of VRAM; the T4 has 16 GB.
Does the RTX 4090 or the T4 support NVLink?
Neither the RTX 4090 nor the T4 has a dedicated GPU-to-GPU interconnect.
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 4090 page and T4 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 4090 VRAM calculator and the T4 VRAM calculator, see vendor-published throughput in the GPU benchmarks and specs table, or browse every model by generation in the GPU index.
More RTX 4090 comparisons
More T4 comparisons
Related reading: RTX 4090 pricing and specs, RTX 4090 for AI, RTX 5090 vs RTX 4090, and The best GPUs for AI, ranked.
