Both have 24 GB of memory. The RTX 3090 is newer, has 2.7x the bandwidth and is cheaper right now.
At a glance
Memory
Identical
- P40
- 24 GB
- RTX 3090
- 24 GB
Memory bandwidth
2.7x higher on RTX 3090
- P40
- 346 GB/s
- RTX 3090
- 936 GB/s
Cheapest on-demand
7% cheaper on RTX 3090
- P40
- $0.11 /GPU/hr
- RTX 3090
- $0.10 /GPU/hr
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
| Billing | P40 | RTX 3090 | Difference |
|---|---|---|---|
| On-demand | -- /GPU/hr from $0.11 | $0.22 /GPU/hr from $0.10 | |
| Reserved | No reserved listings | -- /GPU/hr from $0.06 (1 mo) | |
| Spot | -- /GPU/hr from $0.07 | -- /GPU/hr from $0.05 |
Heads up: A provider's own page may quote a different figure, for example on tax, region or a promotion. A monthly-only plan shows a derived hourly rate. Medians are across providers, one vote each, so a large catalog does not outweigh a small one. No median for on-demand and spot on the P40 and reserved and spot on the RTX 3090: we only show one when at least 3 providers list the GPU on that billing type. Verify before provisioning. More on how we price.
Price history
P40 vs RTX 3090 price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | P40 | RTX 3090 | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 24 GB GDDR5 | 24 GB GDDR6X | Identical |
| Bandwidth | 346 GB/s | 936 GB/s | 2.7x higher on RTX 3090 |
| Bus width | 384-bit | 384-bit | Identical |
| Compute · dense | |||
| FP16 / BF16 | 71.2 TFLOPS | ||
| INT8 | 47 TOPS | 284.7 TOPS | 6.1x higher on RTX 3090 |
| FP32 | 12 TFLOPS | 35.6 TFLOPS | 3x higher on RTX 3090 |
| Platform | |||
| Interconnect | PCIe only | NVLink 112 GB/s | NVLink on RTX 3090 only |
| Board power | 250 W | 350 W | 40% higher on RTX 3090 |
| Released | Q3 2016 | Q3 2020 | 4 years newer on RTX 3090 |
| Precision | |||
| Supported formats | FP16FP32INT8 | FP16BF16TF32FP32INT4INT8 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: P40 datasheet and RTX 3090 datasheet.
Where to rent them
Providers that rent these GPUs, with each one's cheapest rate. Providers that rent both are listed first.
| Provider | P40 | RTX 3090 |
|---|---|---|
Vast.ai
USA
|
$0.11 /GPU/hr On-demand | $0.12 /GPU/hr On-demand |
HyperAI
Hong Kong
|
-- | $0.10 /GPU/hr On-demand |
GPU.ai
UAE
|
-- | $0.15 /GPU/hr On-demand |
Lium
Distributed
|
-- | $0.16 /GPU/hr On-demand |
Salad
Distributed
|
-- | $0.17 /GPU/hr On-demand |
Runpod
USA
|
-- | $0.22 /GPU/hr On-demand |
EmpirioLabs AI
USA
|
-- | $0.45 /GPU/hr On-demand |
SwissGPU
Switzerland
|
-- | $0.30 /GPU/hr On-demand |
1 provider list the P40 and 9 the RTX 3090. Every listing is on the P40 page and the RTX 3090 page.
Similar GPUs
Other comparisons in the same class.
-
Nvidia L4
24 GB GDDR6 · 13% less bandwidth than the P40
From $0.32 /GPU/hr Compare -
Nvidia T4
16 GB GDDR6 · 13% less bandwidth than the P40
From $0.10 /GPU/hr Compare
-
Nvidia A10
24 GB GDDR6 · 73% more bandwidth than the P40
From $0.20 /GPU/hr Compare
-
Nvidia RTX 5090
32 GB GDDR7 · 91% more bandwidth than the RTX 3090
From $0.35 /GPU/hr Compare
-
Nvidia RTX 4090
24 GB GDDR6X · PCIe only
From $0.33 /GPU/hr Compare
Our data for Nvidia P40 was last updated on Sept. 14, 2026, and for Nvidia RTX 3090 on Sept. 14, 2026.