Two Nvidia data center GPUs, one Blackwell Ultra and one Pascal: up to 288 GB HBM3e against 24 GB GDDR5, 23x the memory bandwidth on the B300, and NVLink 1,800 GB/s on the B300 where the P40 is PCIe only.
At a glance
Updated 6 minutes ago- Memory
- 288 GB
- HBM3e
- Memory bandwidth
- 8.00 TB/s
- From
- $6.50 /GPU/hr
- 33 providers
- Memory
- 24 GB
- GDDR5
- Memory bandwidth
- 346 GB/s
- From
- --
Price comparison
Cheapest listed price per GPU per hour by billing type, and the median across providers.
| Billing | B300 | P40 | Difference |
|---|---|---|---|
| On-demand | $6.50 | -- | |
| Spot | $4.30 | No spot listings | |
| Reserved | $4.25 | No reserved listings | |
| Median | $7.89 | -- |
Median: Median across providers, one vote each, so a large catalog does not outweigh a small one.
Price history
B300 vs P40 price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | B300 | P40 | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 288 GB HBM3e | 24 GB GDDR5 | 12x more on B300 |
| Bandwidth | 8,000 GB/s | 346 GB/s | 23x higher on B300 |
| Bus width | 8,192-bit | 384-bit | 21x wider on B300 |
| Compute · dense | |||
| FP4 | 14,000 TFLOPS | Not supported | B300 only |
| FP8 | 4,500 TFLOPS | Not supported | B300 only |
| FP16 / BF16 | 2,250 TFLOPS | ||
| INT8 | 153.5 TOPS | 47 TOPS | 3.3x higher on B300 |
| FP32 | 75 TFLOPS | 12 TFLOPS | 6.2x higher on B300 |
| FP64 | 1.2 TFLOPS | Not supported | B300 only |
| Platform | |||
| Interconnect | NVLink 1,800 GB/s | PCIe only | NVLink on B300 only |
| Board power | 1,100 W | 250 W | 4.4x higher on B300 |
| Released | Q1 2025 | Q3 2016 | 8 years newer on B300 |
| Precision | |||
| Supported formats | FP4FP6FP8FP16BF16TF32FP32FP64INT8 | FP16FP32INT8 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: B300 datasheet and P40 datasheet.
Where to rent them
Providers listing these GPUs, those with both first, so you can switch without moving clouds.
| Provider | B300 /GPU/hr | P40 /GPU/hr |
|---|---|---|
GPU.ai
|
On-Demand $7.89 | -- |
Runpod
|
On-Demand $7.89 | -- |
Lium
|
On-Demand $8.00 | -- |
Vast.ai
|
On-Demand $12.13 | -- |
EmpirioLabs AI
|
On-Demand $16.00 | -- |
Spheron
|
Spot $5.85 | -- |
GPUaaS
|
Custom on request | -- |
Packet·ai
|
Custom on request | -- |
33 providers list the B300 and 0 the P40. Every listing is on the B300 page and the P40 page.
Similar GPUs
Other comparisons in the same class.
Our data for Nvidia B300 was last updated on Sept. 7, 2026, and for Nvidia P40 on Sept. 7, 2026.