A data center GPU against a consumer card, one Blackwell Ultra and one Ampere: up to 288 GB HBM3e against 24 GB GDDR6X and 8.5x the memory bandwidth on the B300.
At a glance
Updated 4 minutes ago- Memory
- 288 GB
- HBM3e
- Memory bandwidth
- 8.00 TB/s
- From
- $6.50 /GPU/hr
- 31 providers
- Memory
- 24 GB
- GDDR6X
- Memory bandwidth
- 936 GB/s
- From
- $0.10 /GPU/hr
- 10 providers
Price comparison
Cheapest listed price per GPU per hour by billing type, and the median across providers.
| Billing | B300 | RTX 3090 | Difference |
|---|---|---|---|
| On-demand | $6.50 | $0.10 | 65x more expensive on B300 |
| Spot | $4.30 | $0.05 | 89x more expensive on B300 |
| Reserved | $4.25 | $0.06 | 71x more expensive on B300 |
| Median | $7.87 | $0.28 | 29x more expensive on B300 |
Median: Median across providers, one vote each, so a large catalog does not outweigh a small one.
Price history
B300 vs RTX 3090 price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | B300 | RTX 3090 | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 288 GB HBM3e | 24 GB GDDR6X | 12x more on B300 |
| Bandwidth | 8,000 GB/s | 936 GB/s | 8.5x 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 | 71.2 TFLOPS | 32x higher on B300 |
| INT8 | 153.5 TOPS | 284.7 TOPS | 1.9x higher on RTX 3090 |
| FP32 | 75 TFLOPS | 35.6 TFLOPS | 2.1x higher on B300 |
| FP64 | 1.2 TFLOPS | Not supported | B300 only |
| Platform | |||
| Interconnect | NVLink 1,800 GB/s | NVLink 112 GB/s | 16x higher on B300 |
| Board power | 1,100 W | 350 W | 3.1x higher on B300 |
| Released | Q1 2025 | Q3 2020 | 4 years newer on B300 |
| Precision | |||
| Supported formats | FP4FP6FP8FP16BF16TF32FP32FP64INT8 | FP16BF16TF32FP32INT4INT8 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: B300 datasheet and RTX 3090 datasheet.
Where to rent them
Providers listing these GPUs, those with both first, so you can switch without moving clouds.
| Provider | B300 /GPU/hr | RTX 3090 /GPU/hr |
|---|---|---|
GPU.ai
|
On-Demand $7.89 | On-Demand $0.13 |
Runpod
|
On-Demand $7.89 | On-Demand $0.22 |
Vast.ai
|
On-Demand $8.75 | On-Demand $0.12 |
GPUaaS
|
Custom on request | -- |
Packet·ai
|
Custom on request | -- |
Impossible Cloud
|
Reserved (60mo) $4.32 | -- |
Canopy Wave
|
Custom on request | -- |
Bentaus
|
On-Demand $6.50 | -- |
HyperAI
|
-- | On-Demand $0.10 |
Lium
|
-- | On-Demand $0.13 |
Theta EdgeCloud
|
-- | On-Demand $0.13 |
Salad
|
-- | On-Demand $0.25 |
EmpirioLabs AI
|
-- | On-Demand $0.30 |
31 providers list the B300 and 10 the RTX 3090. Every listing is on the B300 page and the RTX 3090 page.
Similar GPUs
Other comparisons in the same class.
Our data for Nvidia B300 was last updated on Sept. 7, 2026, and for Nvidia RTX 3090 on Sept. 7, 2026.