A data center GPU against a workstation card, one Blackwell Ultra and one Blackwell: up to 288 GB HBM3e against 24 GB GDDR7, 12x the memory bandwidth on the B300, and NVLink 1,800 GB/s on the B300 where the RTX PRO 4000 is PCIe only.
At a glance
Updated 7 minutes ago- Memory
- 288 GB
- HBM3e
- Memory bandwidth
- 8.00 TB/s
- From
- $6.50 /GPU/hr
- 33 providers
- Memory
- 24 GB
- GDDR7
- Memory bandwidth
- 672 GB/s
- From
- $20.00 /GPU/hr
- 3 providers
Price comparison
Cheapest listed price per GPU per hour by billing type, and the median across providers.
| Billing | B300 | RTX PRO 4000 | Difference |
|---|---|---|---|
| On-demand | $6.50 | $20.00 | 3.1x more expensive on RTX PRO 4000 |
| Spot | $4.30 | $13.33 | 3.1x more expensive on RTX PRO 4000 |
| Reserved | $4.25 | $0.26 | 16x more expensive on B300 |
| Median | $7.89 | $20.00 | 2.5x more expensive on RTX PRO 4000 |
Median: Median across providers, one vote each, so a large catalog does not outweigh a small one.
Price history
B300 vs RTX PRO 4000 price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | B300 | RTX PRO 4000 | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 288 GB HBM3e | 24 GB GDDR7 | 12x more on B300 |
| Bandwidth | 8,000 GB/s | 672 GB/s | 12x higher on B300 |
| Bus width | 8,192-bit | 192-bit | 43x wider on B300 |
| Compute · dense | |||
| FP4 | 14,000 TFLOPS | 589 TFLOPS | 24x higher on B300 |
| FP8 | 4,500 TFLOPS | 294.5 TFLOPS | 15x higher on B300 |
| FP16 / BF16 | 2,250 TFLOPS | 147.3 TFLOPS | 15x higher on B300 |
| INT8 | 153.5 TOPS | 294.5 TOPS | 1.9x higher on RTX PRO 4000 |
| FP32 | 75 TFLOPS | 37 TFLOPS | 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 | 145 W | 7.6x higher on B300 |
| Released | Q1 2025 | Q1 2025 | |
| Precision | |||
| Supported formats | FP4FP6FP8FP16BF16TF32FP32FP64INT8 | FP4FP8FP16BF16TF32FP32INT8 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: B300 datasheet and RTX PRO 4000 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 PRO 4000 /GPU/hr |
|---|---|---|
Vast.ai
|
On-Demand $12.13 | On-Demand $20.00 |
Runpod
|
On-Demand $7.89 | Reservation on request |
GPU.ai
|
On-Demand $7.89 | -- |
Lium
|
On-Demand $8.00 | -- |
EmpirioLabs AI
|
On-Demand $16.00 | -- |
Spheron
|
Spot $5.85 | -- |
GPUaaS
|
Custom on request | -- |
Packet·ai
|
Custom on request | -- |
Database Mart
|
-- | Reserved (24mo) $0.26 |
33 providers list the B300 and 3 the RTX PRO 4000. Every listing is on the B300 page and the RTX PRO 4000 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 PRO 4000 on Sept. 7, 2026.