The B300 has 12x the memory and 12x the bandwidth. The RTX PRO 4000 is cheaper right now.
At a glance
Memory
12x more on B300
- B300
- 288 GB
- RTX PRO 4000
- 24 GB
Memory bandwidth
12x higher on B300
- B300
- 8,000 GB/s
- RTX PRO 4000
- 672 GB/s
Cheapest on-demand
96% cheaper on RTX PRO 4000
- B300
- $4.99 /GPU/hr
- RTX PRO 4000
- $0.20 /GPU/hr
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
| Billing | B300 | RTX PRO 4000 | Difference |
|---|---|---|---|
| On-demand | $8.50 /GPU/hr from $4.99 | -- /GPU/hr from $0.20 | |
| Reserved | $6.50 /GPU/hr from $4.25 | -- /GPU/hr from $0.26 (24 mo) | |
| Spot | $5.20 /GPU/hr from $2.99 | -- /GPU/hr from $0.14 |
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, reserved and spot on the RTX PRO 4000: 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
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 | 92% 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 that rent these GPUs, with each one's cheapest rate. Providers that rent both are listed first.
| Provider | B300 | RTX PRO 4000 |
|---|---|---|
Vast.ai
USA
|
$9.94 /GPU/hr On-demand | $0.20 /GPU/hr On-demand |
Runpod
USA
|
$7.89 /GPU/hr On-demand SXM | $0.57 /GPU/hr On-demand |
Daytona
USA
|
$7.10 /GPU/hr On-demand | -- |
Lium
Distributed
|
$7.85 /GPU/hr On-demand SXM | -- |
GPU.ai
UAE
|
$7.89 /GPU/hr On-demand SXM | -- |
Lyceum
Germany
|
$7.99 /GPU/hr On-demand | -- |
Verda
Finland
|
$8.71 /GPU/hr On-demand SXM | -- |
EmpirioLabs AI
USA
|
$15.70 /GPU/hr On-demand | -- |
Database Mart
USA
|
-- | $0.26 /GPU/hr Reserved |
34 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.
-
Nvidia H100
80 GB HBM3 · 58% less bandwidth than the B300
From $1.30 /GPU/hr Compare -
Nvidia B200
180 GB HBM3e · released Q1 2024
From $3.75 /GPU/hr Compare
-
Nvidia H200
141 GB HBM3e · 40% less bandwidth than the B300
From $2.09 /GPU/hr Compare
-
Nvidia A4000
16 GB GDDR6 · 33% less bandwidth than the RTX PRO 4000
From $0.07 /GPU/hr Compare
Our data for Nvidia B300 was last updated on Sept. 14, 2026, and for Nvidia RTX PRO 4000 on Sept. 14, 2026.