The B300 is newer, with 144x the memory and 276x the bandwidth.
At a glance
Memory
144x more on B300
- B300
- 288 GB
- K620
- 2 GB
Memory bandwidth
276x higher on B300
- B300
- 8,000 GB/s
- K620
- 29 GB/s
Cheapest on-demand
- B300
- $4.99 /GPU/hr
- K620
- --
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
| Billing | B300 | K620 | Difference |
|---|---|---|---|
| On-demand | $8.50 /GPU/hr from $4.99 | No on-demand listings | |
| Reserved | $6.25 /GPU/hr from $4.25 | No reserved listings | |
| Spot | $5.26 /GPU/hr from $4.08 | No spot listings |
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. Verify before provisioning. More on how we price.
Price history
B300 vs K620 price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | B300 | K620 | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 288 GB HBM3e | 2 GB DDR3 | 144x more on B300 |
| Bandwidth | 8,000 GB/s | 29 GB/s | 276x higher on B300 |
| Bus width | 8,192-bit | 128-bit | 64x 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 | Not supported | B300 only |
| INT8 | 153.5 TOPS | Not supported | B300 only |
| FP32 | 75 TFLOPS | 0.9 TFLOPS | 87x 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 | 45 W | 24x higher on B300 |
| Released | Q1 2025 | Q3 2014 | 11 years newer on B300 |
| Precision | |||
| Supported formats | FP4FP6FP8FP16BF16TF32FP32FP64INT8 | FP32 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: B300 datasheet and K620 datasheet.
Where to rent them
Providers that rent these GPUs, with each one's cheapest rate. No provider we track offers both right now.
| Provider | B300 | K620 |
|---|---|---|
Daytona
USA
|
$7.10 /GPU/hr On-demand | -- |
GPU.ai
UAE
|
$7.89 /GPU/hr On-demand SXM | -- |
Runpod
USA
|
$7.89 /GPU/hr On-demand SXM | -- |
Lium
Distributed
|
$8.00 /GPU/hr On-demand SXM | -- |
Vast.ai
USA
|
$9.94 /GPU/hr On-demand | -- |
EmpirioLabs AI
USA
|
$16.00 /GPU/hr On-demand | -- |
Spheron
Singapore
|
$5.81 /GPU/hr Spot SXM | -- |
GPUaaS
USA
|
$5.00 /GPU/hr Custom SXM | -- |
34 providers list the B300 and 0 the K620. Every listing is on the B300 page and the K620 page.
Similar GPUs
Other comparisons in the same class.
-
Nvidia H100
80 GB HBM3 · 58% less bandwidth than the B300
From $1.73 /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
Our data for Nvidia B300 was last updated on Sept. 14, 2026, and for Nvidia K620 on Sept. 14, 2026.