Two Nvidia workstation GPUs, one Maxwell and one Turing: 2 GB DDR3 against 8 GB GDDR6 and 14x the memory bandwidth on the RTX 4000.
At a glance
Memory
- K620
- 2 GB
- RTX 4000
- 8 GB
4x more on RTX 4000
Memory bandwidth
- K620
- 29 GB/s
- RTX 4000
- 416 GB/s
14x higher on RTX 4000
Cheapest on-demand
- K620
- --
- RTX 4000
- $0.56 /GPU/hr
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
| Billing | K620 | RTX 4000 | Difference |
|---|---|---|---|
| On-demand | No on-demand listings | -- /GPU/hr from $0.56 |
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 on the RTX 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
K620 vs RTX 4000 price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | K620 | RTX 4000 | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 2 GB DDR3 | 8 GB GDDR6 | 4x more on RTX 4000 |
| Bandwidth | 29 GB/s | 416 GB/s | 14x higher on RTX 4000 |
| Bus width | 128-bit | 256-bit | 2x wider on RTX 4000 |
| Compute · dense | |||
| FP16 / BF16 | Not supported | 57 TFLOPS | RTX 4000 only |
| FP32 | 0.9 TFLOPS | 7.1 TFLOPS | 8.3x higher on RTX 4000 |
| Platform | |||
| Interconnect | PCIe only | PCIe only | |
| Board power | 45 W | 160 W | 3.6x higher on RTX 4000 |
| Released | Q3 2014 | Q4 2018 | 4 years newer on RTX 4000 |
| Precision | |||
| Supported formats | FP32 | FP16FP32INT4INT8 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: K620 datasheet and RTX 4000 datasheet.
Where to rent them
Providers listing these GPUs, those with both first, so you can switch without moving clouds.
| Provider | K620 /GPU/hr | RTX 4000 /GPU/hr |
|---|---|---|
Paperspace
|
-- | On-Demand $0.56 |
Similar GPUs
Other comparisons in the same class.
-
Nvidia RTX 4000 Ada
From $0.18 /GPU/hr Compare -
Nvidia A4000
From $0.07 /GPU/hr Compare
Our data for Nvidia K620 was last updated on Sept. 7, 2026, and for Nvidia RTX 4000 on Sept. 7, 2026.