# Low Capacity Instances (GPUs)

## On AWS

There are multiple types of commitments that AWS offers, some of which — like Zonal Standard Reserved Instances (RIs) — come bundled with a capacity reservation to ensure access to the underlying machine being covered. See [AWS capacity reservations documentation](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-capacity-reservations.html) for more details.

By default, Archera Guaranteed Commitments are created from Regional Standard RIs or Savings Plans, which don't come with a capacity reservation; however, they can synergize with an existing capacity reservation to provide a billing discount.

In certain circumstances — particularly with machines like GPUs that have low-capacity-availability — Archera supports creating Guaranteed RIs (GRIs) from **Zonal Standard RIs**, which do come with a capacity reservation and can give customers the peace of mind that they will always have access to spin up the machine they are committed to.

Please note that this is **not the default GRI option** and you will have to contact us in order to make use of this option.

If you are interested in using Zonal GRIs with a capacity reservation, please contact <support@archera.ai> to learn more.

## Related Resources

* [How Does Guaranteed Commitment Pricing Work?](https://docs.archera.ai/help-center/guaranteed-commitments/pricing)
* [What are Guaranteed Commitments?](https://docs.archera.ai/help-center/guaranteed-commitments/what-are-guaranteed-commitments)
* [Does Archera support On Capacity Demand Reservations? (OCDR)](https://docs.archera.ai/help-center/faq/ocdr)