# Linux x64 Runners (https://tenki.cloud/docs/runners/x64-runners)

> For the complete documentation index, see [llms.txt](https://tenki.cloud/llms.txt)

Browse Tenki Cloud's range of x64 Runners with various CPU and memory configurations. Find the perfect performance tier for your workflow needs from 2 to 16 vCPUs.



Tenki's x64 Standard Runners use 4th Gen AMD EPYC processors with a 1:2 physical-to-virtual core mapping. Each pair of x64 vCPUs corresponds to a single physical core, which keeps compute performance consistent and predictable.

This mapping gives predictable resource utilization and price-performance for CI workloads and ephemeral compute tasks.

> **Important:** We've changed the default version of our runners image to Ubuntu 24.04.

| **Runner Offering**               | **Compute** | **Memory** |
| --------------------------------- | ----------- | ---------- |
| tenki-standard-small-2c-4g        | 2 CPU       | 4 GB       |
| tenki-standard-medium-4c-8g       | 4 CPU       | 8 GB       |
| tenki-standard-large-8c-16g       | 8 CPU       | 16 GB      |
| tenki-standard-large-plus-16c-32g | 16 CPU      | 32 GB      |

> **Need more compute?:** Additional and larger runners are available on the Team plan. Email hello@tenki.cloud and we'll provision them for your workspace.

Concurrency [#concurrency]

The default concurrent-job limit depends on your plan, see [Limits, Concurrency & Cold Start](/docs/runners/limits-and-concurrency) for the full reference. Higher concurrency is available on request.

Image [#image]

Tenki uses the official GitHub Actions runner images for AMD runners, available at [`actions/runner-images`](https://github.com/actions/runner-images), so anything that runs on GitHub Actions Linux runners also runs on Tenki. For the full image story (Linux + macOS + custom builds), see [Runner Images](/docs/runners/runner-images).

Nested virtualization (KVM) [#nested-virtualization-kvm]

KVM nested virtualization can be enabled on x64 runners on request. This is the configuration you want for **Android emulator workloads** (Espresso, instrumented UI tests), see [Android Emulator](/docs/runners/android-emulator) for a full example and recommended runner sizes.

Custom image [#custom-image]

We support custom images. To get your image deployed to our fabric, contact us at [hello@tenki.cloud](mailto:hello@tenki.cloud), see [Runner Images](/docs/runners/runner-images) for the full custom-image story.