---
title: MTLBufferSparseTier.tier1
framework: metal
role: symbol
role_heading: Case
path: metal/mtlbuffersparsetier/tier1
---

# MTLBufferSparseTier.tier1

Indicates support for sparse buffers tier 1.

## Declaration

```swift
case tier1
```

## Discussion

Discussion Tier 1 sparse buffers allow the following: Partial memory backing at sparse page granularity. Defined behavior for accessing an unbacked buffer range. An unbacked buffer range indicates a range within the buffer that doesn’t have memory backing at a given point in time. Accessing an unbacked buffer range of a sparse buffer produces the following results: Reading return zero. Writing produces no result.