# Unreal Engine 4.27 Preview

**URL:** <https://forums.unrealengine.com/t/unreal-engine-4-27-preview/234295>\
**Category:** Announcements\
**Tags:** unreal-engine, UE4-27\
**Created:** [June 8, 2021, 3:00pm UTC](https://forums.unrealengine.com/t/unreal-engine-4-27-preview/234295 "2021-06-08T15:00:44Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Miguel1900](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/miguel1900/32/1010694_2.png) [@Miguel1900](https://forums.unrealengine.com/u/Miguel1900)\
**Post date:** [June 8, 2021, 4:27pm UTC](https://forums.unrealengine.com/t/unreal-engine-4-27-preview/234295/5 "2021-06-08T16:27:07Z")

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> [@Amanda.Schade](#):
>
> stream

Thank you guys,

Did you ‘fix’ or ‘improved’ the 30% performance drop present in UE4.26? [4.26 performance - #101 by Miguel1900](https://forums.unrealengine.com/t/4-26-performance/154610/101)

Is it forward compatible with UE5?

Is UE5EA backward compatible with UE4.27, as with 4.26?

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