# Realtime compositing need more CPU cores or GPU?

**URL:** <https://forums.unrealengine.com/t/realtime-compositing-need-more-cpu-cores-or-gpu/468353>\
**Category:** XR Development\
**Tags:** cpu-usage, AR, unreal-engine, Performance, question\
**Created:** [July 19, 2020, 2:21am UTC](https://forums.unrealengine.com/t/realtime-compositing-need-more-cpu-cores-or-gpu/468353 "2020-07-19T02:21:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![anonymous\_user\_3891b398](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_3891b398](https://forums.unrealengine.com/u/anonymous_user_3891b398)\
**Post date:** [July 19, 2020, 2:21am UTC](https://forums.unrealengine.com/t/realtime-compositing-need-more-cpu-cores-or-gpu/468353/1 "2020-07-19T02:21:26Z")

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I am doing an AR work for windows desktop (x64). This involves camera tracking + real time compositing on blackmagic (both I/O).

I’ve learned that UE is primaraly single threaded during game play (not dev, please correct me if i am wrong).

If it involves camera tracking and **specially realtime compositing** , which will the main driving force? CPU clock, CPU cores or GPU or Mix of these or something else.

more info:  
Game logic - nothing much. just few color transformations only.  
FPS - 50-60

\*\* i am looking at game play. Not development setup \*\*

P.S.  
at the moment i am looking at i5-9600k, R5-3600x & i7-9700k(worse case). cost is a concern. 🙂  
other confing - 16GB Ram + Evo SSD.

Thanks.