# Bad lag and stuttering in Source Unpack?

**URL:** <https://forums.sourceruns.org/t/bad-lag-and-stuttering-in-source-unpack/2753>\
**Category:** Portal\
**Created:** [October 20, 2015, 2:46am UTC](https://forums.sourceruns.org/t/bad-lag-and-stuttering-in-source-unpack/2753 "2015-10-20T02:46:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![mav6771](https://b-cdn.sourceruns.org/letter_avatar_proxy/v4/letter/m/da6949/32.png) [@mav6771](https://forums.sourceruns.org/u/mav6771)\
**Post date:** [October 20, 2015, 2:46am UTC](https://forums.sourceruns.org/t/bad-lag-and-stuttering-in-source-unpack/2753/1 "2015-10-20T02:46:22Z")

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When I play the steam release of the game, it runs smooth with no stuttering.

But with the source Unpack, at the same settings, I get stuttering every time I look around, making some chambers much harder than on steam.

Specs:

AMD FX 4300  
Nvidia GTX 750 Ti  
1TB HDD  
8GB Ram

Any ideas?

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**Author:** ![traderain](https://b-cdn.sourceruns.org/user_avatar/forums.sourceruns.org/traderain/32/118_2.png) [@traderain](https://forums.sourceruns.org/u/traderain)\
**Post date:** [October 20, 2015, 9:09am UTC](https://forums.sourceruns.org/t/bad-lag-and-stuttering-in-source-unpack/2753/2 "2015-10-20T09:09:48Z")

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Please post your questions into the helpdesk thread in the future.

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**Author:** ![BitRain](https://b-cdn.sourceruns.org/user_avatar/forums.sourceruns.org/bitrain/32/208_2.png) [@BitRain](https://forums.sourceruns.org/u/BitRain)\
**Post date:** [October 20, 2015, 10:20am UTC](https://forums.sourceruns.org/t/bad-lag-and-stuttering-in-source-unpack/2753/3 "2015-10-20T10:20:43Z")

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Try removing “-window -borderless” from the Portal launcher.