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What is the "magic" of alt+tab?

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You can't really test it the way he stated it though, because you can only change priority after launching it. You can't get it to launch that way.

Anyways OP, seems to me if the game doesn't run well unless you Alt+Tab first, you might have too many background programs, a bad install, or corrupt system files, because that's not normal.

Actually, you can change application priority when you launch it with "start" command. You can use this with command prompt (preferably elevated) or batch file.

For example you want to run notepad.exe with above normal pirority :

start /abovenormal notepad.exe

For priority value you can use : realtime, high, abovenormal, normal, belownormal, low.

Don't want to mess about with command line? Use 3rd party application like Process Lasso.
 
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Ok, so I was still doing the alt+tab thingy, used to it :p Just now I tried the game without doing it and it was smooth now without alt+tabbing using the 372.54 driver.
It must have been a driver thing then, I was using 368.39 all the time before this latest driver.
 

tabascosauz

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Ok, so I was still doing the alt+tab thingy, used to it :p Just now I tried the game without doing it and it was smooth now without alt+tabbing using the 372.54 driver.
It must have been a driver thing then, I was using 368.39 all the time before this latest driver.

I can confirm that this is true with GTA V on my side. This is not an isolated incident due to some "problem" on his comp. Just do a google search and a whole bunch of posts in all different sites comes up describing this strange alt-tab fix.

I also run it in 1080p fullscreen; when in borderless, I don't believe I have to do it (alt-tab doesn't make a difference), but borderless causes noticeably lower performance for those who can't afford GTX 1080 (not to be taken literally, but you get the point: powerful cards don't exhibit the same difference). I think it is all dependent on drivers / specific card, as I don't recall needing to alt-tab with my other 280X rig, and no worse performance on borderless.

Perhaps those with very powerful cards will not notice these two issues.

PS: P4 seems to have found his fix in the 372 driver, but I have updated to no avail. Probably is just because my card isn't even powerful enough to manage a consistent 60fps.
 
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eidairaman1

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Id force priority of the game files to max in task manager
 
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I noticed alt-tabbing out of and back into Heaven lowers the benchmark result by 10% or so, which bugs me. Windows ...
 
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run in borderless windowed mode, and avoid that requirement of Alt+Tab. it looks the same as fullscreen, but it will fixed issues tied with running in Fullscreen.
 
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