Question Slow Alt Tab Windows 10

[Pepsy89]

Guys i have a huge issue... i'm a streamer on youtube and i have dual stream pc setup... Usualy i play PUBG and the alt-tab is very slow and when i alt tab it cuts my sound for a second... like is freezing or somehow and i can't find a fix for it...
I have to say that my main monitor is cloned with elgato capture card and is set to 180hz refresh rate ( tryed diferent refresh rate and same issue)
Can this be caused becouse i have diferent monitors with diferent refresh rate? All of the monitors have the same setting except refresh rate. They are set on full hd resolution.

What i tryed and didin't fixed this issue :
• Reinstaled clean windows
• Disabled focus assit in windows
• Cleaned Activity History
• Tryed all "Scaling settings" from Nvidia control pannel ( "Aspect ratio" "Full-Screen" "No scaling" - Performed on GPU - The best working one is on "Full-screen)

🎮 Gaming PC

• Procesor: i7-8700K CPU @ 5.00 GHz
• Motherboard : MSI Z370 GAMING PRO CARBON
• Graphic Card: GIGABYTE RTX 2080 Ti GAMING OC
• Memorie: Vengeance LPX Black 16GB DDR4 3200MHz CL16 Dual Channel Kit
• SSD ADATA Premier Pro SP550 Series 128GB
• Samsung SSD 850 EVO mSATA 1TB
• Sursa: Sursa Seasonic Focus+, 80+ Gold, 750W
• OS: Microsoft Windows 10 Pro

🎮 Stream PC

• Procesor: i7-8700K CPU @ 4.90 GHz
• Motherboard : MSI Z370-A PRO
• Graphic Card: MSI GeForce GTX 1080 Ti AERO 11G OC
• Memorie: Corsair Vengeance LPX Black 16GB DDR4 3000MHz
• SSD Kingston SSDNow UV400 120GB SATA-III 2.5 inch
• Hard disk WD Blue 1TB SATA-III 7200 RPM 64MB
• Soruce : Chieftec A-90 Series GDP-550C 550W
• Capture Card: Elgato Game Capture HD60 Pro, Black
• OS: Microsoft Windows 10 Pro


🎮 Monitors
• Main Monitor: ASUS ROG PG248Q
• Secondary Monitors: Zowie BenQ XL2411P & DELL U2414H

 

[helpstar]

undo overclocking and try again

update the BIOS of both motherboards

 

[Pepsy89]

undo overclocking and try again

update the BIOS of both motherboards

the bios are the latest ones, i will go on dephault settings and see than if i have the same issue. I will come back with an answer. But i can say from begining, that this issue happends even worst when i duplicate my main monitor with elgato capture card, and the streaming pc is not even running

 

[Pepsy89]

undo overclocking and try again

update the BIOS of both motherboards

same issue with no overclock

 

[Pepsy89]

noone ?

 

[helpstar]

Windows is activated?

Which nvidia drivers did you install?

BIOS resetted by jumper after updating/flashing it?