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  1. #1
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    Question Above 4G decoding - floaty mouse

    My specs:
    i5 9600kf
    G.skill trident z 3200mhz cl 16, 2x8GB
    GeForce RTX™ 3070 VENTUS 3X OC - 8GB Vram
    ASUS Z390-i gaming
    RM650x

    I activated Above 4G decoding in BIOS, after I read it helped with performance. However: my mouse input lag improved when moving from place A to place B - like across a screen! But when doing small adjustments, mouse feels floaty and overall laggy.

    This option is meant for GPUs with more VRAM and for resizeable bar. I don't know exactly from how much GB you should turn this on. It is interesting option. But input lag is bad now!

    GPU is enabled in msi by default and I have it in pci-e gen3, I have on IOAPIC 24-119 entries.

    Any idea why Above 4G decoding cause weird lag?

  2. #2
    ROG Enthusiast Array howxcore PC Specs
    howxcore PC Specs
    MotherboardMaxims XI Hero- Wifi
    ProcessorCore I9 9900k 5.0 ghz
    Memory (part number)G.skill tridentz rgb 3600mhz 32gb
    Graphics Card #1rtx 3090 ftw3 ultra
    Sound CardSound Blaster X AE-5
    MonitorViewsonic XG270QG, BENQ PD3200U
    Storage #1970 evo m.2 1tb
    Storage #2Sandisk Ultra 3D SSD 2TB
    CPU Coolernzxt kraken x62
    Casenzxt 700i
    Power Supplyseasonic titanium 1000w
    Keyboard logitech g915 TKL
    Mouse logitech g502
    Headset Logitech G935 wireless
    Mouse Pad ICEMAT
    Headset/Speakers logitech z5500
    OS windows 10 pro 2004

    Join Date
    Nov 2018
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    Quote Originally Posted by empleat View Post
    My specs:
    i5 9600kf
    G.skill trident z 3200mhz cl 16, 2x8GB
    GeForce RTXâ„¢ 3070 VENTUS 3X OC - 8GB Vram
    ASUS Z390-i gaming
    RM650x

    I activated Above 4G decoding in BIOS, after I read it helped with performance. However: my mouse input lag improved when moving from place A to place B - like across a screen! But when doing small adjustments, mouse feels floaty and overall laggy.

    This option is meant for GPUs with more VRAM and for resizeable bar. I don't know exactly from how much GB you should turn this on. It is interesting option. But input lag is bad now!

    GPU is enabled in msi by default and I have it in pci-e gen3, I have on IOAPIC 24-119 entries.

    Any idea why Above 4G decoding cause weird lag?
    If you disable Above 4G decoding, does it go away?

  3. #3
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    Quote Originally Posted by howxcore View Post
    If you disable Above 4G decoding, does it go away?
    Yep!

  4. #4
    ROG Enthusiast Array howxcore PC Specs
    howxcore PC Specs
    MotherboardMaxims XI Hero- Wifi
    ProcessorCore I9 9900k 5.0 ghz
    Memory (part number)G.skill tridentz rgb 3600mhz 32gb
    Graphics Card #1rtx 3090 ftw3 ultra
    Sound CardSound Blaster X AE-5
    MonitorViewsonic XG270QG, BENQ PD3200U
    Storage #1970 evo m.2 1tb
    Storage #2Sandisk Ultra 3D SSD 2TB
    CPU Coolernzxt kraken x62
    Casenzxt 700i
    Power Supplyseasonic titanium 1000w
    Keyboard logitech g915 TKL
    Mouse logitech g502
    Headset Logitech G935 wireless
    Mouse Pad ICEMAT
    Headset/Speakers logitech z5500
    OS windows 10 pro 2004

    Join Date
    Nov 2018
    Reputation
    10
    Posts
    64

    Quote Originally Posted by empleat View Post
    Yep!
    i'd just keep that off until a proper bios update that enables resize bar support officially

  5. #5
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    Quote Originally Posted by howxcore View Post
    i'd just keep that off until a proper bios update that enables resize bar support officially
    I don't even have CPU which supports resizable bar, but it also should be enabled for GPUs with large VRAM. Mine 8GB. No idea, if I should enable it. It can be combination of things. I would like to know more, but didn't find much about it.

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