Input lag in new system (Windows 8.1)

Slythas

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Jun 26, 2015
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I recently upgraded my entire gaming rig and am happy with the results, except that in some games I get very slight but still noticeable input lag. It's most noticeable in GTA V and WoW, and especially in WoW is it annoying. I also feel like the mouse cursor isn't as responsive while in Windows, compared to my old system.

I've read about the major input lag problems that came with 8.1, but that should be fixed by an official Microsoft patch that should already be in place in my system (tried downloading the fix but it said it wasn't applicable in my system).

Looking through this guide he/she mentions that higher RAM latency could be the cause. My RAM is 2400Mhz at CL11. Can that cause any problems?

Is there any new software settings in Win 8.1 that I should disable? Is there anything in the BIOS/UEFI I should disable/enable?

My system consists of:

MOBO: ASUS Z97-A - https://www.asus.com/Motherboards/Z97A/
GPU: ASUS Strix GTX 970 4GB - https://www.asus.com/us/Graphics_Cards/STRIXGTX970DC2OC4GD5/specifications/
CPU: i7 4790K @ 4.0GHz - http://ark.intel.com/products/80807/Intel-Core-i7-4790K-Processor-8M-Cache-up-to-4_40-GHz
RAM: Corsair Vengeance Pro 2400Mhz CL11 - http://www.corsair.com/en-us/vengeance-pro-series-16gb-2-x-8gb-ddr3-dram-2400mhz-c10-memory-kit-cmy16gx3m2a2400c10r

And, before anyone asks, yes I have disabled V-Sync, I always do because it always gives me severe input lag. :)

Appreciate all the help I can get!
 
Solution
Well I'm no expert at this, and I'll freely admit this, so if I'm wrong someone correct me for all of our sakes. It sounds like your computer isn't the problem, but what is causing you problems is your monitor. Check the display lag (in ms) on your monitor. If it is greater than ten, you might want to upgrade to something better.
Ill post a link to a youtube(s) video that describes display lag/input lag
https://www.youtube.com/watch?v=eZRb1OEcghs
https://www.youtube.com/watch?v=fLf72xDdwu0
And a website that has the lag times for quite a few monitors
http://www.displaylag.com/display-database/

megalizardfish

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Jun 19, 2014
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Well I'm no expert at this, and I'll freely admit this, so if I'm wrong someone correct me for all of our sakes. It sounds like your computer isn't the problem, but what is causing you problems is your monitor. Check the display lag (in ms) on your monitor. If it is greater than ten, you might want to upgrade to something better.
Ill post a link to a youtube(s) video that describes display lag/input lag
https://www.youtube.com/watch?v=eZRb1OEcghs
https://www.youtube.com/watch?v=fLf72xDdwu0
And a website that has the lag times for quite a few monitors
http://www.displaylag.com/display-database/
 
Solution

Slythas

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Jun 26, 2015
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Hey, thank you for replying!

I've long suspected that the monitor could indeed be the cause of my input lag, but I don't understand why it worked well with my older system on the same monitor. Could a newer system demand a better monitor or something?
 

Slythas

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Jun 26, 2015
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I tried a friend's monitor with a 2ms delay. Same input lag. I think it's safe to say it's not the monitor, but either Win 8.1 itself or some drivers that's the issue. I remember also reading that the motherboard itself, the ASUS Z97-A, can cause the input lag.

i'm thinking I should switch out some parts again. If I can't find anything software related that causes this, I'll have no choice I guess. :(