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Feature Suggestion: Disable HDCP

hans_glans

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Timecard found some improvements with disabling HDCP like this (scroll down and click Findings and Analysis):


I use the tool on a regular basis and the msi mode feature was already a time saver!
Would you consider adding this to the tweak section too?
 

W1zzard

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note to self

Code:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0002]
"RMHdcpKeyglobZero"=dword:00000001

improvements
Which improvements?
 

hans_glans

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Many users reported improved "responsiveness" and I measured this myself:
In depth measuring would require more testers and tests with xperf. Maybe something you can catalyse by adding it as an experimental feature.

Another users report:
1623187972421.png


This does not have to be universal:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0002
For me it's
[...]\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
for example
 
Last edited:

W1zzard

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Does this build achieve what you need?
 

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hans_glans

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Yes, works for me! Did you account for possibly different regkeys for other users?
 

poppe

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Maybe it's a known issue but this feature doesn't seem to work with the DCH drivers. At least NVCP still said my computer was HDCP-capable, now I'm on the standard driver and it works fine.
 

W1zzard

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How interesting, I wasn't aware of that. Strange that there's a difference between DCH and non-DCH
 

usama sattar

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For me, I installed the latest version of DCH driver using NVCleanstall-1.12.0 and HDCP has been disabled.
GPU: Gtx 960
OS: Windows 11 22000.318


HDCP disable.png
 

hans_glans

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Yep, it worked as expected for me in the past too with the DCH drivers.
 
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Nice tip.

The thing that frustrates me more is that Geforce 7900 GS picture in settings... what's more frustrating, that I remember it still or the fact it control panel is a slow legacy mess.
 
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Benchmark Scores Benchmarks in 2022?
Many users reported improved "responsiveness" and I measured this myself:

How is anyone getting these insanely low numbers? Never seen this kind of numbers on any PC I have had.

Right now current latency is jumping from 20 to 80, and I am always getting crazy DPC spikes from the NVIDIA driver (even above 2000).
 

hans_glans

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Is your PC strictly for gaming?

I do use a lot of these tweaks, but there are many things that I cannot change or disable, because they are needed for various stuff.

When I decide to upgrade, I will probably build a second PC just for gaming, and convert the current one to an HTPC for everything else.
 

hans_glans

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I multiboot differently configured versions of Windows for different purposes.
My 1709 install manages to be effective for gaming and productivity though.
Nvidia driver also plays a massive role, with 441.41 and 456.71 having lower latency than most recent driver versions.
 
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