heard that nvidia optimus adds extra latency

[derekchan]

1060maxq with optimus
Does it mean that the dedicated nvidia gpu needs to go through the Intel display chip before it can be output to the HDMI port?
Is this latency perceptible?

 

Can I avoid this delay?

[Levent]

1 minute ago, derekchan said:

Does it mean that the dedicated nvidia gpu needs to go through the Intel display chip before it can be output to the HDMI port?

Yes

1 minute ago, derekchan said:

Is this latency perceptible?

Couple of miliseconds at best, probably not.

1 minute ago, derekchan said:

Can I avoid this delay?

No, you cant.

[Agall]

2 hours ago, derekchan said:

1060maxq with optimus
Does it mean that the dedicated nvidia gpu needs to go through the Intel display chip before it can be output to the HDMI port?
Is this latency perceptible?

 

Can I avoid this delay?

The HDMI port isn't always wired to the dGPU in a gaming laptop. If you plug it in and go to Nvidia Control Panel's PhysX section, it'll show where outputs are wired to.

 

Optimus does have a latency and performance overhead, small, but it does exist. The vast majority of gaming laptops in the last decade have it though.

 

[porina]

7 hours ago, derekchan said:

Is this latency perceptible?

Example: assuming you're sending one 1080p SDR frame over PCIe 3.0 x16 which apparently that GPU supports. That frame would take 0.4ms to transfer. There may be a little encoding/decoding going on either end too. If you're running higher resolution it'll take correspondingly longer. I'm assuming there is no data compression going on which could affect it.

 

7 hours ago, derekchan said:

Can I avoid this delay?

Buy a better laptop next time. Higher end models have an output switch. This means it can direct the output ports to whichever GPU is active at the time. It also enables you to totally disable the iGPU so it can't interfere or cause problems when Windows chooses to do something stupid.