DPC latency better with AMD graphic cards (3 card comparison)

Configure and optimize you computer for Audio.
midi_transmission
KVRist
464 posts since 13 Feb, 2013

Post Fri May 15, 2020 3:22 am

which driver and settings do you use for the nvidia?

Eclectus
KVRist
247 posts since 1 Dec, 2013 from Belgium

Re: DPC latency better with AMD graphic cards (3 card comparison)

Post Fri May 15, 2020 7:47 am

midi_transmission wrote:
Fri May 15, 2020 3:22 am
which driver and settings do you use for the nvidia?
442.92 desktop whql Studio Driver, standard settings

User avatar
VladK
KVRer
12 posts since 21 Apr, 2020

Re: DPC latency better with AMD graphic cards (3 card comparison)

Post Fri May 15, 2020 8:07 pm

Probably the most important latency related trick for Nvidia cards is to switch them to low latency mode (and not the ultra one):
Manage 3D Settings/Global Settings/Low Latency Mode -> On.

Eclectus
KVRist
247 posts since 1 Dec, 2013 from Belgium

Re: DPC latency better with AMD graphic cards (3 card comparison)

Post Fri May 15, 2020 8:39 pm

VladK wrote:
Fri May 15, 2020 8:07 pm
Probably the most important latency related trick for Nvidia cards is to switch them to low latency mode (and not the ultra one):
Manage 3D Settings/Global Settings/Low Latency Mode -> On.
NVidia low latency mode is a 3D setting designed to reduce input lag in games. (It used to be called "Maximum Pre-Rendered Frames".) It is very CPU intensive. I don't think it will do anything in 2D mode, and in 3D mode it might introduce stuttering. Doesn't sound like it has anything to do with DPC latency at all!

But just take a look at the screenshots I uploaded. There is almost no DPC latency difference between my RX 590 (198,10 uS) and my RTX 2060 super (202,10 uS). In my previous system I had a GTX 760, and that didn't have DPC latency problems either.

I think what is more important than choice of graphics card, is choosing a stable motherboard with low DPC latency, disabling C-states and disabling Intel speedstep. Before choosing my motherboard I read loads of reviews that specifically tested for DPC latency, and I picked the one with the lowest DPC latency. And it shows!
Eclectus wrote:
Fri May 15, 2020 3:07 am
Sapphire Nitro+ Radeon RX 590
Image

Gigabyte GeForce RTX 2060 Super Gaming OC 3X 8G
Image

User avatar
VladK
KVRer
12 posts since 21 Apr, 2020

Re: DPC latency better with AMD graphic cards (3 card comparison)

Post Sat May 16, 2020 6:41 am

NVidia low latency mode reduced LatencyMon DPC numbers for nvidia driver from around 600 to around 200 for me, and there was no 3D or video on the screen.
I run GT 1030, because all I need is silent card for dedicated audio workstation to play digital piano VI.
It might be CPU intensive as you say, but I have good CPU.

User avatar
Pictus
KVRist
371 posts since 21 Aug, 2017 from Brasil

Re: DPC latency better with AMD graphic cards (3 card comparison)

Post Sat May 23, 2020 8:20 am

UPDATE from my post.

For AMD GPU 5500/5600/5700 series, do not disable.
At least not with the current drivers…
Image

The other stuff is ok to disable.

Return to “Computer Setup and System Configuration”