While mixing I am running into a situation where my vst performance meter is maxing out, however, when I go to the windows monitor It shows I am only using 19% of my cpu. Any help would be appreciated.



system, version, Sound card, etc … ?


Operating System
MS Windows 7 64-bit SP1
Intel Xeon E5640 @ 2.67GHz 58 °C
Westmere-EP 32nm Technology
Intel Xeon E5640 @ 2.67GHz 62 °C
Westmere-EP 32nm Technology
24.0GB Triple-Channel DDR3 @ 666MHz 9-9-9-24
ASUSTeK Computer INC. Z8NA-D6© (CPU 1)
LC-42LB261U @ 1842x1036
NVIDIA GeForce GT 630
Hard Drives
2930.27GB Seagate ST3000DM001-9YN166 ATA Device (IDE) 28 °C
468.85GB Seagate ST480HM000-1G5162 ATA Device (IDE) 36 °C
1465.14GB Western Digital WDC WD1501FASS-00W2B0 ATA Device (IDE) 31 °C
586.06GB Western Digital WDC WD6000HLHX-01JJPV0 ATA Device (IDE) 38 °C
Optical Drives
ATAPI iHAS224 B ATA Device

Running Nuendo version 5.5.6.

Thanks Fredo!!

Raise the buffer size on your audio card.
The Performance meter shows a combination of CPU, Disc access, ASIO buffer, etc …


Can be bad programmed plugins as well… look at Slate FG-X Mastering processor… a real CPU hog… Asio Meter jumps 30% when loading that plugin - windows tells somewhat about 2 % … I am sure this can be done better.

Just create a project with only Nuendo plugins… ad plugins till you have reached a reasonable Asio load… assuming you are not on 32 samples buffer or something (try 512 or even 1024 for this experiment) you might have a similiar CPU usage in the taskmanager…

for some reasons I had projects with high CPU (asio meter) load which are “smaller” then other projects which are using less CPU… This is just a cryptic thing :slight_smile:

Sometimes a plugin for example only used one Core… lets say you max our Core1… have Core 2-8 more or less unused… this will already result in crackle / drop outs… in a perfect world the load would be spreaded nicely across all cores… well… in a perfect world :slight_smile:

Thats why I have the feeling that it makes more sence to have “less cores but with more GHZ” when choosing a CPU - instead of wasting 2000 bucks for a 16 core thing… which will give you exakt the same performance like a 4 core when maxing out one core… well I am not a computer expert but that’s the feeling I have :wink:

The newer the Nuendo Version the better the Core/CPU handling… Nuendo 5.5 was an awesome release… but currently using Cubase 8 I can tell you that here you will have a better handling of the ressources which will/might/can result in “less asio meter load” … CPU usage in Task manager should be similar…