Cubase 6.5 CPU overload on plugins

I am having CPU overload on some plugins! Guitar Rig 5 uses 50% CPU on one track! This also applies to Ampeg SVX! Why! I aslo tried it on Windows XP and it is the same! Seems like it is a hardware issue! Please help me out!

Windows 7
Graphicscard: Saphire HD 5450 512mb DDR3 PCI-E HDMI/DV-I/VGA
Moherboard: ASUS M5A97
CPU: AMD 3.6ghz 8 core
Ram: 16gb
Soundcard: Steinberg CI2
Software: Cubase 6.5

You are running Windows 7 64bit I assume?
And the 64bit version of Guitar Rig Pro 5?
Using it for guitar as an insert?

My PC is less powerful than yours and I don’t have that problem.

yes it is very mystical! :slight_smile: Must be some kind of hardware issue!

windows 7 64 bit

Problem on both 64 bit and 32 bit Cubase! I have also tried it on Windows 7 32 bit, but still the same problem! Very strange because my East West Platinum Orchestra works just fine!

Have you checked if you are running the latest versions of those plugins?
Does it happen in every project you use these plugins?