X2 CPU Spikes

In Windows, create a "maximum power" power plan by going to the Control Panel and selecting Power Options. Pick a plan, click on Change Plan Settings, then click on Change Advanced Power Settings. Expand the Processor Power Management section, and set both the minimum and maximum processor states to 100%. While setting it to maximum is important, having the same value is also important.
 
Next, open Device Manager from the Control Panel, expand the various trees, and disable (not uninstall!) any devices you don’t need. Start with internal wi-fi if you have it, which can have a major negative impact on performance. But you also don’t need any onboard camera, internal sound card, Ethernet port (except in rare instances), and the like.
 
Again while in the Control Panel, click on System then click on Advanced System Settings. Click the Advanced tab and under Performance, click on Settings. Under Visual Effects, select Adjust for Best Performance. This basically turns off all the eye candy.
 
Now click on Start and in the Search box, type msconfig and open msconfig.exe. Click on the Startup tab, and uncheck any frivolous startup programs (do you really need Adobe updater to check for updates to Acrobat?). This frees up memory and distractions to your CPU. And as you’ve already disabled the wi-fi and won’t be checking your email, turn off any anti-virus programs so they don't scan.
 
Finally, download the free DPC latency checker utility from http://www.thesycon.de/deu/latency_check.shtml. This monitors your computer’s real-time performance and displays when CPU spikes occur that reduce performance, or worse yet, can cause audio dropouts.

Thanks guys.

Anderton - Good advice, I do or have done most of the things you suggested.  
I tried all the other things you suggested as well. Removing unnecessary devices and what not.  
My power config was already  set as you suggested.  
I don't run Anti virus on my machine or any other progs that hog resources.
I'm actually very conscious about keeping things off my pc, and turning off services that I don't
absolutely need, which makes this all the more frustrating.

Cjay - It may be the driver.  Focusrite has their own Asio driver of which I have the latest release 2.4.
When I play the song I am steadily using roughly 10% of cpu, and not even 1 Gb of memory.  
Sometimes it plays for 2 minutes, sometimes a minute, then it spikes.

I will continue to look.  Thanks again for the suggestions.

Thanks man,
Idle - Current 200 Max 259
Song playing - Current 360 Max 400
Then after 60 to 90 seconds it spikes to about 3500.

It's definitely coming from within X2.  I am watching all my processes when it spikes.
I never had a problem before but I am eliminating Amp sims 1 at a time now.
But I still think it's a driver issue. 
In the performance window in X2 you can see 8 bars for each of my processor cores.
They are all being used very little and its only the first core that is spiking. Don't know if that matters.

"Expand the Processor Power Management section, and set both the minimum and maximum processor states to 100%." the only options i get there is the system cooling policy

I had the same issue - worked fine in X1, same project in X2 was spike city. Tried everything and eventually gave up.

Okay, I thought I had this solved before and it was not.  Hopefully this time it is!

Even though I had run numerous benchmarks on every piece of hardware in my tower.
There was nothing to extreme on the CPU temp, but thought it still may be an issue.
Cleaned everything up and put a better fan on my CPU.  It helped but I soon noticed the spiking again.
I swear I have already been through every option in Sonar at least a dozen times.  
I turned off Read and Write Caching and the problem seems to be gone.