Without trying to make this into a federal case having to list everthing on my pc if possible.
Has anyone else had these problems? 
I have an AMD FX 8 core 4.0 processor, 8gb of ram, win7 64, sonarx2 64, scarlett 2i2 interface, SSHD and a kickass video card.
My pc has a 7.7 windows score

I have superior drummer running and like 4 amp sims, no fx.  
I've had 30 tracks loaded with vsts before and not a problem.
Everything is fine when I am recording.  
When I playback , it plays for like a minute then I see the first Cpu bar spike for no reason whatsoever. Then it dropsout.
I tried changing Asio to WDM(?), different bit rates.  
Changed my windows pagefile....lol, I don't know why....it's my cpu that is spiking.
Anyway, thanks in advance.

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.

Sound card drivers and how the ASIO driver mode or WDM driver mode is set up controls the amount of CPU used. The lower your ASIO buffer or WDM slider, the more CPU you use.
 
Superior Drummer is a resource hog. That combined with your sound card drivers and their settings is what is causing your dropouts. 
 
To Solve your issue:
1. Raise your sound card drivers (ASIO or WDM) o to see what works best for you and your project.
 
2. Make sure your sound card drivers are up to date with the latest and 'greatest' that your sound card manufacture offers.
 
CJ

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.

So what does your DPC latency look like? Typical and Maximum?

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.

Resolved!
Apparently it was some malware that had to be running as a background service because it wasn't showing up in Task Manager or Process Explorer.

Anyway, I ran SpyHunter and that seemed to fix the spike.
I noticed some bs from Conduit in the scan but not sure which specific file.

Thanks again to everyone!

Eric

"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 thought it was resolved but it is not.
I tried everything that was suggested.
I went back to X1 3-4 days ago and it's running great. 
I loaded up the exact same file with the same plugs running and no problems.
So, I don't have a clue other than it IS something in X2.
Although when installed X1 there were 2-3 "C++redistributable's" that were installed.  
Perhaps that was the problem?  Maybe I will try X2 again at a later date.

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