I didn't have this issue before, but now the CPU gets to 95 degrees C during playback... Pushing 200 F.....As soon as I close Sonar it cools down. Just in the time to type this, it has cooled down 10 degrees.... Streaming warms it uip a bit, but not like this. I ordered a new CPU fan(Arctic brand so......sounds cold to me) and it should get here tomorrow. Then I should be fine. 2000-2800 RPM seems slow to me...

Any substantial application will cause your CPU to overheat under the current circumstances.
 
Idle temp around 85 degrees C is way too high
Ideally, you don't want to see temps too far above 75 degrees C when under heavy load.

Most modern CPUs have a temperature sensor which protects from extreme heat.
 
The Sandy Bridge Core i7-2700K that I use trips in around 75C. At that point it will gate the CPU clock, effectively slowing things down.
 
All that being said, I often use extremely high CPU tools, like some custom Reaktor things, and I rarely see anything above 60C.

So methinks the current cpu fan is on it's way out. It sits around 75 idling..

OY! It should idle near room temperature, perhaps a tad warmer.
Or maybe the sensor data is reporting things erroneously.
 
If it is really at 75C you should be able to feel the heat by putting your hand near the cpu.
And the fans should be at full throttle all the time.
 
I can tell roughly what is happening on my system just from the sound of the fans.
 
When I build systems, I don't even put on the fan until later. You don't need a fan if the system is just sitting there, truly idling.
 
The most stressful thing I've tried (without resorting to benchmarks) is to set Acronis full backup to use maximum compression - that gets all cores pumping full bore for a long time. Then I might see 60-70C.
 
Another simple test is to use the 7-zip 'benchmark' feature.
 

Realtemp shows my i7 3770 cores "idling" at 27 to 33 C.   Its rare that I get above lower 40's.
 
I'm using a Thermatake Water 3.0 liquid cooling system for the CPU.  

I upgraded mb, and got a 4690 chip. It's running at 37 degrees at boot. I'll keep an eye out tomorrow when I launch Sonar. Still optimizing the new hardware atm.........finished sooner than I thought.......It runs around 37 with Sonar doing it's thing. Mark this one SOLVED...by a new mb........It may have been the cpu fan, but I can't afford to be down. Not that I'm making any money, but still.......

I tried this morning with the case all buttoned up and my core temp never got above 138 degrees F...........this is with the stock intel fan. I have an Acrtic  but it looks complicated to install.

I've never used an aftermarket fan on my CPU. The Intel fan has always done the job well enough. One thing I will say is that the problem could be thermal paste based. The paste that will come on the bottom of the stock cooler is typically crap. Better to take it off and put something like Arctic Silver on

TerraSin
I've never used an aftermarket fan on my CPU. The Intel fan has always done the job well enough. One thing I will say is that the problem could be thermal paste based. The paste that will come on the bottom of the stock cooler is typically crap. Better to take it off and put something like Arctic Silver on

FWIW, Quality thermal paste might net you several degrees difference.
75 degrees C when idle is 40+ degrees hotter than it should be with quality cooling.
No thermal paste would have kept the OP's CPU from overheating.  
There had to be a problem with the way the heatsink was seated... or with the fan.