The OP mentioned that even True Pianos loads slowly.
This might be a tip-off that one of the drives is operating in PIO mode (which would absolutely kill performance).
 
If you're going to spend that kind of money on a machine:
You want your sample libraries on SSD.  They'll load *far* faster... and you'll achieve 3 times the polyphony.
 
The GTX-980Ti and 128GB RAM aren't buying any additional performance.
 
Running 128GB RAM, some apps currently have problems.
We have a client who was having issues with VE Pro and Kontakt... where Kontakt wasn't releasing RAM when samples were removed from the project.  The system would become "RAM starved" and start hitting the VM swapfile (which killed performance).  His solution was to run two separate machines... each with 64GB RAM (while the issues are worked out).  This composer pulls 4000 stereo voices (not a typo) of disk-streaming polyphony from a single machine.

Many great tips thanks a lot friends ......... I am trying all the suggestions 
Hop to find solution
 
Regards
Solvaij 

As others have said, your sample libraries need to be on SSD to load them faster.
 
When I switched from spinning disks to SSDs the load time for my instances of Vienna Symphonic Library went from minutes to seconds.  I can load my entire orchestra preset in about 20 seconds now (I haven't timed it though, that's just a guess).
 
That said, I never encountered a problem where it took "minutes" for True Pianos to load.

SimpleM
Just did a few loading tests on my system.

Twin 2.27 Ghz Xenon processors
18gb ram
6970 Ati Vid card 2gb ram
120 Gb SSD OS drive
500GB Data SATA
500GB Sample SATA

True Pianos 1/2 second load
Rapture pro, instant load, instant patch change
Addictive Drums 2, 5 second to insert, instant patch change.

You have some problem other than Memory.  The old 24gb was more than enough.
 
 
 

 
Hey SimpleM,
 
remember this post:
http://forum.cakewalk.com/FindPost/3323096
 
So I assume you solved your problem...... What did the trick?

M@

 
Hey SimpleM,
 
remember this post:
http://forum.cakewalk.com/FindPost/3323096
 
So I assume you solved your problem...... What did the trick?



Actually I just learned to live with it but found a new problem, sound degradation in Rapture Pro when playing back Dim Pro samples.

Did a reinstall with OS on SSD and both issues took care of themselves.  Now, for some reason all my extra libraries are gone from Rapture Pro's interface.  All show installed in CCC and I sent them all down the same exact path as I did the stock Rapture Pro libraries.

I am just destined not to play well with that Synth.

Ah, there's a weird thing with how you add sample libraries to Rapture, and I've completely forgotten what it is. Perhaps someone will chime in. As I recall, there's a really un-intuitive extra step you have to do to get it to register the extra sounds.