What I have noticed with Carenado's SR22 is that the initial frame rates are very good.  However with about 3-5 minutes into its use, the frame rates drop to single digits and the aircraft is unusable.  When I switch to a different aircraft in the menu, the frame rates shoot up. 

 

I am using LM Prepar3d V2.1 but had the same issues with FSX.  My system should be able to handle the load so I suspect that this product, Carenado SR22, has a major flaw.   

 

My system:

 

i7 4820K @ 3.7 OC to 4.4

16 GB RAM

Win 8.1

1 TB SSD

 

 

I have a smaller processor, the same ram but a regular drive and don't notice this at all or have problems with the b1900d either in FSX. It runs smooth.