Across all airports, international/large, the frames in the PMDG 737NGX VC drop to around 2-8. Outside view they increase to about 15-20 testing at FSdreamteam KLAX. Recently, I have found this out to be at all airports when I am on the ground. During takeoff the FPS drops to about 2-3 and landing about 5-8 even in clear skies. During cruise I have locked 30FPS and frames set to unlimited and controlled by Nvidia Inspector. It is not a hardware issue or a sliders issue I have found while testing. 

To start off you need to have your name signed in your signature (look at mine)
 

2nd what are your system specs?
My specs are in my signature and I can get up to 18 FPS with the 777 on the ground at Flightbeam SFO and I've heard the 737 is a little less FPS than the 777 so I would guess I would get 12 FPS with the 737 if I had it but with default scenery I get 25 FPS with the 777 so I would guess 20 if I had the 737.

Specs are I7 [email protected] 

 

8GB ram

 

Windows 8.1 

 

and it does not give me the edit option for my post. 

You have to go within the my settings page.
Based on those specs you should be fine, don't know why then you're getting poor performance.

This is not of God!! Kick which is voodoo!

Odd I get 20 fps in the NGX VC at fsdt KLAX and I'm running an AMD processor which fsx don't like what tweak s are you using?

How do your other planes work? If they have a similar problem, then it is FSX based. If they do not then it NGX based, and I would submit a support ticket.

Alright the problem was fixed. It happened to be my buffer pools and I used Word Not Allowed's tweaking guide before and looked at some other things later on. I currently use Poolsize=0 and I did not remove the Reject Threshold. Removing that fixed the problem.