Hi Sanal.

Here are the ones I changed in the fsx.cfg :

[GRAPHICS]
HIGHMEMFIX=1

[BUFFERPOOLS]
Poolsize=250000000

With the bufferpools, you need to try different numbers to see what suits your graphics card. I have an Nvidia 1280MB (1.280GB GDDR5) GTX470 and have found that it is very happy with the 250000000 (250MB) setting. You might need to try different number a bit to find the number that suits your graphics card the best.

My previous graphics card, an Nvidia 1GB (GDDR3) 9800GTX+ was happy with 200000000 (200MB). Because I saw a forum topic (one of the Avsim forums) about this, and within it,  a post that said a lot of people were finding that 200000000 was the number that seemed to suit their graphics card (it worked great for me).

You will have a [GRAPHICS] segment. But you will probably need to add the [BUFFERPOOLS], just add it at the bottom of the fsx.cfg

Back up your fsx.cfg before making changes! ;)

Mark