general questions about my system

rimartic

Honorable
Sep 5, 2012
75
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10,640
Hi
My system is:
1~ main : msi 990fx-a GD80
2~ cpu : 8350 fx-4Ghz
3~ cpu cooler : zalman cnps performa with two 120mm fan's
4~ psu : 750w-xfx black edition 80+silver
5~ vga : 2×R9-270x (crossfire)
6~ ram : 8 gig dual (4×2gig-1333 cl-9-9-9-24)
7~ hdd : 1tb-hitachi +1tb-wd caviar green+80gig maxtor
8~ 3×dvd-rw
And now the question's:
A ~ is it possible because of amazing abilities of this mainboard , there be a chance to upgrade pci-e 2.1 into 3.0 with
upgrading the bois in future ?
B ~according to price and cost does it worth to change current rams to 4 kit of dual 1866 or 2033 -4gig rams =16gig ?
C ~according to all hardwares of my system and specification of system psu does my psu has enough power for all kind of usages especially gaming ?
D ~because of general system heating is it better to keep the side door of case always open.
What if i put a stand cooling fan in front of it during gaming?
E ~ is there any software to show fps during game?