I have a gtx 470 2gb and have the opportunuty to buy gtx 570 2.5 gb or gtx 670 2 gb.

What I would like to know what advantages it will give me in FSX and can an upgrade handle

my excisting hardware?

I know at the end of the year new features will come out in relation to new mobo and processors.

But before I start in a new configuration I would like to take the opportunity to replace

my gtx 470 2.0 gb in the one I mentioned.

Could someone give me an expanation what I can expect from an upgrade to gtx 570 or 670?

my system runs very fine but a.s.a I fly in heavy weather or connect to a third server for MP than my system run into trouble.

So I hope to get rid of it with the upgrade.

What is the opinion from a tech point of view.

I have mobo X58 processor I-7 920 overclocked to 4.2. gz.

harddisk from western 1 terda and 1500 PCI and noctua 14 cooler

An upgrade to a new GPU will make nearly zero difference in your scenario.

 

I would personally recommend at you save your money and go for a SB or IB setup.