Dear all,Yesterday I decided to reinstall my whole setup since I experience issues installing Flash and Quicktime on my system.Where I come from :i7 860 @ stock 2.8GhzGTX285 Video card2*2 GB DDR3 MemAsus P7P55D PRO1 velociraptor WD 300GB with Windows 71 Intel SSD X-25M 160GB with FSX aloneUsing FPS limiter, ******* CFG tweak and Nvidia Inspector.I had very good performance and a smooth visual experience in FSX even at ORBX airports. All sliders maxed out except the texture resolution at 7cm and Autogen on Sparse.Now, I have gone through a few changes :- Reinstalled both Windows 7 and FSX on the SSD (I though having the OS on the SSD would help)- updated my BIOS (which version dated from 2009). That gives me now a better menu with auto OC options (which I still don't use yet)I have REX and GEX installed.After a few tests, I am rather disappointed.... I use to maintain my locked 30fps looking at a REX cloudy sky.... Now I get stutters and I am more between 18-25 fps not too stable.... What could have have happened ????An other question :I am planning a new rig with an Asus ENGTX 580, i7 2600K and a second SSD for FSX alone (like before) + a Noctua double Cooling Fan. Since I already have an Intel X25-M 160GB, are newer version and other brands SSD can be mixed with that one on the same system. I guess I should look at the new Intel so that I can use the same Toolbox software ?Thanks for your help,Greg

Anyone ?Thanks

You can use different brands of SSD's in the same system.Regarding your other question, the first thing I suggest you try is to optimize Win7 and FSX for performance. Start with NickN's post on 4/11/10.http://www.simforums.com/forums/topic34141_post198187.html#198187