It's pretty fast usually, just occasionally in LR3 when I tried a little more cloning, etc slows down, and I see the memory use going up.
Win7 64 prof, Intel Quad Q9550, OS on Intel SSD X-25M 160GB, storage on 2 WD Caviar 640GB (blue I think) in RAID0.
I plan to keep this computer for the next 2 years or so as I will be quite busy and probably I won't work that much on it. Plus it actually works pretty well overall. So the easiest would be to add some extra memory, everything else is pretty maxed out. I was thinking I could change a little the timings in the memory as the motherboard is pretty flexible about this things.
Maybe I got the instructions wrong, but I read the manual when I installed the memory sticks and followed their recommendations. I guess the easiest and most certain is to replace the 2 1GB sticks with 2GB sticks for a total of 8GB. Versus spending 300+ and try 16GB (as Newegg has pretty good return policy).