Hi,
Since my Dell 10 only has 1 gig of memory. I take the recommend option and not use any memory for caching. Just us a 8 gig usb stick and this is my performance info, and it recognizes 4 gig of the memory stick:
My access speed is: 10.421048MB/s
cache Access Speed: 25.122999MB/s
Ratio is : 2.453167
Obviously, I'm not a performance genus, but these appear to be pretty good responses. Any feed back would be appreciated