About 2 weeks ago I bought 2- 8 gig jump drives. I plugged one in the front slot and was immediately asked if I wanted to use that drive as "Ready Boost", I choose yes and was amazed that it smoothed things out. I have since moved it to a rear slot and it still amazes me.
FSX is smoother too with no lags, or hesitations or jumpy pans. Everything is just smoother.
I may be wrong but I think it uses that drive to place swap files and it's faster than the hard drive is/was.
I think I paid all of $6.00 each for them but I would try for maybe 16 or 32 gig drives next month.
Try it, It just may be a benefit to you.
If you are using a SSD or Flash card already this may not work.