Hi Michaelvg1, First, remember that the flash mem is not taking the place of Ram. I wouldn't spend more on Flash mem when you can add ram. Course, that's without knowing how old your PC/hardware is. But it must be pretty new to run Vista. When I first tried Ready boost with 2 g od DDR2/800, I tried a 2g PNY flash drive. Like yours, it wasn't fast enough and said so. So I popped in my 1 G Lexar and Voila ! But seeing the increase, I ordered 2 additional g Ram and it made a nice improvement. So Ram is still the 3rd best upgrade, video card/processor being the first two. But then you have to figure out the best settings for video card/FS to see improvement. That's where it is hardest !!! Good Luck, rob