Makes a big difference, much quicker and launches apps like butter. These are on sale for 109 @ Fry's if anyone is looking. Samsung Spinpoint 750 gb - 32 MB buffer. Also the new 32MB buffer Maxtor 750 gb are also on sale for only 99 bucks. Only difference is that the samsung is 8.9 seektime and the maxtor is 9.3. Both should work great!