WOW, ssd toolbox now works. Just loaded BIOS 0525 and RSTe 188.8.131.525 and to my surprise and very pleased to say, The Intel SSD toolbox 3.0.3 now sees the 520 SSD and enables the SSD optimizer feature, Way to go Intel. Thank you.
Good to hear some good news!! I haven't got that far yet.
There's also 0537, but unless you hit a snag, I'd leave it as-is.
"Let sleeping wolves lie"
OOPS, I was so excited my post is in error, The BIOS that works is 0537, I updated from 0525.
For more complete information about compiler optimizations, see our Optimization Notice.