Quote Originally Posted by jalyst View Post
Actually I'm wanting to compare a SSDNow V G2 64GB, & OCZ Vertex (or Adata) 30 or 60GB*, to the Black & F3.
The X25-V's are being considered for my OS/boot volume, not my scratch-disk.
I don't have first-hand experience with the SSDNow V G2 or the OCZ Vertex, but from what I've heard the published specs can be quite different from achievable performance. You might look on a review site like AnandTech, perpc or LegitReviews to see what they've measured.

Quote Originally Posted by jalyst View Post
No this is for a scratch-disk (I outlined my workflow earlier), not an OS/boot volume.
I'm considering a 2nd X25V for my OS/boot volume.
For a write-heavy scratch disk, you might also consider a SAS 6.0 15K rpm HDD such as the Seagate Cheetah 15K.7 instead of an SSD--particularly if your writes are mostly sequential. The 15K.7 has a 200 MB/s seq write rate, and doesn't wear out when it's written heavily.

Quote Originally Posted by jalyst View Post
I wonder what sort of sustained/seq performance boost I'd be getting if I short-stroked it to 500GB?
Judging by that graph it'd be approx. 70MBps...
No, that's 70 MB/s for a drive with an 82 MB/s max -- the equivalent on the WD Black would be about 96 MB/s at the 50% capacity point. From Anvil's post, it looks like the F3 is faster; not surprising, given that it has those ultra-dense platters.