How's it going Tinker
Well there's the thing........you would expect the 9128 chip to perform consistently ... but it don't! ..... I have the chip in my board (GA-X58A-UD3R v2) and it sucks......but I have not 1 but 2 integrated onto the Highpoint 640 PCI-E card and it performs like a gem
4 Samsung Spinpoints HD502HJs in raid 0 and get 540Mb/s read and 525 write ... tell me how that work.
One thing I have read is,.... ideally....as it has 4 ports with two Marvell controller chips....Ive been told the best performance is gained by allocating a single drive per controller........I think the 620 has only one..... so research well if you get the 620
The Manhattan I have no experience with, but at less then a quarter of the price......maybe you get what you pay for..... It always worries me when I can't find a review of a product anywhere on the net, ... including Amazon......lots of good report about current SanForce controllers.......but again there not cheap either.
A lot of people are looking in the wrong area when comparing SATA2 and SATA3 performance.......if you're still using spinning plattered drives, the performance increase is not that big .... a ballpark figure for a single drive would be going from an average 65/70Mb/s to 100/110Mb/s tops for SATA3.....SSDs and raid is where the performance resides with SATA3.
Aussie Allan