ASUS announce full P55 series SATA6G support with SATA6G expansion card

[saaya]

I'll be waiting for native SATA 600mbps support, or better yet, 600mbps RAID cards and SSD's that support it.

i asked around at computex, the big raid card guys all expect it to show up in early 2010 or even mid 2010 only, and they target a 300$+ price range :/

DMI has 1 GigaByte of bandwidth in each direction (2 GigaByte agregate bandwidth). It is enough for 2 SATA 6 devices (500MB each). Mouse, webcam together rarely uses more the 2 MegaByte of bandwidth. Other disk devices (USB disk, SATA 3 e.t.c) also uses DMI but the situation when CPU reads sequential data from 3 devices simultaneously (from two SATA 6 + one SATA 3/USB disk) is hardly imaginable. In the case of copy (through CPU) from one disk to another, 2 GigaByte of agregate bandwidth is enough to copy from 2 SATA 6 disks to another 2 SATA 6 disks at full speed.

what? how can you claim dmi is fine? what kind of an engineer are you? :P

In the case of copy (through CPU) from one disk to another, 2 GigaByte of agregate bandwidth is enough to copy from 2 SATA 6 disks to another 2 SATA 6 disks at full speed.

its 1GB/s in each direction = 1000MB/s, thats the theoretical max!
the theoretical max for sata3 is 600MB/s... PER CHANNEL, ie, PER DEVICE...
if you use 2 SSDs that can saturate the sata3 bus, dmi is limiting... and thats with dmi using for the ssds only and nothing else...

thats unlikely to happen for a normal oc these days, but there are people who do use that fast ssds... and its only a matter of time until ssds become mainstream and hdds and ssds saturate the 600MB/s sata3 at least in burst...

whats sata3 and usb3 all about? more bandwidth... then why would you connect them to a bottleneck bus that works ok now but will cr4p out as soon as those new interfaces are actually fully used?

and thats just bandwidth, how about latency and steadiness?
what if im using my gbit nic with a high dpi high refresh rate gaming mouse while copying from one ssd to another in the background?
id be very surprised if dmi isnt limiting at all in such a situation...