Hi, I'm shopping for PC parts and the MOBO I'm looking at only has 2 SATA 6.0Gb/s ports, but 4 additional SATA 3.0Gb/s ports. My problem with that is because I plan to run an SSD (obviously connected to a 6.0 port) and 2 HDD's. I want maximum performance out of both HDD's since one will hold games and other non-boot programs and the other will be recording large amounts of data, but I'd only have one extra 6.0 port.
So my question is, do conventional HDD's advertised as 6.0Gb/s actually transfer data that fast? Or would I get the same performance connecting one to a SATA II port?
I'd hate to spend the extra $50 on a MOBO with 4 SATA III ports if that isn't going to be the choke-point.
EDIT: I had done some searching before I posted but the results were either too old or too subjective to address my concerns. However, some additional research has lead me to a preliminary conclusion.
According to WD, both 6.0Gb.s and 3.0Gb/s Caviar Black models transfer data from the platter at a maximum speed of 138MB/s (126 MB/s for models 1 TB or less). The full speed of the SATA ports only factor into accessing the HDD's cache. In light of this I'm now planning to get a "6.0Gb/s" Black with 64MB cache for the games and programs, and run 2 cheaper "3.0Gb/s" HDD's in RAID 0 for recording.