SATA 6G (SATA III), this latest revision of your SATA storage unit connectors, will increase the bandwidth on the SATA controller from 3 GBit/sec towards 6 GBit/sec. For a regular HDD that is not really very important. But with the tremendous rise of fast SSD drives this really is a large plus. Typically we get 3000 Mbit/s : 8 = 375 MB/sec bandwidth minus overhead, tolerances error-correction and random occurrences.
SATA III is doubling it up, as such we get 6000 Mbit/sec : 8 = 750 MB/sec (again deduct overhead, tolerances error-correction and random occurrences) of available bandwidth for your storage devices. As you can understand, with SSDs getting faster and faster that's just a much warmed and welcomed increase of bandwidth.
Put Sata III in RAID and you'll have even more wicked performance at hand. Most motherboards offer only two ports per controller though, so you are (for now) limited to RAID 0 and RAID 1 (mirror or stripe).
Also there are two controllers currently being used for mainstream, currently the Sandy Bridge P67 platform offers the highest performing solution. Though still fast, any platform using the Marvell 9128 or 9130 will see lower performance scores as the Marvell controllers use a PCI-Express Gen2 x1 lane interface to the system which restricts performance a little. The internal processor in this chipset also limits IOPS by the way.
The one thing SSD and HDD manufacturers are quite horrible at is to show you the real number of GB your drive has AFTER formatting. With 25nm NAND flash memory based products it even gets worse as the SSD will need to reserve a chub of NAND memory for provisioning as well.
Say that you purchase a 120 GB SSD drive, people expect to get 120GB and not 115 GB, you can dwell down into the "Windows uses Binary capacity measurements 1024MiB = 1GiB" discussion, but it remains somewhat shady advertising. With 25nm NAND flash memory some more then usual NAND FLASH will be hogged up by the SSD for redundancy and compression and is over-provisioning a few additional GB.
The end result for our 240 GB SSD is 223 GB after the NTSF format. We lost 8% = 17 GB (!) right there without the drive even being used for storage, and that simply blows.
OCZ Agility 3 SSD review OCZ is about to inject an SSD into the market that is labeled Agility 3 SSD. What's the difference in-between Agility 2 and now 3 you might ask ? Well, two primary things really, controller and NAND flash memory type. Labeled with advertised speeds of of 525 MB/sec with write speeds of 500 MB/sec this product should be really interesting for many of you.
OCZ Agility EX SSD 60GB review Today we test the OCZ Agility EX SSD. If 100% reliability is your thing then this is the cheapest SLC based SSD with an Indilinx controller that you can think of. The OCZ Agility EX offers top notch performance and reliability, we honestly believe in the theory that the SSD could probably outlive you.
OCZ Agility SSD 120GB review The OCZ Agility series SSD is an accumulation of all the latest breakthroughs in SSD technology, including controller design, spiffy read/write speeds, and 64MB of onboard cache, yet with this series, at a somewhat better price. See, by doing so OCZ shaves another 20 to 25% off the sales price.