[polim78]

Apple artificially limits the SATA chipset. Today, with the rapid evolution of SSD I plan to add on my macbook pro 4.1 but the problem is that performance will necessarily clamped.
I think not only in this case, and we want an updated firmware soon. This is why we, the concerned, provide feedback on the forum that Apple offers a firmware update soon. Our model is not outdated and is still supported by Apple.
Moreover, with the arrival of the next Mac OS X Lion, this limitation we leave the key.

Come discuss this issue on the Apple support for many to complain about a single post, describe the problems you are having too.
Apple - Support - Discussions - ICH8-M AHCI Macbook Pro 4,1 : Firmware ...
Thanks

[Spheric Harlot]

Originally Posted by polim78 

Apple artificially limits the SATA chipset.

MacRumors Forums - View Single Post - SATA Bus Crippled in MacBook Pro Since 2008

Originally Posted by MacRumors forum member harshw

Yes you are correct. The ICH8-M used has SATA 3.0 Gbit/s capability but is capped at 1.5 Gbit/s. There is a reason for that and it affects other laptops as well - Dell, IBM/Lenovo etc

The ICH8-M was incompatible with many SATA-PATA bridge chipsets at the 3.0 Gbit/s level. Since the SATA-PATA bridges were needed due to optical drives being PATA, you'll see this on many laptops. On Desktop motherboards where a separate chipset was used to provide IDE channels and on laptops that had no PATA optical drives, the chipset can and does provide 3.0 Gbit/s

[mduell]

It hardly matters. While the 200+MBps transfers are great for epeen, where you really notice the difference between SSD and HDD is when you're getting 80MBps instead of 1MBps in random operations.