Is there or is there no limitation on SATA II speed on x200s using SSD?

Question as above. Seems like older thinkpads like T61 have problem reading intel x-25m at 200mbps as advertised... it is capped at 115mbps or something.

x200s users with intel ssd - have any of you run any test to check whether there is a cap to the speed of the ssd?

 

ICH9M is full 3Gbps capable, but some manufacturers lock down the link negotiation to 1.5Gbs to give a slight increase in battery life, or in Lenovo's T61p/T400/T500 case, to provide generalized 1.5Gbps speed across both their primary HDD bay and ultrabay caddy solution. Can confirm if the X200s has such capping by:

1/ Benchmarking a 220MB+/s SSD Intel X25-M/OCZ Vertex/G.Skill Falcon using crystaldiskmark and/or atto to see if get full speed rather than capping around the 140MB/s mark.

2/ Use Everest to do a buffer read test checking the 2.5" HDD interface speed, some having cache reads > 160GB/s so 1.5Gbps mode will cap that aspect of performance to < 140MB/s. Only screenshot I have at hand is ICHxM PATA ATA100/UDMA5 interface capping of 87MB/s shown by Everest buffer read test here.

3/ Check the CAP.ISS value of the ICH9M SATA controller using baredit as outlined here.

I would guestimate that the X200s doesn't have speed capping, but perhaps a X200s reader can confirm with any of the checks above.