Does Mac Pro 2.1 (end 2007) support Samsung SSD 840 Drives ?

Hi Folks, I am looking to upgrade my old Mac Pro 2.1 drives with a new 840 Samsung 256 Gb SSD drives, has anyone experienced this before ?
Meaning : is the upgrade straightforward ? considering the ssd drives holds sata 3 connectors and my old mac pro still has sata 2 ? also do I net to install particular firmware om my mac ? do this firmware exist and if yes where can I find them ?

there sre omly sata vonnevtors, there never is a change, just the supported features and of course backward compatible.
So yes they are fine.
https://discussions.apple.com/thread/4550651?tstart=0

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