Just got the subject 2.5" SATA drive to extend the life of this desktop, installed it in an older (4th gen Intel) Gigabyte mobo on SATA port 3 (0=boot HDD C: and D:, 1=HDD F: and G:, 2=DVD E
. Used a new BestBuy 2' data cable. Connected power to 3rd (last) connector on power ribbon shared with the two HDDs. On turning the PC back on to run Acronis, with the intent to next clone only C: to this new SSD, PC boot loops (powers down in about 5 seconds as though a restart, then powers up again, etc), nothing on screen. After a couple such restarts, i held the power button down to break this loop. I then disconnected the new SSD and after a couple more bounces the PC is back to its normal (slow) self.
I expected to be able to see the new drive automatically detected, at least, and begin cloning it from C: into a bookable drive using Acronis in manual mode. Figured I'd have to adjust the boot order and drive letters later (will want to leave D: on the existing HDD). I recall when adding the second HDD a few years ago that I just plugged it in. I checked the BIOS after all this and the SATA controller is set to AHCI. Boot order is 2-0-1.
What am I missing? Can I not just throw the new SSD onto the mobo's SATA controller to initialize it? Something wrong with my cables? Drive was not an open box, date code 2253.
Thanks for any help.

I expected to be able to see the new drive automatically detected, at least, and begin cloning it from C: into a bookable drive using Acronis in manual mode. Figured I'd have to adjust the boot order and drive letters later (will want to leave D: on the existing HDD). I recall when adding the second HDD a few years ago that I just plugged it in. I checked the BIOS after all this and the SATA controller is set to AHCI. Boot order is 2-0-1.
What am I missing? Can I not just throw the new SSD onto the mobo's SATA controller to initialize it? Something wrong with my cables? Drive was not an open box, date code 2253.
Thanks for any help.