Simon_Weel,
Recently I added an HP Z Turbo drive- 256GB AHCI to an HP z620.
I used EaseUS Partition Master 11.9 Pro -to setup up GPT partitions that are optimized- the partition needs to start at the coorect point- format and set the active partition for the OS. This has an easy, graphical interface that can do everything with disks, clone, migrate, merge, copy, wipe, change label, and etc.
Here's a Partition Masterscreen shot of the z620 with about half the software installed. It's a bit chaotic as a second Seagate Constellation ES.3 is being organized to go into a RAID 1 and it's still MBR.
As you know, changing an MBR disk to GPT will destroy the files.
The performance of the Z Turbo -which does have a Samsung SM951- AHCI i- in my example, perormed a bit better in the z620 (Passmark 12640) than a Samsung SM951 AHCI on a third party adapter (11559) in a z420 and the Z Turbo has a much better cooling design.
If you have several systems to do, you might consider Todo Backup workstation. Setup one drive with the ODs and Programs on a conventional HD and create a system image loaded to an appropriately sized USB drive. Install the Z Turbo drives in each systems and then use a winPE disk - Rodo makes it- and running WinPe, the flash drive will install the OS, Programs , and even confioguration setting to each system with a couple of clicks-select source image- select destination disk.
The workstation version of ToDo Backup has an extremely useful "restore to dissimilar hardware" feature. This works better than you;d think and saves a monumental amount of time/ I once installed the system image from an HP z420 to an elederly Delll Precision T3500. the T3500 activated the Dell OEM Windows automatically. Both sysems Win 7 Pro 64-bit. There were a couple of HP tools that wouldn't work on the Dell so a mild cleanup ensured. As both systems had Quadro GPU's, though very different ones, it ran perfectly after a few software activations.
Save the system image on the flash drive and if the HD fails, there's a virus, or it gathers a lot of errors and very high fragmentation, the pristine image can be quickly reinstalled. We have nine systems here, so this kind of utility is a very good time-saver.
Cheers,
BambiBoom