T7910 - SAS SSD's

It's coming down to what you use it for.  The media is enterprise grade, which will allows high terabyte written per day with sustained throughput.  But its prices are several times the cost of consumer SSD.  The maximum transfer speed on these SAS controller is 12 Gbps.

For Lightroom & Photoshop, I would use an Dell Ultra-Speed Quad or equivalent (such as ASUS Hyper) on one of the PCIe x16 slot.  It will allow you to add up to x4 of 4tb NVMe SSD.  Transfer speed is ranging from 32 Gbps to 128 Gbps (with RAID).  For comparison, it costs only a fraction of the SAS drives but is performing several times faster.

Hi, Thanks for your reply. I was really focussed on the high endurance of Enterprise grade SSD's, what I didn't include was that so far I have 'managed' with 4x 4tb Corsair consumer NVMe SSD's in my precision 7730, (although recently I had one fail, it developed a power issue causing me to focus more on enterprise durability)

On the whole I don't need the outright speed given via NVMe drives (or the Dell Ultra-Speed Quad or equivalent) I actually have 6.4tb NVME on a PCIe adapter which I currently have the Lightroom catalogue on.

It was more and upgrade in speed and capacity over the HP 2.5" 15k 146GB drives that are currently in there (single partition with OS , LR and PS), I have found a supply of low 'used' SAS drives (900-1100 hours low write rate)  so cost wise its firmly in the SAS advantage.

I am thinking RAID 10, and either 1.92tb or 3.84tb drives, bearing in mind my photo memory cards are 320gb either has plenty of space to start working on the days files, as wall as my normal backup routine

The suggestion was to provide additional option to your upgrade plan in aspect of faster speed.  It's great that you already have access to those enterprise grade media.  They should work fine with your system.  The integrated SAS controller should run at 12 Gbps, twice as fast over SATA drives. 

Thank you confirming and advice, I will start sourcing them