With Highend boards than can split into Gen5 x8/x8 xou wouldn't even have to ditch the GPU. But it would be better to use an Gen3x8 SATA/SAS-Controller in a physical x16-Slot that is atleast x4 electrical so you have ~3.5GB/s of bandwith, which is theoretically enough for 6xSATA-SSD and will be plenty for double that number in HDD. There even are Gen4x8-Controller but they cost a lot of money.
There doesn't seem to be any demand for high-bandwith SATA-Controller outside of very potent SAS-Controller. Marvell stopped developing their SATA-Controller around 2013, so they are still stuck on Gen2, while Gen3x2 is enough for 3 SATA-SSD or 6 HDD (even the most advanced HDD don't reach 300MB/s sustained).
I have 6 HDD´s right now and giving the way SATA is going and that i am somewhat limited by my PSU and its 5v rail i dont think i am going to add more
As long as there is motherboard out there with 6 SATA ports and a free slot away from the GPU to add my x1 card when i need to replace a drive its good enough
When they remove SATA altogether i am going to have a massive problem but i dont think they are going to kill off SATA for good soon
Even if boards only have 4 SATA ports if i can add two x1 cards or that x4 card that is only x2 its good enough
Those Nimbus Exadrive 50 and 100 TB SSD´s would be awesome to have 2-4 of those would be enough but they cost $10.000 for the 50 and $40.000 for the 100 TB and thats way out of my price range
Anyway enough of that
Edit: i will be dammed turns out there do exist PCI-E gen 4 HBA cards it just cost and arm and a leg
Designed for enterprise-level storage enclosures or servers, the 9500-8i PCIe Gen4 Tri-Mode HBA is ideal for increased connectivity and maximum performance for data center flexibility.
www.broadcom.com
Designed for enterprise-level storage enclosures or servers, the 9500-8i PCIe Gen4 Tri-Mode HBA is ideal for increased connectivity and maximum performance for data center flexibility.
www.broadcom.com
No idea how those work