Originally Posted by Abaidor
This is from Asrock and the Z390 Taichi
*M2_1, SATA3_0 and SATA3_1 share lanes. If either one of them is in use, the others will be disabled.
If M2_2 is occupied by a SATA-type M.2 device, SATA3_3 will be disabled.
M2_3, SATA3_4 and SATA3_5 share lanes. If either one of them is in use, the others will be disabled.
It looks like there is no way to set any of the M2 slots to directly communicate with the CPU via PCI-E since all are wired through the DMI Link (the chipset) meaning that you have 4X Lanes that ALL of them Have to share with SATA/USB/LAN...
With 3 M2 drives you lose the following SATA ports:
Out of the 8 SATA ports you are left with 3 and after you connect your 2X HDDs with one.
This isn't quite correct. If all three M.2 slots are filled with PCIE devices (not SATA devices), then you'd have four SATA ports left.
There are three M.2 slots on the ASRock Z390 Taichi. One slot M2_2 has its own PCIE lanes and if occupied with a PCIE device, it does not take any SATA ports. Only if it has a SATA M.2 device in it, then it replaces SATA3_1.
So, with all three M.2 PCIEx4 cards, you lose four SATA connectors and have four left.
FYI, I have two M.2 PCIEx4 SSDs on my Taichi, and 5 SATA drives and have one available SATA port.
I agree that a platform with more lanes might be worth considering or the OP may also want to consider consolidating spinning drives as several smaller capacity drives can often be replaces with a single higher capacity drive these days since $$/TB have dropped so much over the past 5 years. It also tends to really simplify data management and backup management. I'm in the process of going from 4 older spinning hard drives of varying capacities down to 2, one active and one backup, both identical capacities. I also kind of like the idea of replacing spinning drives that are more than 4-5 years old too when practical. Tends to proactively avoid drive failures.
(-1 AVX offset) on ASRock Z390 Taichi
with Noctua NH-D15 air cooler
CPU offset voltage of -25mv, runs VRVout 1.240-1.313V on full AVX load, 1.225-1.275V on non-AVX load
2x8GB [email protected] at 1.45V
, G.Skill F4-3733C17Q-32GTZKK (XMP rated [email protected]
EVGA GTX 1060 6GB OC with Corsair RMx 750W power supply
Samsung 970 EVO 500GB NVMe boot SSD and four other drives all in a Fractal Design R6 Case