How about now, is there any verified info (first hand) if ASRock B450 PRO4 can work with 7 gpus?
Does any of two m2 slots even work with m2-pcie adapter at all? I have ryzen 3 without integrated graphics so i must use one gpu in main pcie x16 slot to boot., but even with only two gpus I cannot get the motherboard to detect other gpu in any of m2 slots. M2-pcie adapter works fine on biostar tb250, that motherboard use 7 gpus without problem.
I don't know why B450 wont see gpu in m2 in any configuration?!
- 1 x Ultra M.2 Socket (M2_1), supports M Key type 2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32 Gb/s) (with Vermeer, Matisse, Cezanne, Renoir, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16 Gb/s) (with Athlon series APU)**
- 1 x M.2 Socket (M2_2), supports M Key type 2230/2242/2260/2280/22110 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x2 (16 Gb/s)**
*M2_2, SATA3_3 and SATA3_4 share lanes. If either one of them is in use, the others will be disabled.
**If M2_1 is occupied, PCIE4 will be disabled.
Supports NVMe SSD as boot disks
Supports ASRock U.2 Kit