Enabling NVME on STRIX B450-F GAMING II

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3 Aug 2018
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I am having difficulty getting my friend to enable his new Samsung 990 Pro NVME on his computer. We have made sure the device is physically installed correctly and have unplugged and plugged in to assure seating is proper. It's installed in the M.2_2 slot at the bottom of motherboard underneath the GPU. When booting into the bios it doesn't appear to be detected and in the bios settings there doesn't appear to be anything on the onboard configuration to enable the M.2 features, it doesn't appear to detect anything.

Specifically the menus accessed are Advanced Mode > Advanced > Advanced/ Onboard Devices Configuration. From here there is an option for M.2_1 Control but no mention of M.2_2 Control. According to the manual we are using the M.2_2 slot which appears to be completely missing from the bios options. SATA ports are currently occupied in slots 3 and 4. Possibly unrelated there was another "SATA configuration" menu that showed SATA slots 1 to 6 and M.2(Gray) at the bottom, and this said "Empty" but no options were available, just looked like a detection only thing.

Grasping at straws, the only available option we had to even change anything was in the M2_1 Control and changed it from "Auto" to the only other option "SATA 56" but this did nothing. Bios, disk management and file explorer do not recognise a device. We've rebooted a few times and as mentioned physically re-seated and no detection anywhere.

I assume this must be a bios setting we've not properly enabled, however there simply seems to be no available option to enable to M2_2 unless we're missing something. Any feedback would be appreciated, because of removal of the CPU cooler and motherboard bracket etc being required to access M.2_1, it would be brilliant if this can be activated on the M2_2 slot. According to what I've looked up the NVME requires being in the M.2_2 slot?
 
Thank you for the reply, will have to try that, it unfortunately does mean i'll have to travel to him and the CPU cooler will need removing so a bit of a hassle but what you've said makes sense. The only aspect I'm hopeful for is the M.2_1 options change in bios once it's plugged in, as the only option earlier was Auto or SATA56 mode, no PCIE
 
An update. I've gone over to my friends and installed it in the M.2_1 slot and the same results. There is only SATA56 and no PCIe mode on that port according to the bios, the only option now is to update the bios which is more annoying due to there already being a OC on it and also neither of us have USBs to use... so 1 has been ordered
 
Did you try disabling SATA 5/6 and then seeing if it worked
No option to disable. What I'm used to is enabling and disabling features but his bios doesn't seem to work like that.

My only options for M.2 control were "auto" and "SATA56". Which means either I manually choose SATA56 or the bios choose it.
 
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