Fatal1ty AB350 Gaming-ITX/ac no Gen3 PCIe for M.2

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   From my point of view it's not clear in which PCIe mode the SSD is running.
Did you check with a tool how the PCIE_M slot is used?
HWInfo -> Motherboard->Systemslots shows the Slot data bus width.

Is it Gen3 x2 mode, it behaves like with an old A-Series APU (Bristol Ridge).
With a Ryzen 5 3400G APU it should be Gen3 x4.
However, i think, this is a bios issue (if the drive is connected correctly).

I would contact Asrock support.

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Ray62 Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 01 Jul 2018 Location: Germany, Berlin Status: Offline Points: 706	Post Options Post Reply Quote Ray62 Report Post Thanks(0) Quote Reply Topic: Fatal1ty AB350 Gaming-ITX/ac no Gen3 PCIe for M.2 Posted: 14 Aug 2019 at 5:04am
	From my point of view it's not clear in which PCIe mode the SSD is running. Did you check with a tool how the PCIE_M slot is used? HWInfo -> Motherboard->Systemslots shows the Slot data bus width. Is it Gen3 x2 mode, it behaves like with an old A-Series APU (Bristol Ridge). With a Ryzen 5 3400G APU it should be Gen3 x4. However, i think, this is a bios issue (if the drive is connected correctly). I would contact Asrock support.
	Asrock Fatal1ty X370 Professional Gaming Offline Under test: MSI X570_MEG_ACE \| AMD Ryzen 9 3900X \| Scythe Mugen5 \| 2x16GB F4-3200C14D-32GTZ@3466 \| ASUS GeForce GTX 1080 Ti FE

thomasryzen Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Aug 2019 Status: Offline Points: 6	Post Options Post Reply Quote thomasryzen Report Post Thanks(0) Quote Reply Posted: 13 Aug 2019 at 10:19pm
	Hi, CPU is in first post. @cx5 1. M9PeGN is without heatsink, did check temperature and is 46 celcius 2. no case (didn't have tim to put pc in case) air flow is amazing :) he is in open space and distance from desk is 5 cm 3. Again to heatsink, yes it's on back but it have airflow and tem is 46 4. in uefi drive is set to M.2 NVMe and M.2 is set to Gen3

gizmic Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 13 Jun 2018 Location: Hong Kong Status: Offline Points: 677	Post Options Post Reply Quote gizmic Report Post Thanks(0) Quote Reply Posted: 13 Aug 2019 at 12:46pm
	which cpu


cx5 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 15 Sep 2017 Location: Hong Kong Status: Offline Points: 2398	Post Options Post Reply Quote cx5 Report Post Thanks(0) Quote Reply Posted: 13 Aug 2019 at 11:23am
	@tomasryzen, I think we need a lot more info in order to reply/say something. Your suffering is alarming and I'm sure many people would like to help. Without knowing much I'm just simply guessing and asking 1) M9PeGN comes with heatsink or not? if not did you add one? may be heat throttle down? 2) your itx case? small and tiny not good air flow cause nvme throttle down ??? 3) M.2 ultra socket on the back, no space, you were forced to remove heatsink??? 4) uefi settings?
	x370taichi@3.50gen4 AX750 Optane900P SN770 3800x PosdonZro4 BarrowPWM-17w>420x140x28 XFX SWFT319 6900XT MSI RX560 LP to get Fluid Motion BlueskyFRC 75hz

thomasryzen Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Aug 2019 Status: Offline Points: 6	Post Options Post Reply Quote thomasryzen Report Post Thanks(0) Quote Reply Posted: 13 Aug 2019 at 12:40am
	can anyone help me, please?

thomasryzen Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Aug 2019 Status: Offline Points: 6	Post Options Post Reply Quote thomasryzen Report Post Thanks(0) Quote Reply Posted: 12 Aug 2019 at 7:50pm
	ok, updated bios to 6.0 see gen3 in M.2 settings... but still speed is 821/823 MB/s....

thomasryzen Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Aug 2019 Status: Offline Points: 6	Post Options Post Reply Quote thomasryzen Report Post Thanks(0) Quote Reply Posted: 12 Aug 2019 at 6:35pm
	Hi, so I just build my new PC with Fatal1ty AB350 Gaming-ITX/ac with AMD Ryzen 5 3400G and Plextor M9PeGN 256GB NVMe drive... have BIOS 5.70 on board. When I test disk speed with CrystalDiskMark I get 822/822 MB/s not 3000/1000 MB/s as my M.2 drive can. In bios in Advanced -> AMD PBS -> PCIe x16 Switch I see only Auto, Gen1, Gen2 but no Gen3 Any ideas how to have PCIE3X4 on M.2 and not PCIE2X2 and have full M.2 speed?