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PCIe M.2 in B450 Pro4 causes display failure

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=13054
Printed Date: 06 Aug 2025 at 2:29pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com


Topic: PCIe M.2 in B450 Pro4 causes display failure
Posted By: n8thanael
Subject: PCIe M.2 in B450 Pro4 causes display failure
Date Posted: 06 Dec 2019 at 1:21am
Problem:
When I place the SSD in, I can't see the UEFI boot options - the system is booting I think - from the sounds of it, Numlock is activated, mouse and keyboard lights up as normal, but no graphics are shown - I can't configure anything.

SSD: https://www.intel.com/content/www/us/en/products/memory-storage/solid-state-drives/consumer-ssds/6-series/ssd-660p-series/660p-series-1-tb-m-2-80mm-3d2.html

1TB INTEL SSD 660P
PCIe M.2 NVMe

1.) Bios is 3.20 (not listed here: http://asrock.com/mb/AMD/B450M%20Pro4/index.asp#BIOS)
2.) Graphics card: EVGA GTX770 4GB Classified - in PCIe Slot 4
3.) AMD Chipset: Ryzen5 1600
4.) 16 GB Ram in AD & B2
5.) SATA HDD Boots
6.) SATA DVD Drive Boots
7.) Can load windows to HDD from flash drive to HDD #1

From what I can tell, the bottom port:M2_2 doesn't support this card... only the top M2_1 port does
- 1 x Ultra M.2 Socket (M2_1), supports M Key type 2242/2260/2280 M.2 PCI Express module up to Gen3 x4
- 1 x M.2 Socket (M2_2), supports M Key type 2230/2242/2260/2280 M.2 SATA3 6.0 Gb/s module
from:
http://asrock.com/mb/AMD/B450M%20Pro4/index.asp#Specification

Tried: Reading this: http://forum.asrock.com/forum_posts.asp?TID=1236&title=how-to-install-windows-on-a-pcie-ssd
But the screen goes black when the M.2 PCIe SSD is installed

Haven't Tried Yet:
Swapping Graphics Cards
Fully Installing Windows
Updating BIOS (seems like this maybe a poor choice given the warnings on the page: http://asrock.com/mb/AMD/B450M%20Pro4/index.asp#BIOS



Replies:
Posted By: n8thanael
Date Posted: 06 Dec 2019 at 3:01am
Figured it out.
PCIE4 is the bottom one of the two PCIe Slots -- this slot is disabled when the Ultra M.2 Slot (M2_1) is utilized by a PCIe compatible SSD Card.

So if my graphics card was in PCIe4 slot -- the boot process would occur, but the graphics card wouldn't show anything and I lost the ability to configure. I moved the graphics card to PCIe2 - and everything works.



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