AMD Motherboards - AB350 Pro4 PCIE2 (single VGA) run at x8

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AB350 Pro4 PCIE2 (single VGA) run at x8

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=5821
Printed Date: 21 Mar 2025 at 12:46pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: AB350 Pro4 PCIE2 (single VGA) run at x8

Posted By: WakeUp77
Subject: AB350 Pro4 PCIE2 (single VGA) run at x8
Date Posted: 10 Aug 2017 at 9:31pm

My config:

MB AB350 Pro4,

CPU AMD Ryzen 5 1600,

2x DDR4 at A2 and B2 slots,

Single VGA GTX 1070 at PCIE2 slot (x16),

m.2 PCIEx4 SSD at UltraM2 slot (M2_1),

2x SATA3 HDD at SATA3_1 and SATA3_2 slots,

PSU 750W (85+ Bronze).

Few devices connected throug USB3 ports on the back side of case, UBS3.1 (Type-C) is NOT occupied.

Issue:

Checked in GPU-Z (latest ver.), in standby - "GPU supports x16 3.0, run at x8 1.1", runing bench and few games only incrase it to x8 3.0, but never seen @x16. According to sensors I have reached bus load 98% max, at game.

Is it just not switching to x16 because there is no need (Not a sufficient load, with a greater load it will switch), or there maybe some settings in UEFI. According to MoBo manual I have pluged all right in their places (M2_1 disable only PCIE4 lines, and it should work as dual at x16 (PCIE2) / x4 (PCIE4).

Already updated to latest version UEFI of MB, VGA BIOS, VGA Drivers, AMD Chipset drivers.