AMD Motherboards - LSI 9702e with b450m Steel Legend

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LSI 9702e with b450m Steel Legend

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=18149
Printed Date: 09 Aug 2025 at 7:18am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: LSI 9702e with b450m Steel Legend

Posted By: KidWobble
Subject: LSI 9702e with b450m Steel Legend
Date Posted: 16 Feb 2021 at 9:02pm

I'm trying to get into legacy boot and enter the bios of the LSI 9702 itself.

I know with certain boards like the x399 taichi the card and any SAS drives connected show up directly in UEFI but I'm not seeing this in the b450m.

I've tried changing the CSM policy for PXE and Storage but just get stuck with a blinking cursor. I tried booting with install media as well but not luck.

Is this even possible with this mobo? If not are there any m-atx alternatives where UEFI plays nicer with HBAs?

The card itself is showing up fine in Ubuntu

```
Serial Attached SCSI controller: Broadcom / LSI SAS2308 PCI-Express Fusion-MPT SAS-2 (rev 05)
LnkCap:     Port #0, Speed 8GT/s, Width x8, ASPM L0s, Exit Latency L0s <64ns
               ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+
LnkSta:     Speed 8GT/s (ok), Width x8 (ok)
               TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
```

Replies:

Posted By: StefaanC
Date Posted: 21 Feb 2021 at 4:55am

yes the x399 taichi is a threadripper board. Tried updating the bios?