Weird Bios issue "B450M-HDV
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=22286
Printed Date: 22 Dec 2024 at 11:02am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Weird Bios issue "B450M-HDV
Posted By: H3M3L
Subject: Weird Bios issue "B450M-HDV
Date Posted: 02 Mar 2022 at 11:01pm
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Hi, Im using 2400g with Asrock B450M-HDV mobo. Im facing a weird issue regarding the bios. There are some settings in Amd cbs">Nbio common options> gfx configuration" not getting saved even though im saving them while some other settings like cpu oc xmp are saved. Im currently on bios version 3.10 . 1.trying to set these .  2. after saving and reboot.  Also can i update the bios to the latest version? not updaing cz they dont recomennd in the site . 
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Replies:
Posted By: Xaltar
Date Posted: 03 Mar 2022 at 12:01am
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I see quite a few people trying to manually set the UMA size. There is no need to do so, the size is set as needed by the OS. On old motherboards with built in graphics (the iGPU is on the CPU now) you used to have to set the shared memory to a larger size in order to run certain games. Today however the system will automatically assign memory to the iGPU depending on RAM available and the needs of the application/ game being run. Forcing the size can cause instability and even prevent some games from running as the maximum forced size is lower than the amount the system is able to automatically allocate. The setting exists to force lower RAM usage. Even this is largely pointless now as the system will simply allocate less RAM when the it's needed elsewhere. As a result, AMD has not put much effort into maintaining this feature and it is often broken for various APU generations. If you were to use a 1gb dedicated GPU and ran out of VRAM the system would allocate system RAM in an attempt to compensate. System RAM is slower than VRAM on a dedicated GPU so you end up with a drop in FPS or worse, poor frametimes/ stutter. This is not a factor with an iGPU that uses system RAM all the time. There is no difference in speed between the allocated RAM and the rest of the system RAM and so there is no stutter/FPS drop when the system swaps from allocated RAM to system RAM as needed. I hope this is helpful. ------------- 
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Posted By: H3M3L
Date Posted: 04 Mar 2022 at 3:07pm
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well it dedicates 2gb by default im using linux for compiling so need every bit of ram i can get so was trying to set it as minimal as i can . What about the bios update ? |
Posted By: Xaltar
Date Posted: 04 Mar 2022 at 5:31pm
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The update should work fine with your setup, I just don't think it would be worth updating. I suspect the update won't fix the issue, as I said, AMD has neglected this feature, probably due to the limited value of it to the majority of it's users. Check carefully though your BIOS, sometimes settings are duplicated in multiple places and only one of them will work. I don't have your board so I can't check for you. Good luck. -------------
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