AMD Motherboards - ASRock A620M-HDV/M.2+ Max VRAM & lines of PCIe 16

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ASRock A620M-HDV/M.2+ Max VRAM & lines of PCIe 16

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=107090
Printed Date: 19 Jul 2025 at 11:17am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: ASRock A620M-HDV/M.2+ Max VRAM & lines of PCIe 16

Posted By: Orialeks
Subject: ASRock A620M-HDV/M.2+ Max VRAM & lines of PCIe 16
Date Posted: 24 Apr 2025 at 5:13am

Hello! I'd like to buy motherboard ASRock A620M-HDV/M.2+.
But I need to be sure in 2 important moments of this motheboard:
1) What is the max volume of VRAM using by intergated graphics in CPU?
2) WHat is number of PCIe 16x lines in fact. 16 or less?
Thank's for helping. :)

Replies:

Posted By: Orialeks
Date Posted: 24 Apr 2025 at 5:16am

P.S. Unfortunatly, there is no such an information i need in official page of this motheboard.

Posted By: eccential
Date Posted: 24 Apr 2025 at 7:49pm

I was able to assign 4GB to mine (9800X3D). It was hidden away in the BIOS setting, and I don't remember exactly where.

I think there's a way to manually specify the amount, but I don't know what the max is.

I don't know if this is up-to-date, but according to that list, 4GB is max. Surely, there's got to be a manual setting to give it more (if you have lots of DRAM).

https://community.amd.com/t5/pc-processors/can-i-adjust-the-video-memory-size-with-ryzen-9-7900x3d-with/m-p/653165" rel="nofollow - https://community.amd.com/t5/pc-processors/can-i-adjust-the-video-memory-size-with-ryzen-9-7900x3d-with/m-p/653165

Posted By: M440
Date Posted: 25 Apr 2025 at 4:21am

eccential wrote:

I was able to assign 4GB to mine (9800X3D). It was hidden away in the BIOS setting, and I don't remember exactly where.

I think there's a way to manually specify the amount, but I don't know what the max is.

I don't know if this is up-to-date, but according to that list, 4GB is max. Surely, there's got to be a manual setting to give it more (if you have lots of DRAM).

https://community.amd.com/t5/pc-processors/can-i-adjust-the-video-memory-size-with-ryzen-9-7900x3d-with/m-p/653165" rel="nofollow - https://community.amd.com/t5/pc-processors/can-i-adjust-the-video-memory-size-with-ryzen-9-7900x3d-with/m-p/653165

you need to switch to UMA_SPECIFIED in GFX menu.

-------------
asrock b650m-hdv/m.2, ryzen 7700x@85watt, arch/kde

Posted By: neolz75
Date Posted: 26 Apr 2025 at 12:34am

asrock b650m bios shows max UMA Buffer size 16GB, screenshot

https://ibb.co/ds6WGyyM" rel="nofollow">

you can check PCIe lanes on chipset page and also depends on processor too like 8500G processor will provide lesser lanes than 8600G

https://www.amd.com/en/products/processors/chipsets/am5.html

Posted By: Orialeks
Date Posted: 03 May 2025 at 8:55pm

Thank everyone for helping. I finally bought the motherboard.
I've found in GFX options UMA buffer size, but before it needs to activate GFX configuration as specified.
I'm very happy that this A620 motherboard can support up to 16Gb UMA buffer size.
Because of this there are very good results in games such as Forza Horizon 5 (60fps in 1080p mode).
I had some thoughts of that motherboard can support no more than 2Gb VRAM.

Posted By: neolz75
Date Posted: 04 May 2025 at 3:45am

sometimes the UMA Buffer Limit is also mentioned in Motherboard's User Manual on their respective websites. another way to find out the max vram limit.