Thursday, November 19th 2020

MSI Releases Resizable BAR Support BIOS Updates

MSI, a world-leading motherboard manufacturer, announces support for AMD's new SMART ACCESS MEMORY feature. SMART ACCESS MEMORY is an innovative feature. It allows the system to access the full capacity of the VRAM on the graphics card. Compare to the current solution which has 256 MB access limitation, this feature will provide the users better gaming experience.

For MSI motherboard users, enabling SMART ACCESS MEMORY is quite simple. It only takes a few clicks after updating the BIOS. Go to "Settings > Advanced > PCI Subsystem Settings", enable "Re-size BAR" and "Above 4G memory/Crypto Currency mining", press "F10", to save the settings and reboot. The requirement of this feature is pairing the AMD Radeon RX 6000 series graphics card with AMD Ryzen 5000 series desktop processor. And don't forget to update the graphics card driver to the latest version as well. After these steps, this feature is online and ready to boost the gaming performance.
All the AMD 500 series motherboard from MSI is now ready for this new feature. Users can go to the corresponding support page of the product to download the latest BIOS for this breakthrough technology and enjoy that sweet performance boost.
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7 Comments on MSI Releases Resizable BAR Support BIOS Updates

#1
kayjay010101
"SMART ACCESS MEMORY is an innovative feature"

Ah, yes, very innovative! It's only been a part of the windows display drivers for the very short time of 3 years.. and much longer on Linux.
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#2
R-T-B
kayjay010101
"SMART ACCESS MEMORY is an innovative feature"

Ah, yes, very innovative! It's only been a part of the windows display drivers for the very short time of 3 years.. and much longer on Linux.
not part of the drivers, and certainly not in linux, but it is part of the PCI-SIG spec.
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#3
kayjay010101
R-T-B
not part of the drivers, and certainly not in linux, but it is part of the PCI-SIG spec.
Is it not? It's part of WDDM 2.0, which is part of the driver architechture on Windows 10 (which DirectX12 requires, so it's part of any driver that includes DirectX12 support). And I thought I read somewhere the Linux kernel has resizable BAR support, but I don't have any sources to back up that claim. I'll admit I don't have much knowledge on the subtle differences here so I'm probably wrong in saying it's part of Windows 10 and has been for a while, but it's certainly not innovative in any way. It's just now we actually get to see someone use the feature.
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#4
ZoneDymo
kayjay010101
"SMART ACCESS MEMORY is an innovative feature"

Ah, yes, very innovative! It's only been a part of the windows display drivers for the very short time of 3 years.. and much longer on Linux.
well it was innovative when it was innovated right? when does something suddenly stop being an unnovative feature just because the innovation happened a while ago?
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#5
kayjay010101
ZoneDymo
well it was innovative when it was innovated right? when does something suddenly stop being an unnovative feature just because the innovation happened a while ago?
My point being it was innovated long ago, which makes it no longer innovative. The definition of innovative is "featuring new methods; advanced and original.". SAM isn't innovative in that sense, since it's just a marketing term for something that's been part of an OS the majority use for 3 years, and part of the PCI spec for over a decade.
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#6
R-T-B
kayjay010101
Is it not? It's part of WDDM 2.0
News to me. Most drivers just set it to 256mb and leave it.
Posted on Reply
#7
kayjay010101
R-T-B
News to me. Most drivers just set it to 256mb and leave it.
"It is typical today for a discrete graphics processing unit (GPU) to have only a small portion of its frame buffer exposed over the PCI bus. For compatibility with 32bit OSes, discrete GPUs typically claim a 256MB I/O region for their frame buffers and this is how typical firmware configures them.

For Windows Display Driver Model (WDDM) v2, Windows will renegotiate the size of a GPU BAR post firmware initialization on GPUs supporting resizable BAR..."
source: docs.microsoft.com/en-us/windows-hardware/drivers/display/resizable-bar-support

You're right in that most (all) drivers set it to 256mb and leave it, I'm just stating the option to do otherwise has been there for years. AMD is just finally using the option, with NVIDIA to follow suit shortly.
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