New AGESA BIOS Updates enables AMD Smart Access Memory functionality for X470 and B450

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#5859038
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It will be interesting to see the difference in performance increase with SAM between PCIE3 and PCIE4.
#5859041
https://forums.guru3d.com/data/avatars/m/180/180081.jpg
Oh wow, a BIOS for my Prime X470-Pro! I didn't actually expect that. Too bad I can't buy a CPU to use with it :P
#5859085
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Hopefully they will release a bios with the new AGESA but without the SAM support so we get the benefits of the new functions on the 400 series chipsets. The X450 and X470 bios with 5000 series support will most likely remove support for older chips so it will be a judgement call on whether to flash or not depending on the chip you plan to use.
#5859141
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I_Eat_You_Alive:

Hopefully they will release a bios with the new AGESA but without the SAM support so we get the benefits of the new functions on the 400 series chipsets. The X450 and X470 bios with 5000 series support will most likely remove support for older chips so it will be a judgement call on whether to flash or not depending on the chip you plan to use.
Well, it would make keeping the old cpu "just in-case" totally pointless. I'm actually not keen on these one-way bios upgrades, even though I understand why they do it.
#5859152
https://forums.guru3d.com/data/avatars/m/225/225084.jpg
Oof no reverse sounds bad, imagine if your car had no reverse. Kinda sounds like a disaster waiting for you if things mess up.
#5859178
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I always like how AMD is bs the ignorant costumers - take something that exist in the PCIe spec for years and brand it under a cool name... "Smart Access Memory" lol....
#5859191
https://forums.guru3d.com/data/avatars/m/281/281256.jpg
ViperAnaf:

I always like how AMD is bs the ignorant costumers - take something that exist in the PCIe spec for years and brand it under a cool name... "Smart Access Memory" lol....
Apple seems to have done allright with that exact policy even managed to patent a rectangle ''''@@ sake, if it existed for years than kudos to AMD for actually thinking out the box and doing something with it
#5859215
https://forums.guru3d.com/data/avatars/m/176/176610.jpg
FranciscoCL:

It will be interesting to see the difference in performance increase with SAM between PCIE3 and PCIE4.
"Support for SAM is potentially a big one, but by being limited to Ryzen 5000 CPUs on a 500 series motherboard, its impact is less significant. Nvidia claims they're working on getting this working with Ampere GPUs, too, and for all platforms, which is a good thing as it will force AMD to open up support to all users. On that note, PCIe 4.0 doesn’t appear to be required either. We ran a few tests in Assassin’s Creed Valhalla while forcing PCIe 3.0 on our X570 test system and didn’t see a decline in performance when compared to PCIe 4.0, so that’s interesting. The testing was limited though, and it's something we’ll need to explore further with a little more time up our sleeves." - Techspot
#5859295
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This sweetens the deal because we can use a good X470 MB for a better price than overpriced B550 or X570 now!
#5859296
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This so much fun!
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#5859515
https://forums.guru3d.com/data/avatars/m/169/169516.jpg
My system refuses to boot when I enable "Above 4G decoding" in bios. The Windows screen shows up and then just reboots again and again... No on any 5000-series agesa yet tho! By the way, linux managed to boot just fine. I also set up a new windows to go instance, which experiences similar issues with 4G enabled during setup: Network card, secondary NVMe and i dunno what else refused to work. they were detected, but even after installing drivers. Once I installed the amd drivers 20.11.2 , it failed to boot again. not sure whats up with that and who is to blame for this...
#5859527
https://forums.guru3d.com/data/avatars/m/243/243702.jpg
m4dn355:

"Support for SAM is potentially a big one, but by being limited to Ryzen 5000 CPUs on a 500 series motherboard, its impact is less significant. Nvidia claims they're working on getting this working with Ampere GPUs, too, and for all platforms, which is a good thing as it will force AMD to open up support to all users. On that note, PCIe 4.0 doesn’t appear to be required either. We ran a few tests in Assassin’s Creed Valhalla while forcing PCIe 3.0 on our X570 test system and didn’t see a decline in performance when compared to PCIe 4.0, so that’s interesting. The testing was limited though, and it's something we’ll need to explore further with a little more time up our sleeves." - Techspot
There should always be quad test in such situation: 
         \ SAM OFF | SAM ON |
PCIe 3.0 |         |        |
-------------------+--------+
PCIE 4.0 |         |        |
-----------------------------
As it may show that enabling SAM on PCIe 3.0 results in matching PCIe 4.0 with SAM OFF. (Or being better.)
#5859544
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Öhr:

My system refuses to boot when I enable "Above 4G decoding" in bios. The Windows screen shows up and then just reboots again and again... No on any 5000-series agesa yet tho! By the way, linux managed to boot just fine. I also set up a new windows to go instance, which experiences similar issues with 4G enabled during setup: Network card, secondary NVMe and i dunno what else refused to work. they were detected, but even after installing drivers. Once I installed the amd drivers 20.11.2 , it failed to boot again. not sure whats up with that and who is to blame for this...
I think I read somewhere that it only works with Windows 10 installed in UEFI mode.
#5859553
https://forums.guru3d.com/data/avatars/m/283/283103.jpg
Great, no need to wait until January. Anyway, gotta change the 3800X to a 5000 series cpu first haha 🙂
#5859598
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Tuned Ram .
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#5859600
https://forums.guru3d.com/data/avatars/m/169/169516.jpg
teleguy:

I think I read somewhere that it only works with Windows 10 installed in UEFI mode.
Yeah, that is true, but that is already the case for me... The issue must be something else
#5859638
https://forums.guru3d.com/data/avatars/m/273/273678.jpg
Öhr:

My system refuses to boot when I enable "Above 4G decoding" in bios. The Windows screen shows up and then just reboots again and again... No on any 5000-series agesa yet tho!
Your devices require vendor driver updates, or simply will never run with 4G decoding properly, the asmedia chipset probably craps itself.
#5859705
https://forums.guru3d.com/data/avatars/m/273/273678.jpg
angelgraves13:

You may have Windows installed with CSM enabled, if so this will happen.
his system is not in csm.
#5859709
https://forums.guru3d.com/data/avatars/m/273/273678.jpg
Öhr:

My system refuses to boot when I enable "Above 4G decoding" in bios. The Windows screen shows up and then just reboots again and again... No on any 5000-series agesa yet tho! By the way, linux managed to boot just fine. I also set up a new windows to go instance, which experiences similar issues with 4G enabled during setup: Network card, secondary NVMe and i dunno what else refused to work. they were detected, but even after installing drivers. Once I installed the amd drivers 20.11.2 , it failed to boot again. not sure whats up with that and who is to blame for this...
look in msconfig and turn off PCI Lock. also do NOT turn on the PNP OS setting within the bios, if such an option is present.

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