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Do I have AMD SAM enabled or not??

morromeyer
By morromeyer
in Graphics Cards
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CPU: Ryzen 5 3600

GPU: Radeon RX 5600XT

 

For some time now, I've had the option to enable AMD SAM in the Adrenaline drivers (under Performance - Tuning), including the 22.1.1 driver that I have currently.

The "red brain" icon is visible and Adrenaline shows that SAM is ON. It also automatically turns off if I disable the Resize BAR option in my UEFI, so there seems to be something going on.

 

However, both GPU-Z and CapFrameX report that Resize BAR is disabled. In fact, CapFrameX shows "Resizable Bar HW: Off" and "Resizable Bar SW: On", but I don't get what this means! See the screenshot.

I also don't see "Large Memory Range" under Device Manager...

 

So the question is: Do I have AMD SAM endabled or not?? Should I trust the Adrenaline drivers, or GPU-Z/other independent software/Windows...?

caprframex.png

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HW = Hardware

SW = Software

 

I assume it means its enabled in software, but it's disabled at the hardware level. You probably still need to enable it in BIOS.

Remember to either quote or @mention others, so they are notified of your reply

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20 minutes ago, morromeyer said:

Radeon RX 5600XT

Resizable BAR is not supported by 5600XT (which is why is shows as "off" in HW).

Main System (Byarlant): Ryzen 7 5800X | Asus B550-Creator ProArt | EK 240mm Basic AIO | 16GB G.Skill DDR4 3200MT/s CAS-14 | XFX Speedster SWFT 210 RX 6600 | Samsung 990 PRO 2TB / Samsung 960 PRO 512GB / 4× Crucial MX500 2TB (RAID-0) | Corsair RM750X | Mellanox ConnectX-3 10G NIC | Inateck USB 3.0 Card | Hyte Y60 Case | Dell U3415W Monitor | Keychron K4 Brown (white backlight)

 

Laptop (Narrative): Lenovo Flex 5 81X20005US | Ryzen 5 4500U | 16GB RAM (soldered) | Vega 6 Graphics | SKHynix P31 1TB NVMe SSD | Intel AX200 Wifi (all-around awesome machine)

 

Proxmox Server (Veda): Ryzen 7 3800XT | AsRock Rack X470D4U | Corsair H80i v2 | 64GB Micron DDR4 ECC 3200MT/s | 4x 10TB WD Whites / 4x 14TB Seagate Exos / 2× Samsung PM963a 960GB SSD | Seasonic Prime Fanless 500W | Intel X540-T2 10G NIC | LSI 9207-8i HBA | Fractal Design Node 804 Case (side panels swapped to show off drives) | VMs: TrueNAS Scale; Ubuntu Server (PiHole/PiVPN/NGINX?); Windows 10 Pro; Ubuntu Server (Apache/MySQL)


Media Center/Video Capture (Jesta Cannon): Ryzen 5 1600X | ASRock B450M Pro4 R2.0 | Noctua NH-L12S | 16GB Crucial DDR4 3200MT/s CAS-22 | EVGA GTX750Ti SC | UMIS NVMe SSD 256GB /

TEAMGROUP MS30 1TB | Corsair CX450M | Viewcast Osprey 260e Video Capture | Mellanox ConnectX-2 10G NIC | LG UH12NS30 BD-ROM | Silverstone Sugo SG-11 Case | Sony XR65A80K

 

Camera: Sony ɑ7II w/ Meike Grip | Sony SEL24240 | Samyang 35mm ƒ/2.8 | Sony SEL50F18F | Sony SEL2870 (kit lens) | PNY Elite Perfomance 512GB SDXC card

 

Network:

Spoiler 
                           ┌─────────────── Office/Rack ────────────────────────────────────────────────────────────────────────────┐
Google Fiber Webpass ────── UniFi Security Gateway ─── UniFi Switch 8-60W ─┬─ UniFi Switch Flex XG ═╦═ Veda (Proxmox Virtual Switch)
(500Mbps↑/500Mbps↓)                             UniFi CloudKey Gen2 (PoE) ─┴─ Veda (IPMI)           ╠═ Veda-NAS (HW Passthrough NIC)
╔═══════════════════════════════════════════════════════════════════════════════════════════════════╩═ Narrative (Asus USB 2.5G NIC)
║ ┌────── Closet ──────┐   ┌─────────────── Bedroom ──────────────────────────────────────────────────────┐
╚═ UniFi Switch Flex XG ═╤═ UniFi Switch Flex XG ═╦═ Byarlant
   (PoE)                 │                        ╠═ Narrative (Cable Matters USB-PD 2.5G Ethernet Dongle)
                         │                        ╚═ Jesta Cannon*
                         │ ┌─────────────── Media Center ──────────────────────────────────┐
Notes:                   └─ UniFi Switch 8 ─────────┬─ UniFi Access Point nanoHD (PoE)
═══ is Multi-Gigabit                                ├─ Sony Playstation 4 
─── is Gigabit                                      ├─ Pioneer VSX-S520
* = cable passed to Bedroom from Media Center       ├─ Sony XR65A80K (Google TV)
** = cable passed from Media Center to Bedroom      └─ Work Laptop** (Startech USB-PD Dock)

Retired/Other:

Spoiler

Laptop (Rozen-Zulu): Sony VAIO VPCF13WFX | Core i7-740QM | 8GB Patriot DDR3 | GT 425M | Samsung 850EVO 250GB SSD | Blu-ray Drive | Intel 7260 Wifi (lived a good life, retired with honor)

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20 hours ago, Eigenvektor said:

HW = Hardware

SW = Software

 

I assume it means its enabled in software, but it's disabled at the hardware level. You probably still need to enable it in BIOS.

I did not know that this was possible? Resize BAR is already enabled in UEFI. Again, Adrenaline reports that SAM is on, and if I turn off Resize BAR in BIOS the Adrenaline setting automatically goes off with it...

20 hours ago, AbydosOne said:

Resizable BAR is not supported by 5600XT (which is why is shows as "off" in HW).

This is what the official AMD page for SAM suggests, but why does it then appear as an option in Adrenaline?

 

20 hours ago, Pixelfie said:

Since driver version 21.9.1 all RX 5000 cards are supported.

This is what I thought since reading this PCGamer article too, but the official AMD page still only mentions Radeon 6000 (although Ryzen 3000 support is there).

 

It seems to really exist in a sort of limbo between supported and not supported... But I still don't know if it is actually enabled on my system or not 😛

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1 hour ago, morromeyer said:

This is what I thought since reading this PCGamer article too, but the official AMD page still only mentions Radeon 6000 (although Ryzen 3000 support is there).

 

It seems to really exist in a sort of limbo between supported and not supported... But I still don't know if it is actually enabled on my system or not 😛

The AMD page probably isn't updated. As you can see here the RX 5000 series are supported now.

 

If you see games performing better (usually ~10-20fps) with it enabled, that means it's working properly.

 

Can you share a screenshot from what GPU-Z shows under Advanced > PCIe Resizable BAR? It should look something like this.afbeelding.png.40ddef0645742494ec7195d8737ecf4d.png

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1 hour ago, morromeyer said:

I did not know that this was possible? Resize BAR is already enabled in UEFI. Again, Adrenaline reports that SAM is on, and if I turn off Resize BAR in BIOS the Adrenaline setting automatically goes off with it...

Wild guess: Bios update needed?

 

I found information on some other pages that a certain minimum version of AGESA is needed to support rBar. Maybe a newer version is required for actual support in combination with RX 5xxx GPUs. So maybe you do have the option to enable it, but it doesn't actually work with the 5600XT until a later version?

Remember to either quote or @mention others, so they are notified of your reply

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30 minutes ago, Pixelfie said:

The AMD page probably isn't updated. As you can see here the RX 5000 series are supported now.

Ah, that's more than official enough. Thanks!

31 minutes ago, Pixelfie said:

If you see games performing better (usually ~10-20fps) with it enabled, that means it's working properly.

I'm trying to bench it with and without SAM turned on in Adrenaline in Godfall, as this is one of the titles where it's supposed to matter a lot (for rdn2...) but haven't found a good area of the game to bench in a consistent so far. Will share when done.

33 minutes ago, Pixelfie said:

Can you share a screenshot from what GPU-Z shows under Advanced > PCIe Resizable BAR? It should look something like this.

Okay, this is strange, because for me it looks like below. A clear "No" for Resize BAR in BIOS, but I'm 100% sure it's set correctly, with 4G encoding as well... Could be a BIOS bug, see below.

 

19 minutes ago, Eigenvektor said:

Wild guess: Bios update needed?

It could be a BIOS bug, but I have the newest BIOS for my B550M Mortar Wifi (1.90) from Dec 20. That's AGESA 1.2.0.5. Ugh, I hope not this, the last BIOS is from September...

gpuz.png

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49 minutes ago, morromeyer said:

Ah, that's more than official enough. Thanks!

I'm trying to bench it with and without SAM turned on in Adrenaline in Godfall, as this is one of the titles where it's supposed to matter a lot (for rdn2...) but haven't found a good area of the game to bench in a consistent so far. Will share when done.

Okay, this is strange, because for me it looks like below. A clear "No" for Resize BAR in BIOS, but I'm 100% sure it's set correctly, with 4G encoding as well... Could be a BIOS bug, see below.

 

It could be a BIOS bug, but I have the newest BIOS for my B550M Mortar Wifi (1.90) from Dec 20. That's AGESA 1.2.0.5. Ugh, I hope not this, the last BIOS is from September...

gpuz.png

Maybe try a BIOS reset?

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Okay, I think I have figured out the status quo. According to this forum post other owners of 5600 XT cards experience the same as me. Digging deep (booting a Linux distro off a USB stick among other things) leads me to the same conclusions as others in that thread have found: namely that the 5600XT only enables 1GB out of the 6GB total for the resizable BAR, instead of the whole thing. So it's almost literally "half-way enabled" in that the BAR is larger than the default 256MB, but not equal to the full VRAM size.

 

We will see if AMD ever says anything about this, but I have my doubts 😛 Thank you to everyone who answered in this thread! Enjoy your weekend!

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