Nvidia Re-Size Bar/SAM support is live for some cards, more in March - 10% performance gains

[nvidiamd]

If you have 400 or 500 series mb then you can enable it, even with 3000 series CPU and older video card. If you get any performance increase...that is another question.

 

[ltron]

It seems to be supported for even older gpu's. Look at my post above with the device manager info.

Did you test to see whether you get a performance increase though?

It's strange that Nvidia require a VBIOS update for even RTX 3080s but old AMD cards support it.

 

[JohnG7]

Late March is so far away still... And still the hurdle of the gpu vbios's releasing on time as well! Hope it drops soon...

4 weeks is the blink of an eye at me age, you must be young.

 

[Woodsta888]

4 weeks is the blink of an eye ay me age, you must be young.

I'm entitled to HAVE IT NOW!

 

[Jay85]

4 weeks is the blink of an eye ay me age, you must be young.

Depends what you class as young haha!

 

[Dontrocktheboat]

Did you test to see whether you get a performance increase though?

It's strange that Nvidia require a VBIOS update for even RTX 3080s but old AMD cards support it.

supported and actually working and delivering 15% percent in games is quite a wide margin.

Looks like nivida have actually invested a fair bit of time and R&D in getting it to work properlty.

We will see.

 

[Lightnix]

Did you test to see whether you get a performance increase though?

It's strange that Nvidia require a VBIOS update for even RTX 3080s but old AMD cards support it.

Not that strange, clearly they saw AMD releasing SAM/resizable BAR and thought "oh hey that's a pretty good idea" and copied them. By which time they'd already shipped the RTX 3080.

Edit: right I get from context you mean really old AMD cards. In which case I guess Nvidia was hard-coding the BAR size and AMD had coded it 'properly' to use whatever the system requested?

 

[gpuerrilla]

Either way, free performance is nothing to be scoffed at if its only a BIOS update away. Im just hoping it works out for all the people who arent on a 5000 series Ryzen and works on as much hardware as possible out there.

 

[TrM]

Did you test to see whether you get a performance increase though?

It's strange that Nvidia require a VBIOS update for even RTX 3080s but old AMD cards support it.

It's not strange it's NVIDIA whilst I do love my 3080 and before that my 1080ti I don't like Nvidia tactics most of the time. It's no surprise they only code it for the latest cards it's a feature to sell the latest stuff. Nvidia are not very customer friendly and will do all they can to make every last penny from anything they bring. But I do like there graphic cards

 

[LtMatt]

Linus testing with a 3080 mobile GPU.

 

[Grim5]

Linus testing with a 3080 mobile GPU.

Very odd results as it contradicts everyone else's desktop 3060 results - no one reported performance reduction yet Linus reports reduction in almost everything and Linus reported no improvements while others got up to 15% on the 3060.

The 3060 has 12gb vram, so maybe resize bar gets better the more vram you have?

The 3060 is able to make use of rebar and mobile is not but why? Maybe it's a limitation on the vram capacity or bandwidth of etc

Another reason could be that the mobile driver is broken or maybe the laptop is on the wrong bios?

 

[henson0115]

Very odd results as it contradicts everyone else's desktop 3060 results - no one reported performance reduction yet Linus reports reduction in almost everything and Linus reported no improvements while others got up to 15% on the 3060.

The 3060 has 12gb vram, so maybe resize bar gets better the more vram you have?

The 3060 is able to make use of rebar and mobile is not but why? Maybe it's a limitation on the vram capacity or bandwidth of etc

Another reason could be that the mobile driver is broken or maybe the laptop is on the wrong bios?

if you actually watch teh video and pay attention you'll have noticed Linus said that all of the work enabling re size bar was done by msi, maybe thats your clue

 

[Nexus18]

Yup I wouldn't base nvidia's re-size bar capability based on one video about a laptop...

It does seem like AMD CPUs are required to get the best from re-size bar/SAM regardless of GPU though?

 

[evohicks]

I have this setting in the bios in my Aorus Z370 Gaming 5 motherboard....

• Above 4G Decoding
  Enables or disables 64-bit capable devices to be decoded in above 4 GB address space (only if your system supports 64-bit PCI decoding). Set to Enabled if more than one advanced graphics card are installed and their drivers are not able to be launched when entering the operating system (because of the limited 4 GB memory address space). (Default: Disabled)
• 
  Am I being too optimistic lol

 

[JohnG7]

No, you can have this new feature in future if you get a new Bios.

 

[scubes]

Don’t want to sound like a newbie wot is this resizing bar?.

 

[JohnG7]

Be far easier/better to Google it TBH > " Re-Size BAR "


GeForce RTX 30 Series Performance To Accelerate With Resizable BAR Support (nvidia.com)

 

[ltron]

Very odd results as it contradicts everyone else's desktop 3060 results - no one reported performance reduction yet Linus reports reduction in almost everything and Linus reported no improvements while others got up to 15% on the 3060.

The 3060 has 12gb vram, so maybe resize bar gets better the more vram you have?

The 3060 is able to make use of rebar and mobile is not but why? Maybe it's a limitation on the vram capacity or bandwidth of etc

Another reason could be that the mobile driver is broken or maybe the laptop is on the wrong bios?

He's testing all sorts of games that are not on Nvidia's list of resizeable bar enabled games. No wonder there was no improvement. The only one he tested that was on the list was AC Valhalla which did show a 10% improvement (although AMD desktop cards show a higher 20% improvement in this game).

Here is the list of enabled games from Nvidia's article:

Assassin's Creed Valhalla
Battlefield V
Borderlands 3
Forza Horizon 4
Gears 5
Metro Exodus
Red Dead Redemption 2
Watch Dogs: Legion

AMD enables SAM (their version of resizeable bar) globally.

 

[gpuerrilla]

He's testing all sorts of games that are not on Nvidia's list of resizeable bar enabled games. No wonder there was no improvement. The only one he tested that was on the list was AC Valhalla which did show a 10% improvement (although AMD desktop cards show a higher 20% improvement in this game).

If you head over to the benchmark thread LtMatt has going on valhalla you will already see the game loves AMD cards over the nvidia ones.

Assassins Creed Valhalla Bench Thread

 

[LtMatt]

He's testing all sorts of games that are not on Nvidia's list of resizeable bar enabled games. No wonder there was no improvement. The only one he tested that was on the list was AC Valhalla which did show a 10% improvement (although AMD desktop cards show a higher 20% improvement in this game).

Here is the list of enabled games from Nvidia's article:

Assassin's Creed Valhalla
Battlefield V
Borderlands 3
Forza Horizon 4
Gears 5
Metro Exodus
Red Dead Redemption 2
Watch Dogs: Legion

AMD enables SAM (their version of resizeable bar) globally.

Good point.

SAM works on every game and most games should at least 2-3 FPS improvement from what I've seen in my testing.

If you head over to the benchmark thread LtMatt has going on valhalla you will already see the game loves AMD cards over the nvidia ones.

Assassins Creed Valhalla Bench Thread

I've tested SAM on my setup (5950X and 6900 XT) and i see 10.9% improvement at 1080P and 8.5% improvement at 2160P with SAM enabled in Valhalla.

I suspect SAM and BAR provides the biggest gains on weaker GPUs/Systems.