Resizable BAR upgrade - Worth it?

[EpicEric]

Here are my specs: https://pcpartpicker.com/list/8cZ3dD

i7 10700K, Gigabyte Aorus Z490 Elite AC, Tuf Gaming OC RTX 3080

 

I have been considering updating to support resizable BAR. My only concern is that I've heard that on some games, resizable BAR makes performance worse. Can anyone confirm this? Is it worth it to update?

 

 

[Helpful Tech Witch]

When it's worse it's within margin of error.

When it's better it's about 2-3% better.

It comes down to if you care about 2% more fps.

[EpicEric]

3 minutes ago, HelpfulTechWizard said:

When it's worse it's within margin of error.

When it's better it's about 2-3% better.

It comes down to if you care about 2% more fps.

Good point. This is the main reason why I am concerned, though.
 

[Helpful Tech Witch]

1 minute ago, EpicEric said:

Good point. This is the main reason why I am concerned, though.

hm..... thats odd. from the ltt sam videos, the worst loss was like 3% iirc

[EpicEric]

5 minutes ago, HelpfulTechWizard said:

hm..... thats odd. from the ltt sam videos, the worst loss was like 3% iirc

There is a way to turn resizable BAR off, right?

[Helpful Tech Witch]

3 minutes ago, EpicEric said:

There is a way to turn resizable BAR off, right?

Yeah, just..... Turn it off

[EpicEric]

1 hour ago, HelpfulTechWizard said:

Yeah, just..... Turn it off

I updated the motherboard's BIOS, and I'm about to do the VBIOS. By the way, the bios update fixed the other issue I was having with XMP.

[Helpful Tech Witch]

1 hour ago, EpicEric said:

I updated the motherboard's BIOS, and I'm about to do the VBIOS. By the way, the bios update fixed the other issue I was having with XMP.

Ok. Good. Tell us how it goes.

[EpicEric]

50 minutes ago, HelpfulTechWizard said:

Ok. Good. Tell us how it goes.

I have successfully updated the vbios, but my card is a dual bios card, and I don't know how to update the quiet mode bios. The program that I used to update it is meant for this card.

[Blai5e]

3 minutes ago, EpicEric said:

I have successfully updated the vbios, but my card is a dual bios card, and I don't know how to update the quiet mode bios. The program that I used to update it is meant for this card.

If it's like the EVGA series, the program (EVGA uses Precision X1) checks the selected VBIOS (quiet or performance) and applies the appropriate updated VBIOS.

[EpicEric]

17 minutes ago, Blai5e said:

If it's like the EVGA series, the program (EVGA uses Precision X1) checks the selected VBIOS (quiet or performance) and applies the appropriate updated VBIOS.

The Asus software doesn't mention anywhere what bios it thinks it's in, which makes this confusing. Is the EVGA one like that, too?

 

 

Thanks. A few other things. I restarted the PC and Nvidia co troll panel now says that RBAR is turned off. It is the correct vbios version and the motherboard bios is set correctly still.

 

Also, does this RBAR update keep compatibility with unsupported games? Will they work the same as they did before?

[Blai5e]

25 minutes ago, EpicEric said:

Thanks. A few other things. I restarted the PC and Nvidia co troll panel now says that RBAR is turned off. It is the correct vbios version and the motherboard bios is set correctly still.

 

Also, does this RBAR update keep compatibility with unsupported games? Will they work the same as they did before?

Do you have the CSM (Compatibility Support Module) option disabled in your BIOS?

 

I assume REBAR would be okay with older games or a lot of gamers would have their noses out of place.

[EpicEric]

28 minutes ago, Blai5e said:

Do you have the CSM (Compatibility Support Module) option disabled in your BIOS?

 

I assume REBAR would be okay with older games or a lot of gamers would have their noses out of place.

The cause was when I switched to quiet bios mode and back.

 

 

I want to revert to the old bios. What is the easiest way of doing this? Could I use NVFlash and TechPowerUp's archive?

[EpicEric]

7 hours ago, EpicEric said:

The cause was when I switched to quiet bios mode and back.

 

 

I want to revert to the old bios. What is the easiest way of doing this?

 

8 hours ago, Blai5e said:

Do you have the CSM (Compatibility Support Module) option disabled in your BIOS?

 

I assume REBAR would be okay with older games or a lot of gamers would have their noses out of place.

I have undone the bios update and reinstalled the original. I can't mess around with it for too long right now so I'll try it again when there's more resources, more information, better tools, and hopefully an even better vbios version.

 

I have to say, the nvflash utility was super easy and I like it.

 

[Chris Fortune]

On 4/1/2021 at 12:52 AM, EpicEric said:

Here are my specs: https://pcpartpicker.com/list/8cZ3dD

i7 10700K, Gigabyte Aorus Z490 Elite AC, Tuf Gaming OC RTX 3080

 

I have been considering updating to support resizable BAR. My only concern is that I've heard that on some games, resizable BAR makes performance worse. Can anyone confirm this? Is it worth it to update?

 

 

If this is your only concern I would say do it, it can always be disabled in BIOS if your performance is hit. Then an the future as and when that changes for you it will be a simple BIOS toggle and you are back up and running again.