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

robfosters said:
I read that RBAR was a different technology to SAM, and it would work on pretty much all CPU’s.
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SAM is renamed RBAR. AMD have not enabled the tech on Zen2 - I assume it’s possible because it’s a PCI tech but I haven’t seen a statement that specifically speaks to the reason.

Maybe they’ll enable it later or maybe it’s already there.
 
Aretak said:
You realise that 3000 and 5000 series Ryzen CPUs use the same chipsets, right? And suggesting that AMD have somehow locked it off for 3000 series chips is complete BS, because it works on AMD cards with Ryzen 3000.

https://overclock3d.net/reviews/gpu_displays/smart_access_memory_on_zen_2_cpus_-_the_power_of_resizable_bar/1

So yes, if it doesn't work with Nvidia cards and Ryzen 3000 then it's 100% an Nvidia thing. At least do the most basic of research before attributing blame and fanboying for Jensen & Friends.
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AMD have not enabled it with 3000 series. You blaming Nvidia for this is laughable :D
 
Just updated my motherboard Bios Gigabyte Z390 Gaming sli, Bios F10K. Took about 30 seconds, only 1 hitch.. i lost all my OC profiles lol damn. Just spent the past 30 mins redoing them all. Good job i had the screens saved.

Now the wait for the gpu bios update and new drivers in March.
 
I wonder if the RBAR updated BIOS will nuke Ethereum mining performance on other cards (3080, 3090, etc). New cards released would come with the new bios.

I guess people would just flash the older bios to mine.
 
no_1_dave said:
Possibly this, just like Z390 isn't listed by Nvidia yet some Z390 motherboards are supporting it already
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I’ve got a GB ultra X570 board.

I’ll just check the website every now and then for potential new bioses unlocking RBAR capability.

EDIT: Scratch that. The latest bios, which I have, added RBAR. I just haven’t noticed it.
 
I think it's possible that some hardware configuration which are not officially supported may still work just no one wants to gaurantee official support to avoid bugs and also encourage people not to hold onto old hardware
 
robfosters said:
I’ve got a GB ultra X570 board.

I’ll just check the website every now and then for potential new bioses unlocking RBAR capability.

EDIT: Scratch that. The latest bios, which I have, added RBAR. I just haven’t noticed it.
Click to expand...


Most x570 boards got rebar bios weeks ago,l
 
I think it is announced it will work on 400 series boards too so if that is the case then it will work with the Zen 2, there is nothing else to stop them working with Zen 2.
 
no_1_dave said:
Possibly this, just like Z390 isn't listed by Nvidia yet some Z390 motherboards are supporting it already
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Yup, all i had to do was update bios and enable 4G decoding then that shows Resizeable bar which you can set to auto/disable/enable.
 
The eurogamer 3060 review has some benchmarks with it enabled on a z490. Seems the benefits decrease as resolution increases. Be interesting to see what happens with the faster cards.
 
If the motherboard addresses it, I cant see why Zen2 gets shafted. I can see why @robfosters stood his ground, if nvidia enable this for all cpu's then it should be fair game - down to the mobo, microcode + chipset no?

Example article.
 
Some older Mobos may be able to get this via bios mod so long as you have a setting called "4G Decoding", it is either in Advanced or Boot menus normally (on my Z87 it is in the same menu as Memory Remap).

210226005719.png
 
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Looking forward to being able to try out the RBAR but it looks like from that list of games it doesn’t currently support any game I play anyway! I wonder if going forward games might be designed with this ability in mind and thus become more dependent on it.


rtho782 said:
I wonder if the RBAR updated BIOS will nuke Ethereum mining performance on other cards (3080, 3090, etc). New cards released would come with the new bios.

I guess people would just flash the older bios to mine.
Click to expand...

The rumours are around future shipments of other cards in the stack having different device IDs and the crypto mining gimp... if that’s the case then it’s unlikely you’ll see a bios update gimp existing card’s mining capability, only on refreshed product lines going forwards.

Of course the flip side is that if they do indeed release a full stack of gimped RTX cards the rewards for miners bypassing it are that much greater and would likely just accelerate workarounds.
 
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