Does enabling REBAR make sense on GTX 1650?

[Evie Struggles With Life]

I haven't been able to find reliable information of older/lower end cards benefit from rebar

[Eigenvektor]

Nvidia supports it since the RTX 30-series, so no the 1650 does not benefit from it.

AMD supports it for RX 6000

[Evie Struggles With Life]

Just now, Eigenvektor said:

Nvidia supports it since the RTX 30-series, so no the 1650 does not benefit from it.

Will enabling it make something not work properly?

What about 6500/6600/6600 xt? I'm planning on upgrading if I don't die lol

[Eigenvektor]

3 minutes ago, Evie Struggles With Life said:

Will enabling it make something not work properly?

Enabling it simply won't do anything. You need to enable it both in the BIOS and on the GPU side.

 

3 minutes ago, Evie Struggles With Life said:

What about 6500/6600/6600 xt? I'm planning on upgrading if I don't die lol

Yes, you can use it on RX 6000, provided you have a compatible CPU/motherboard.

See:

AMD: https://www.amd.com/en/technologies/smart-access-memory

Nvidia: https://www.nvidia.com/en-us/geforce/news/geforce-rtx-30-series-resizable-bar-support/

[Evie Struggles With Life]

3 minutes ago, Eigenvektor said:

Enabling it simply won't do anything. You need to enable it both in the BIOS and on the GPU side.

 

Yes, you can use it on RX 6000, provided you have a compatible CPU/motherboard.

See:

AMD: https://www.amd.com/en/technologies/smart-access-memory

Nvidia: https://www.nvidia.com/en-us/geforce/news/geforce-rtx-30-series-resizable-bar-support/

Does it work with an intel cpu? Like, not SAM, rebar

[Eigenvektor]

Just now, Evie Struggles With Life said:

Does it work with an intel cpu? Like, not SAM, rebar

SAM is resizable bar, it's simply AMD's marketing name for it. It'll also work with supported Intel motherboards.

 

Intel officially supports it on 10th gen CPUs and up:

https://www.intel.com/content/www/us/en/support/articles/000091128/graphics.html

[Evie Struggles With Life]

16 minutes ago, Eigenvektor said:

SAM is resizable bar, it's simply AMD's marketing name for it. It'll also work with supported Intel motherboards.

 

Intel officially supports it on 10th gen CPUs and up:

https://www.intel.com/content/www/us/en/support/articles/000091128/graphics.html

I can enable it on my motherboard but I have i5-10400f. Does it not work on it?

EDIT: apparently it is 10th gen. So if I had rx 6 series I would have been able to benefit from rebar?

[PaulFCB]

Haven’t felt a freaking difference after enabling Rebar on a 3080, maybe Gigabyte screwed up the new BIOS so any advantage was wasted by those knuckleheads.

[PDifolco]

10 minutes ago, Evie Struggles With Life said:

I can enable it on my motherboard but I have i5-10400f. Does it not work on it?

Same here, I suspect it has more effect on AMD and now Intel GPUs...

[baronvonsatchel]

13 minutes ago, Evie Struggles With Life said:

I can enable it on my motherboard but I have i5-10400f. Does it not work on it?

Your CPU supports it. It's a small boost with AMD graphics and is practically a requirement for Intel's new ones. I don't think Nvidia benefits very much, but turning it on won't damage your PC. If for some reason it makes performance worse, which is unlikely, you can just go back into the BIOS and turn it off again.

[Eigenvektor]

27 minutes ago, Evie Struggles With Life said:

I can enable it on my motherboard but I have i5-10400f. Does it not work on it?

EDIT: apparently it is 10th gen. So if I had rx 6 series I would have been able to benefit from rebar?

Yeah, enabling it in BIOS on its own doesn't do anything. You have to enable it in the BIOS and then tell the GPU to actually use it, which would be possible with an RX 6xxx GPU (in the GPU's driver settings), but not with a GTX 1650. On AMD the setting is called Smart Access Memory, but technically it is simply reBar.

 

24 minutes ago, PaulFCB said:

Haven’t felt a freaking difference after enabling Rebar on a 3080, maybe Gigabyte screwed up the new BIOS so any advantage was wasted by those knuckleheads.

Based on the benchmarks I've seen, Nvidia doesn't benefit as much as AMD does and it also depends on the game. For some games it can even have a negative effect.

Spoiler

 

 

[Evie Struggles With Life]

14 minutes ago, Eigenvektor said:

Yeah, enabling it in BIOS on its own doesn't do anything. You have to enable it in the BIOS and then tell the GPU to actually use it, which would be possible with an RX 6xxx GPU (in the GPU's driver settings), but not with a GTX 1650. On AMD the setting is called Smart Access Memory, but technically it is simply reBar.

 

Based on the benchmarks I've seen, Nvidia doesn't benefit as much as AMD does and it also depends on the game. For some games it can even have a negative effect.

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So if I get an amd gpu I need to have rebar enabled an then enable sam in control panel right?

[Eigenvektor]

1 minute ago, Evie Struggles With Life said:

So if I get an amd gpu I need to have rebar enabled an then enable sam in control panel right?

Yes, exactly.

[Evie Struggles With Life]

Just now, Eigenvektor said:

Yes, exactly.

Considering the wording one would assume sam is different from rebar. Marketing stuff I suppose

[Eigenvektor]

43 minutes ago, Evie Struggles With Life said:

Considering the wording one would assume sam is different from rebar. Marketing stuff I suppose

Yeah. AMD were the first to support/enable it, and marketed "SAM" as an AMD feature that improves performance when combining AMD GPUs with AMD CPUs. Many people were quick to point out that it's basically just reBar and shortly afterwards Nvidia added it to their driver and then Intel added it to their boards as well. So in reality everyone has it. However, so far, AMD does seem to benefit the most.

 

AMD obviously knew it was coming, so they had the chance to optimize their architecture for it, while Nvidia could only add it to their drivers after the fact. Wouldn't surprise me if Nvidia's 40-series closes the gap. Apparently Intel's Arc actually requires it.

[Evie Struggles With Life]

5 hours ago, Eigenvektor said:

Yeah. AMD were the first to support/enable it, and marketed "SAM" as an AMD feature that improves performance when combining AMD GPUs with AMD CPUs. Many people were quick to point out that it's basically just reBar and shortly afterwards Nvidia added it to their driver and then Intel added it to their boards as well. So in reality everyone has it. However, so far, AMD does seem to benefit the most.

 

AMD obviously knew it was coming, so they had the chance to optimize their architecture for it, while Nvidia could only add it to their drivers after the fact. Wouldn't surprise me if Nvidia's 40-series closes the gap. Apparently Intel's Arc actually requires it.

I doubt we'll get them here in Ukraine at reasonable prices, unfortunately. Although if we will it's an interesting option, even though 6600 outperforms it at 1080p. Otherwise I have to go with a used 6600 or 6600xt. Hope you're right and it does support rebar on intel cpus

[Eigenvektor]

7 hours ago, Evie Struggles With Life said:

I doubt we'll get them here in Ukraine at reasonable prices, unfortunately. Although if we will it's an interesting option, even though 6600 outperforms it at 1080p. Otherwise I have to go with a used 6600 or 6600xt. Hope you're right and it does support rebar on intel cpus

It should, on 10th gen or newer. Here's a benchmark with an RX 6600 & 6800, combined with both AMD CPUs and e.g. Intel i9-10900K/12900K.

 

[Evie Struggles With Life]

7 hours ago, Eigenvektor said:

It should, on 10th gen or newer. Here's a benchmark with an RX 6600 & 6800, combined with both AMD CPUs and e.g. Intel i9-10900K/12900K.

 

Thanks for the help. Also I changed my mind on intel gpus since 6600 outperforms them at 1080p in most games