Enable Rebar in Bios for (potentially massive) performance gain

Rapala said:
I wanted to be absolutely sure there wasn't some coincidence setting and this is real so I did another test.
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I like the scientific method!

However, this likely is some side effect (or a bug)
- We don't even know if LMU makes use of ReBAR.
- ReBAR typically improves performance when lots of textures/meshes are streamed to the GPU, which is not the case in LMU
 
Atomic Andi said:
I like the scientific method!

However, this likely is some side effect (or a bug)
- We don't even know if LMU makes use of ReBAR.
- ReBAR typically improves performance when lots of textures/meshes are streamed to the GPU, which is not the case in LMU
Click to expand...
This is not game specific stuff, but driver. Mostly decrease transfers between CPU and GPU. If you have a buffer in the GPU that is 1GB, instead of making 4 transfers to move the data from the RAM to the VRAM, ReBAR will make just one transfer. Should work very well with large open world games where data has to be constantly streamed from one side to the other one.
 
In my experience setting ON I get a few percentage points more (1-2) of headroom here and there, but bigger fluctuations also towards the bottom. Overall, performance is slightly worse than OFF. Maybe it's a matter of calibrating the options such as size limit (my setting 0x0000000100000000, 4GB VRAM).
 
I've played many games where the rebar makes a difference. LMU, it does not for me. I already get pretty good frames...but it certainly does not increase anything for me. Pretty sure it's has to be considered when developing a game or take advantage of it...but I could be wrong...just what I've read.
 
Hello everyone,
the Bar or SMA enables the processor to have immediate access to the graphics card's memory and it definitely provides undeniable advantages and works perfectly with my 7600xt card with 16GB.
Then, some tweaks in the graphics options (such as removing the virtual mirror while keeping the original cockpit one) have led to a steady 110/125 fps in races with 20 cars displayed. I would say that the AMD CPU and GPU structure along with its RAM works very well. ;) ;)
 
Rapala said:
See my comparison screenshots that show you are wrong (in my case anyway). I mean I went from unplayable to high settings butter smooth, so there's obviously something at play.
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I was not referring to your case. Rather to the "calibrating" options post.
And I have this urge to mock people who respond to my pearls with half an explanation.

And obviously reBAR should be on in the BIOS.
 
As per Jays YT Video, this was supposed to be a bug effecting Intel only however i'm running a Ryzen 7800X3D and in CPUZ the rBar was showing Enabled but then i downloaded NVIDIA Profile Inspector just to check anyway and low and be hold it actually was NOT enabled exactly as per Jays video. I enabled and benchmarked. It didn't actually gain me too many more Frames as i'm pretty much at the my hard cap limit of 141 anyway but it did give me 15% more headroom on max use. Before enabling in NVIDIA Inspectore my GPU was maxing out at 100% during the benchmark, afterwards it was peaking at 85% for pretty much the same average FPS i think it was like 3 or 4 more.
 
I've enabled rebar as per video. I've no figures to support what I saw and felt. The game just felt and seemed snappier as if using a higher refresh rate monitor, silky smooth. Not very scientific I know, certainly going to leave it enabled.
 
You can verify first that it is indeed enabled by checking Nvidia Control Panel. Help>>System Information

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If it isn't, I don't think you'll see it as an option in the Profile Inspector
 
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