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The Ampere RTX 3080 Owners Thread

imginy said:
Thanks for letting me know.

Have you seen decent gains in games?

I could buy a new motherboard and sell mine it wouldn't cost a lot but would be a bit of messing about, just wondered if it's worth it.
Click to expand...

I dont play any of the Nvidia whitelisted games and have yet to try it in any others at the moment. But I do have a few mind I plan to test it on.
 
imginy said:
Thanks for letting me know.

Have you seen decent gains in games?

I could buy a new motherboard and sell mine it wouldn't cost a lot but would be a bit of messing about, just wondered if it's worth it.
Click to expand...

I ran the Horizon Zero Dawn benchmark before and after enabling it. It was basically the same, perhaps 2 fps or something.

Need to play around with it more, because that doesn't seem right
 
imginy said:
Thanks for letting me know.

Have you seen decent gains in games?

I could buy a new motherboard and sell mine it wouldn't cost a lot but would be a bit of messing about, just wondered if it's worth it.
Click to expand...

I wouldnt bother at the moment, I have an inkling AMD may have been working with devs prior to their new GPU launch to get them optimised for new cards, if I am right we may find the vast majority of older stuff is 1-2% at best.

I plan to test various older games myself, but I already found 3dmark only has a tiny % in benefit.
 
Thanks for letting me know guys, I won't rush out and spend any money on it then.

Also if anyone of you plays red dead 2, I would like to know if the Saint Denis area of the game plays any better with resize bar. Most of the time I'm running about 70fps at 4k with the 3080 but drops down quite a bit in Saint Denis. I had read resize bar improves red dead minimums a lot but it was different card and tested at 1080p.
 
doug_1986 said:
Yeah, it does seem like a lot of noise about something with, at best, 'very minimal" results.
Click to expand...

Yeah seems like it was exaggerated, after listening to you guys and looking at more benchmarks I'm no longer excited by it.

If gigabyte ever decide to release new BIOS for my motherboard I will enable it but doesn't seem worth any messing about.

No way I would even notice a couple of frames here and there.
 
chrcoluk said:
With rebar on in bios, my GPU seems to ramp up slower and does a little drop of clock speed now, I am averaging as follows.

17950-18000 with rebar off in bios.
17950-18000 with rebar on in bios and force enabled in driver for 3dmark.
17800-17850 with rebar on in bios, and rebar off in 3dmark.
Click to expand...

So rebar is just another Nvidia gimmick to battle AMD
 
Sarge2255 said:
So rebar is just another Nvidia gimmick to battle AMD
Click to expand...

Looks like it.

Here's my Horizon Zero Dawn benchmark.

Before Re-BAR...


After Re-BAR...


So there are improvements - GPU FPS up from 134 to 143, score from 22362 to 22659 for instance, but it only averages real world 1fps better overall.
 
Last edited:
Isn’t this pretty much the case for AMD though as well?

A few games see a marginal benefit, a few a marginal loss and others it makes zero difference.
 
From the Winraid forums (modded Bioses etc)

Quote:

"Not sure where intel locked it to 10th and 11th gen, to what I understand Intel has supported extended Base Address Registers since Haswell. As long as a CPU supports above 4G BAR, which Haswell and above all do, it is solely on motherboard to facilitate the negotiation of transfer chunk size, which is what RBAR is all about. It is not about being able to access entire GPU memory (which is what AMD mislead everyone with, and above 4G decoding already did that with Vega64 and 4790k), it is about negotiating the transfer chunks above 256MB. As long as above 4G decoding is supported by all hardware components they are absolutely capable of negotiating transfer unit size, by modifying the BAR size allocated for certain operations, as both these features were part of PCIe 3.0 feature set. RBAR being optional, so motherboard manufacturers ignored it.

With PCIe Gen3.0 and above, PCIe device can have up to six 32bit BARs and two 64bit BARs as part of PCI Sig spec 3.0. This has been supported since Haswell. It is a (not so) simple matter of motherboard bios to support the negotiated size of these BARs as transfer units bigger than 256MB, that is it."
 
b0rn2sk8 said:
Isn’t this pretty much the case for AMD though as well?

A few games see a marginal benefit, a few a marginal loss and others it makes zero difference.
Click to expand...
There was a bigger difference with AMD's SAM. Up to 20% in the best case, Nvidia's best case seems more like 10%.
 
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