Nvidia Resizable BAR Tested, Benchmarked
- Thread starter Steve
- Start date
Hey watch you tongue! I would totally buy a 3080/6800XT for my 1080p monitor, although I would use it maxed out in games, so RT ON.
I would do that if I could buy one (at MSRP that is) because I like to buy a good (overpowered GPU) to last me 4-5 years at 1080p Ultra. I don't like to upgrade every 1-2 years, nor do I like to play 1st year at 4k, next year at 1440p and 3rd year at 1080p because that's how fast tech gets old when stressed vs the latest AAA games...
But seeing how upset I am at nvidia for their past and recent lies, I would buy the RX 6800/XT before giving the nvidia cards a 2nd chance, though...
At the time it was exclusive,it took AMD to enable this for Nvidia to enable this.
zamroni111
Posts: 446 +249
We need to see this retested on rtx 3060.
3070, 3080 & 3090 are not made from the ground up to support resizable bar
3070, 3080 & 3090 are not made from the ground up to support resizable bar
Buying a 3090 is 100% the smart way to go #EmbarrassingFlex
Wasting time in the BIOS is probably more constructive
Is there a compelling reason to disable it after you enabled it? Particularly if you are not experiencing any incompatibility issues.
It was a sarcastic response to the comment.
Mr Majestyk
Posts: 2,058 +1,903
So Nvidia trash talks and AMD just delivers. This was embarrassing result for Nvidia. I notice the article which started off gushing about Nvidia's claims didn't slam them when the results were collated. If AMD had made the same grandiose claims and delivered almost sweet fa in most cases they would have been slammed. You went very easy on them in the summary
Geralt
Posts: 1,387 +2,213
Sure, it is on your hard drive, next to the boot partition (and if you have an SSD, or even better, an NVME SSD, then your cached FPS is accessed even faster).
(come on mate, we are just pulling your leg
Guys @ Techspot, ReBar is a feature if you have lots of VRAM to spare. A 3080 is not the right card to test this on. It makes way more sense to test the 3090 here or even the upcoming 3080 Ti with 12GB VRAM. All Radeons benefit the most from this feature because they have 16GB VRAM etc.
I'm at a lost here, why exactly do you think having more VRAM makes Resizable BAR work better? What is your understanding of how this feature works?
10% performance regression seems to be a pretty compelling reason if you found it worth enabling in the first place.
cliffordcooley
Posts: 13,141 +6,441
Once turned on in BIOS. Can it not be toggled on and off through software?
cliffordcooley
Posts: 13,141 +6,441
Hmm, guess that is where nVidia drivers doing so automatically is more than just a convenience. That is if there is no way to easily toggle manually.
quadibloc
Posts: 423 +275
I remember looking up information about the Xeon Phi card, and learned that you need to enable Resizable BAR to make use of it. So it's something Intel has had available, at least with its Xeon chips, for quite some time. Understandably, since most gamers don't use Xeon systems, it hadn't been worthwhile for Nvidia to include this on their graphics cards until AMD started including it on their Ryzen 5000 series.
But this makes the news story about AMD graciously providing technical assistance to Nvidia - and Intel (!) - to achieve compatibility with Smart Access Memory a bit puzzling. Of course, no doubt there's a simple explanation, such as SAM being a partial implementation of Resizable BAR, so there are some parts that have to be avoided for compatibility.
But this makes the news story about AMD graciously providing technical assistance to Nvidia - and Intel (!) - to achieve compatibility with Smart Access Memory a bit puzzling. Of course, no doubt there's a simple explanation, such as SAM being a partial implementation of Resizable BAR, so there are some parts that have to be avoided for compatibility.
Geralt
Posts: 1,387 +2,213
cliffordcooley
Posts: 13,141 +6,441
Maybe that will change.
Theoretically, it's possible to change BAR size, without recourse to fiddling about with the BIOS. It all depends on the graphics card and the system. Take Nvidia's Tesla models, as an example: these can be switched between graphics and compute mode, provided the hardware and software environment permits it. In graphics mode, BAR size defaults to 256 MB, whereas in compute mode it's 8 GB. It's by no means a simple toggle in a GUI, prevents the GPU from acting as a primary display device, and requires a full system reboot, but it ultimately implies that a BAR size reconfiguration via software running in the OS is possible.
It's even weirder that nobody except me took your comment seriously. And it IS a serious matter. I've seen this kind of thing before. Same card, same game, sudden change of performance. Newer drivers cannot explain the 50% change in performance. CPU can't explain 50% change in performance at 4K, where GPU is the bottleneck. It has to be something else.
What game are we talking about here?
Death Stranding in 4K. In the latest article the GPU had around 150 fps, while in this older one:
Nvidia GeForce RTX 3080 Review
Nvidia claims the new GeForce RTX 30 graphics series provides a giant leap in raw graphics performance, based their latest Ampere architecture, today we can finally show...
www.techspot.com
Did you notice that the 1440p results changed as well? Did you also notice that the test system also completely changed?Death Stranding in 4K. In the latest article the GPU had around 150 fps, while in this older one:
...it had around 100 fps.Nvidia GeForce RTX 3080 Review
Nvidia claims the new GeForce RTX 30 graphics series provides a giant leap in raw graphics performance, based their latest Ampere architecture, today we can finally show...
Hint: compare the 5950X and 3950X below.
And finally, yes in addition to all that the game has seen performance updates as well.
"The way AMD promoted and implemented Resizable BAR on Radeon 6000 GPUs, it required to be paired with a Ryzen 5000 series CPU and newer 500 series motherboard"
It's false. Resizable BAR works with Ryzen 3000 and chipset 400.
https://www.amd.com/en/technologies/smart-access-memory
It's false. Resizable BAR works with Ryzen 3000 and chipset 400.
https://www.amd.com/en/technologies/smart-access-memory
That's not what the sentance says. AMD only supported SAM on Ryzen 5000 series CPUs with a 500 series chipset with a Radeon 6000 GPU when it was first implemented. The Ryzen 3000/400 chipset support came later.
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