Big Navi specs leaked by macOS Big Sur driver

CPC_RedDawn · Sep 29, 2020

Denial said: ↑

Problem is that AMD split up their architecture CDNA/RDNA. Unless they are going to reuse the 6900XTX model as a CDNA card it's a massive amount of money to do an HBM chip for one single application. Radeon VII was just one of their Instinct cards rebranded.
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This is true, but I can't help but think that an 80CU card would be starved on a 256bit bus, and this rumour of a massive cache just doesn't sound right to me...

Denial · Sep 29, 2020

CPC_RedDawn said: ↑

This is true, but I can't help but think that an 80CU card would be starved on a 256bit bus, and this rumour of a massive cache just doesn't sound right to me...
Click to expand...

Oh I definitely agree it would be starved. Not sure how AMD is going to handle it - it would either be HBM for the majority of the line up or they are doing some cool trickery with cache or something similar.

Also, unrelated, but the auto-HDR thing that was semi-announced on Xbox today would be cool for PC. Presumably Big Navi would have something similar:

Auto-HDR: A free upgrade, with no CPU/GPU impact
The above list is brief, because there just aren't many of these kinds of games in the preview period's 1,000-strong selection. That being said, I was unable to counter these examples with surprising downgrades in performance or pixel count. I've yet to boot a back-compat game on Xbox Series X and see any alarming issues, red flags, or apparent incompatibility issues. Instead, I've seen the occasional stutter in a game's boot-up sequence, or one weird occasion where booting a game resulted in an HDMI error with my 4K TV; swapping from one game to another fixed that one.

The other bonus applied to nearly every game is a new "auto-HDR" toggle, which can be enabled or disabled on a system level. With this turned on, pretty much every back-compat game on Series X receives an automatic tone-mapping upgrade to the HDR-10 standard, as driven by Microsoft's machine learning model, to find and boost obvious specular highlights (a sun in the sky, flashes of fire, car headlights) to the top of your HDR-compatible set's brightness rating. This is aided by Xbox's new, built-in HDR calibration tool, which asks players to confirm minimum and maximum brightness levels as based on sample images. (The tool will eventually roll out to other HDR-compatible Xbox consoles.)

Auto-HDR works without touching a game's original color depth, so as not to artificially oversaturate any existing color grading. But more impressively, this is built into Xbox Series X's display controller level, thus not touching either the CPU or GPU. It's a free toggle.

Due to how HDR imagery translates to standard SDR Web content, I can't show you exactly how it looks. For the most part, the effect is welcome, especially in games like Halo 5, which Microsoft clearly paid closer attention to as a first-party showcase. But it's not an across-the-board win, particularly with driving games. In games like the Xbox 360 version of DiRT 3, auto-HDR doesn't consistently recognize taillights—the things you'll see more often than anything else in an average race—so other auto-mapped highlights look more artificial.

I'm hopeful that Xbox Series consoles eventually offer a per-game toggle option, instead of making it a universal one, because when it works in older software, it's a fun surprise—especially the explosion-filled, bike-balancing madness of the original Trials HD.
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PrMinisterGR · Sep 30, 2020

Don't Windows literally do this if you enable HDR and run something in borderless?

Deleted member 213629 · Oct 1, 2020

Admittedly I am puzzled on this one too. (auto HDR) Thought with the latest adrenaline it just can tell like with VLC when you move to fullscreen how it gives you the notification (reg. HDR)

user1 · Oct 1, 2020

Denial said: ↑

Problem is that AMD split up their architecture into CDNA/RDNA. Unless they are going to reuse the 6900XTX model as a CDNA card it's a massive amount of money to do an HBM chip for one single application. Radeon VII was just one of their Instinct cards rebranded.
Click to expand...

i'd imagine for things like auto-cad hbm is probably still pretty useful since you can pack more memory on to a card, at 16gb per stack using 4 can net 64gb of vram (or more likely 32gb with 2 stacks), which isnt very feasible with gddr6 atm. Firepros arent likely to be cdna based since they are still mainly for graphics workloads (for now at least)

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Big Navi specs leaked by macOS Big Sur driver

CPC_RedDawn Ancient Guru

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