Steam Deck - SteamOS, Zen2 4C/8T, RDNA2 1.0-1.6 TF, 16 GB LPDDR5 88 GB/s, starting at $399 [2021-12]

[Deleted member 13524]

Uh-oh they have the same amount of L3 actually.
(AMD L3 is NOT unified at all).

I meant less L3 than the 4500U which has 2×CCXs. I know they're not unified, but there's more L3 per core which results in less travels to the RAM.

You severely overestimate the amount of b/w any RDNA2 part needs.

Perhaps I do, but I'm pretty sure RDNA2's optimal balance without Infinity Cache is above 40GB/s per TFLOPs because that's how much there is on the RDNA2 consoles, and Van Gogh's iGPU has less than half of that..

 

[Bondrewd]

128b actually so 2 QDPs running full channels.

So 2WGP disabled, leaving 4WGP active

Oh noes RMB has full 6WGP configs for Ryzen 9 alive too.

That being said I don't think Valve had input into Van Gogh's design

Nope, it's a premium FF APU and not a handheld material.

 

[Bondrewd]

I meant less L3 than the 4500U which has 2×CCXs.

Same L3 factually.
They're non-additive exclusive chunks.
Leave the CCX and you're going to the IMCs either way.

Perhaps I do, but I'm pretty sure RDNA2's optimal balance without Infinity Cache is above 40GB/s per TFLOPs because that's how much there is on the RDNA2 consoles, and Van Gogh's iGPU has less than half of that..

Good news it's 128b.
Mero's the one with 64b then.

Perhaps I do, but I'm pretty sure RDNA2's optimal balance without Infinity Cache is above 40GB/s per TFLOPs

Nah you can skewer it around by going wider on SAs and beefing up the L2 relative to CU count which is what RMB does.

 

[digitalwanderer]

Wow, I just watched the Gamer's Nexus video and the GPD Win3 and the Aya Neo seemed like the only ones close in stats...but they're both running at over a grand?!?

Why would you get one of those instead of a gaming laptop? I don't get it.

If the $400us model has an open M.2 slot I really think it could tempt me, but by the time its available in December who knows how the PC hardware price scene will be?

I'm not gonna pre-order it, but damn seeing the competition its exciting me a lot more now!

 

[Bondrewd]

but they're both running at over a grand?!?

Small volume means expensive.

If the $400us model has an open M.2 slot

It does but it's hidden pretty deep inside iirc.
Also 2230 only aka you have to source OEM drives for it.

 

[Proelite]

Same L3 factually.
They're non-additive exclusive chunks.
Leave the CCX and you're going to the IMCs either way.

Good news it's 128b.
Mero's the one with 64b then.

Source? That's FANTASTIC news.

Nvm found it.

 

[Deleted member 13524]

Good news it's 128b.

Goddammit Bondrewd!
You got me all depressed for nothing!

 

[Bondrewd]

You got me all depressed for nothing!

I'm sorry dude, a 64b config also exists and is alive and well blah-blah.
Plus GabeN himself said dual-channel L5 thus ugh

 

[Deleted member 13524]

I'm sorry dude, a 64b config also exists and is alive and well blah-blah.
Plus GabeN himself said dual-channel L5 thus ugh

No harm done because I hadn't cancelled my preorder yet like I had promised lol!

 

[digitalwanderer]

Hmmm, 128GB M.2 2230s are pretty easily available on Amazon for under $20, the 512GB is like $249. :| (Prices US, I'm hopelessly American. My apologies.)

I could handle a $400 with a 128GB drive for a bit, depending on how hard they make it to swap.

 

[Deleted member 13524]

New Hmmm, 128GB M.2 2230s are pretty easily available on Amazon for under $20

Are you sure these are NVMe drives though? At that price it might be a SATA drive, which may not be supported.

 

[eastmen]

 

[Deleted member 13524]

It also depends a lot on the microsd card they used. A 128GB UHS-II goes up to 290MB/s read which is over the level of a SATA3 SSD, but it sets you back at least $70.
A 256GB card of similar performance goes into silly prices ,at which point you're much better served by the NVMe SKUs.

EDIT: scratch that, the specs page clearly say it only supports UHS-I.

 

[Bondrewd]

A 128GB UHS-II goes up to 290MB/s read which is over the level of a SATA3 SSD

Sequentals aren't particularly relevant.
What you want is an A2 rated uSD card.
Also SATA SSDs top out at ~550MB/s.

 

[Deleted member 13524]

Because it has a sizeable CVML block that won't ever be touched here

This got me thinking.. if these are ML inference accelerators, couldn't they be used to accelerate Microsoft's ML upscaler without resorting to the GPU ALUs?

 

[digitalwanderer]

Are you sure these are NVMe drives though? At that price it might be a SATA drive, which may not be supported.

Pretty sure:

 

[Dampf]

This got me thinking.. if these are ML inference accelerators, couldn't they be used to accelerate Microsoft's ML upscaler without resorting to the GPU ALUs?

Yes, theoretically. It would be very beneficial for this hardware if used correctly.

Do we know for sure CVML is integrated into Van Gogh? I've just seen it in 2020 roadmaps, but plans could change. Is there any evidence of CVML implemented into this chip the Steam Deck uses? And if yes, how powerful is it?

Could be a game changer.

 

[Bondrewd]

Do we know for sure CVML is integrated into Van Gogh?

Yea.

Is there any evidence of CVML implemented into this chip the Steam Deck uses?

Yeah you can't just gut the blocks outta there post-tapeout.

Could be a game changer.

Nah, it's just a GNA comp offering from AMD.

 

[Deleted member 13524]

Nah, it's just a GNA comp offering from AMD.

Is it one of these?

https://www.design-reuse-embedded.c..._family_Datasheet_TIP_PB_Vision_DSP_FINAL.pdf

I read somewhere that it was the combination of a P6 and a C5.


Here:

https://twitter.com/i/web/status/1316838798823690241

If so, the dual C5 alone is seemingly capable of 2 TMACs INT8 / GHz, or up to 3.2 TOPs if it uses the same clocks as the GPU. Not too shabby on paper.

Of course, I have no idea if the implementation is practical for super low-latency operations such as ML upscaling in real-time renders.

 

[eastmen]

Looks like even emulating switch games will give you a better experience than native on the switch itself