Question AMD Rembrandt/Zen 3+ APU Speculation and Discussion

ahimsa42 · Jan 2, 2022

i'm looking forward to Tues & getting concreate info & actual benchmarks instead of speculating about RMB. pricing & availablity are also big questions which will hopefully be revealed then too.

moinmoin · Jan 2, 2022

xilli_fiberbit said:
The thunderbolt support is visible in drivers :https://forums.anandtech.com/threads/amd-rembrandt-zen-3-apu-speculation-and-discussion.2592313/post-40659217

This can be misleading, there is no "USB4" driver in Linux. Any existing USB4 hub will use the thunderbolt driver, even if the hardware only use a part of the TB features (which then prevents certification as Thunderbolt, as described in my previous post).

deasd · Jan 3, 2022

I think if Zen4 has DDR4 support, Zen3+(Rembrandt) might support as well.

(Well I just wonder why AMD thread seperate as zen4/zen3+/zen3d lol)

https://twitter.com/i/web/status/1477260483480539138

jpiniero · Jan 3, 2022

deasd said:
I think if Zen4 has DDR4 support, Zen3+(Rembrandt) might support as well.

Someone mentioned that the IP that AMD is likely using supports DDR4 and DDR5. Doesn't mean that AM5 supports it, or even mobile Rembrandt.

ahimsa42 · Jan 3, 2022

AMD CEO Lisa Su shows off 6nm Ryzen 6000 "Rembrandt" APU - VideoCardz.com

AMD releases official photo of Rembrandt APU The first official picture of the upcoming Ryzen 6000 APU series has been published by AMD CEO Dr. Lisa Su. This is actually the same silicon that we leaked over the weekend. The next-gen 6nm APU codenamed Rembrandt will be the core part of the Ryzen...

videocardz.com

ahimsa42 · Jan 4, 2022

AMD announces Ryzen 6000 mobile CPUs based on 6nm Zen3+ Rembrandt silicon - VideoCardz.com

AMD releases ten Ryzen 6000 mobile CPUs Today AMD introduces its new Ryzen CPUs based on 6nm Zen3+ microarchitecture. The following leaked spec sheet is the first document to officially mention a refined Zen3+ architecture. AMD Rembrandt APU based on 6nm process technology finally retires Vega...

videocardz.com

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Shivansps · Jan 4, 2022

Thats some really bad segmentation, it goes from 6CU to 12CU.

exquisitechar · Jan 4, 2022

Impressive iGPU clock speeds, but Rembrandt's segmentation is pretty harsh. The Ryzen 5 models have only 6 CU.

TESKATLIPOKA · Jan 4, 2022

CPU part doesn't look very interesting, could have increased L3 cache to 32MB and then shared It with IGP as Infinity cache. It would help performance.
IGP is very good, but I am surprised at only 6CU for R5, at best It will perform as Vega 8CU IGP.
For a pretty decent Full HD gaming, you need only Rembrandt APU with 12CU. Even 6800U has boost set at 2.2GHz and 12CU.
As a whole, It looks good.

P.S. I find It funny how in the previous generation, Intel had the better IGP and AMD the better CPU, and now It looks like It will be reversed. Intel will have the better CPU and AMD better IGP at >35W. If we talk about 15-28W then Rembrandt could be better even in CPU.

Shivansps: If your post was a reaction to my post, I edited my post to be more specific.

leoneazzurro · Jan 4, 2022

It seems that Rembrandt is coming as a very strong APU, only letdown being the 6 core versions being cut at a 6CU iGPU only (no intermediate versions, on one side this simplifies the segmentation, on the other it may create a gap too big between the APU versions). CPU power seems OK, both boost and base clocks substantially up for the U versions, boosts only are substantially up in the H versions and there should be some minor architectural improvement on top of that, too. 12CU versions' GPU seem quite powerful and there is a lot on connectivity too. Especially the U versions seem quite appealing. H versions may have a tougher time against ADL on the gaming laptop side.

Shivansps · Jan 4, 2022

I dont think 6CU will be decent for FullHD at all... thats just slightly better than Vega 8, what is good, yeah, but i wouldnt call it decent. I was expecting the 6CU one to be saved for a "half RMB" Ryzen 3 SKU. On a R5 thats too big of a cut.

It also, likely, means half the RDNA2 L2 as well because RMB is 2x6CU with 2MB L2 each. The R5 may be 1x6.

NostaSeronx · Jan 4, 2022

Something, I have found not sure has been found yet here.

Rembrandt and Oberon+ share new LDO regulators.
ZeroCore is returning with SmartShift 2.0 w/ A+A configs (AMD APU+AMD dGPU); HW-controlled Z-state/ZeroCore-state

leoneazzurro · Jan 4, 2022

TESKATLIPOKA said:
P.S. I find It funny how in the previous generation, Intel had the better IGP and AMD the better CPU, and now It looks like It will be reversed. Intel will have the better CPU and AMD better IGP at >35W. If we talk about 15-28W then Rembrandt could be better even in CPU.

It will depend on which power segment and budget we will look on. Rembrandt U seems quite fine in both CPU and GPU power. In the H segment the competition seems more on ADL's side (CPU wise).

tamz_msc · Jan 4, 2022

6800U will have zero real availability, just like 5800U and 4800U before it.

movdx · Jan 4, 2022

I thought AMD learnt the lesson with cezanne and U models but I was wrong. Terrible segmentation on thin and light laptops.
I also thought that 6nm was better in supply than 7nm.

jpiniero · Jan 4, 2022

exquisitechar said:
Impressive iGPU clock speeds, but Rembrandt's segmentation is pretty harsh. The Ryzen 5 models have only 6 CU.

Almost wonder if that was done so the 6600U wouldn't overshadow all of Barcelo.

NostaSeronx · Jan 4, 2022

movdx said:
I also thought that 6nm was better in supply than 7nm.

6nm's has less masks to print out, so wspm for N6 should be higher than N7. EUV SP is also faster than 193i for SAQP/SADP.

Effectively converting ~150,000 wspm of N7 to >190,000 wspm of N6, if fully converted. Basically, per phase/module N6 provides about >14,285 more wafers per month.

movdx · Jan 4, 2022

Then the 6nm supply goes somewhere else if you need for your U products to use your older parts.

Asterox · Jan 4, 2022

izaic3 said:
Looks like AV1 support made it after all!

These are the earlier rumors, which said that Rembrandt APU does not have AV1 hardware decoder.It wouldn't make any sense without AV1 support.

There is no reason to complain about R5 with only 6CU RDNA iGPU.

If they could choose, i hope most customers or 100% would choose Cezanne APU infected with RDNA2 iGPU.

- R7 5700G, 6CU RDNA2, AVI support, 2ghz iGPU

- R7 5700G 8CU Vega, 2ghz iGPU

andermans · Jan 4, 2022

movdx said:
Then the 6nm supply goes somewhere else if you need for your U products to use your older parts.

I wonder if this is a supply issue at all? I'd rather bet segmentation, given that DDR5 still seems to be somewhat more expensive and that the 5000 series was also split between Renoir and Cezanne which use the same process.

mikk · Jan 4, 2022

AV1? Didn't some people claim there is no AV1, what happened? Or is this a hybrid trickery?

Anyways the U series lineup is a big disappointment. Out of 5 new models only 2 Rembrandt and one of them has only 6 CUs instead of 12 and 300 Mhz less GPU clock, what the hell is this segmentation?

So there is basically only 1 option left for those who want a thin and light with a fast iGPU, this is a big bummer. Most of the H series get 12 CUs but who cares, they basically all get a dGPU.

uzzi38 · Jan 4, 2022

mikk said:
AV1? Didn't some people claim there is no AV1, what happened? Or is this a hybrid trickery?

Anyways the U series lineup is a big disappointment. Out of 5 new models only 2 Rembrandt and one of them has only 6 CUs instead of 12 and 300 Mhz less GPU clock, what the hell is this segmentation?

So there is basically only 1 option left for those who want a thin and light with a fast iGPU, this is a big bummer. Most of the H series get 12 CUs but who cares, they basically all get a dGPU.

VCN 3.1.1 never existed in the first place, was a jebait as far as we're concerned. VCN4 is what Rembrandt features.

Also I've said it before, I'll say it again. Rembrandt exists for the premium thin and light market first, the thin and light gaming market second and everything else a very distant third.

Want a budget thin and light? Buy Alder Lake-M.

Want a high power gaming laptop? Buy Alder Lake-P.

uzzi38 · Jan 4, 2022

First laptop to be announced as Rembrandt?

ThinkPad Z Series laptops | AMD powered, recycled materials, sustainable packaging | Lenovo US

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Question AMD Rembrandt/Zen 3+ APU Speculation and Discussion

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