Zen 2 APUs/"Renoir" discussion thread

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LightningZ71

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Mar 10, 2017
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I've watched my little nephew play a few games on his 3200u and this be faster than that laptop in every way possible. It wasn't a AAA experience by any stretch, but, games at 720p, low detail were certainly usable, and that was on a slower dual core with lower graphics throughput. I expect this to do excellent duty for AMD at the low end. Also, given the likely very small size of the die, it should allow them to have credible volume at the low end and allow more affordable 2 in 1 designs to proliferate as well.

I still think that AMD could make a good case for a credible market for uSFF boxes with what is essentially the Steam Deck processor with higher thermals and power draw with a target of playable 1080p. I think it's coming when they get enough volume with Rembrandt to better cover channel demands.
 

burninatortech4

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Jan 29, 2014
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I still don't completely understand why Mendocino has any business being in >$500 USD laptops when the 5400u, 5425u, and 5625u can be found in machines in this range. Cezanne is a much faster chip than Mendocino.
 

eek2121

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Aug 2, 2005
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I still don't completely understand why Mendocino has any business being in >$500 USD laptops when the 5400u, 5425u, and 5625u can be found in machines in this range. Cezanne is a much faster chip than Mendocino.
I haven’t really seen any Cezanne U chips in that price bracket. The cheapest 5400u laptop I found was $670. The new Zen 2 parts target $400-$700 laptops. They also use DDR5 and are 6nm, so you can’t compare them to ‘classic’ Zen 2.
 
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LightningZ71

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Yields on cezanne, barcelo, and rembrandt are likely good enough to leave precious few chips so crippled that they can only be used as quad core processors without resorting to crippling good chips just to satisfy volume promises. Also, there are precious few cases where the 5400u will be better than the likely cheaper to produce 5500u in a given product. Lucienne holds up VERY well against the reduced capability cezanne parts.

What mendocino does for AMD is allow them to finally sunset vega o.g. It gives them a low end chip to replace Dali with vega 3 and the dwindling pinnacle ridge chips in the channel. (There is actually a shader model feature upgrade between pinnacle and renoir as renoir shares the VEGA VII design and not the 56/64 design.). They further divorce themselves from GloFo. That's Mendocino's purpose in the stack. It also helps them better align with Windows giving them a feature target baseline of Zen2 + RDNA2 plus brings pluton to the low end.
 

LightningZ71

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In the end, it will be facing Jasper Lake and AlderLake-N. A Tremont Quad should be able to handle the dual core Athlon well enough. AlderLake-N in a quad should be close enough to the Ryzen 3 part and in a dual-quad should match the ryzen part. Zen 2 was ballpark around Skylake in performance per mhz in most cases, as is Gracemont. Mendocino may have a higher single core boost and 1T performance, but, AlderLake - N with 8 Gracemont cores should easily outpace Mendocino in anything that needs more than 4 threads. However, this is the bottom of the market, so, very few will really care. On the iGPU side, it's going to have to depend on the number of EUs we see. TigerLake-B has a 16EU layout and a 32EU layout. The 16EU would probably struggle to keep up with a 2CU RDNA2 part, but the 32EU part may just prove better, provided that it has sufficient power available to clock high enough. Jasper Lake had a similar number of EUs.

In other words, this is competition for Celeron/Pentium - Intel Processor N5XXX/N6XXX/N7XXX through and through. Dali already had problems with Jasper Lake. It was going to be at a substantial disadvantage against AlderLake N.
 

dark zero

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Jun 2, 2015
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@LightningZ71

If only Alder Lake-N were available now. Even when it does finally show up, it's only going into Chromebooks (apparently).
Actually the Quads yes, but the Octas are another story. It should be strong enough to deliver decent performance and I don't be even surprised if there are madlads adding a basic dGPU since Intel's one is not enough good.
 

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