Question AMD Rembrandt/Zen 3+ APU Speculation and Discussion

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izaic3

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Nov 19, 2019
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Alright, so we've had some leaks so far. I don't know if any of it's been confirmed yet, as it's pretty early, but here is what I've surmised so far (massive grain of salt of course):

If if turns out to have RDNA 2 and 12 CU, I could see iGPU performance potentially almost doubling over Cezanne.

If I've made any mistakes or gotten anything wrong, please let me know. I'd also love to hear more knowledgeable people weigh in on their expectations.
 
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Kaluan

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A first tangible design for refreshed or rebranded mobile Rembrandt SKUs:

videocardz.com

ASUS ROG Zephyrus G14 with AMD Ryzen 7000HS CPU has been pictured as well - VideoCardz.com

The first gaming laptop with Ryzen 7000HS? ASUS ROG Zephyrus G14 a Ryzen 7000 treatment. ASUS new 14-inch gaming laptop is most likely set to be revealed soon. The first photograph of this new product has just been discovered at South Korean Energy Agency, as the laptop goes through the...
videocardz.com videocardz.com

Likely called Ryzen 7735H/HS, so similar or identical to 6800H/HS. Also seems to come with a Radeon RX 7000S dGPU. Dunno if Navi32 or 33 based.
 
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ahimsa42

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scineram said:
Wow, 7000S already? Probably launches at CES. S series is low power for thin and light, so probably N33. Was there any N22 is 6000S? I think N23 only.
Click to expand...
launch? if rembrandt is any indication, these probably won't be available until mid 2024 at best. maybe by then we will have some good 6800U options too.
 
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LightningZ71

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I haven't seen many good comparisons on rembrandt between native 1440, 1440 with XeSS, 1440 with FSR, and 1080p minimum. It would be i terrsting to see how capable it is with the upscaling techs and how Phoenix behaves by comparison in the future.
 
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tamz_msc

tamz_msc

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izaic3 said:
Just picked up a Thinkpad P16s with the 6850u. Let me know if you have any questions.
Click to expand...
Well you can do the honors by testing the performance delta on battery and plugged in. Set Best Performance in Power Mode in Settings -> System -> Power & battery. Keep everything else on default. Run Geekbench 5 and Speedometer 2.0. Report the Geekbench ST score and Speedometer result when on battery and when plugged in.
 
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tamz_msc

tamz_msc

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izaic3 said:
Geekbench 5 Plugged In:
Single-Core:1521
Multi-Core: 8811

Geekbench 5 Battery:
Single-Core:1361
Multi-Core: 6078
Click to expand...
That's a 11% loss in ST while on battery. My 11370H (which is basically configured like a 1165G7) loses only 4% on battery. So this is an area where AMD has to continue improving.

Try the same thing with Speedometer 2.0, with a Chromium based browser. That will align with a more real-world scenario.
 
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lightmanek

lightmanek

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tamz_msc said:
That's a 11% loss in ST while on battery. My 11370H (which is basically configured like a 1165G7) loses only 4% on battery. So this is an area where AMD has to continue improving.

Try the same thing with Speedometer 2.0, with a Chromium based browser. That will align with a more real-world scenario.
Click to expand...

You can't determine that without knowing how long this task will run for on a same capacity battery as this might simply be an OEM decision to target long battery life versus burst performance.
On the other hand, Intel's 10nm process is somewhat better suited to higher clocks, therefore not loosing efficiency as quickly going up in clocks (before hitting the wall).
 
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tamz_msc

tamz_msc

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lightmanek said:
You can't determine that without knowing how long this task will run for on a same capacity battery as this might simply be an OEM decision to target long battery life versus burst performance.
On the other hand, Intel's 10nm process is somewhat better suited to higher clocks, therefore not loosing efficiency as quickly going up in clocks (before hitting the wall).
Click to expand...
That's why I said select Best Performance setting. That overrides any OEM specific optimisations and ensures that Turbo/Boost is attained quicker.
 
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Abwx

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tamz_msc said:
That's a 11% loss in ST while on battery. My 11370H (which is basically configured like a 1165G7) loses only 4% on battery. So this is an area where AMD has to continue improving.
Click to expand...

It s the other way around, it s Intel that has to improve something...

In single core power is to be limited as well as it s well over 15W in your laptop and this considerably reduce the battery life, it was once proved in this forum that battery life is optimal when CPU power is equal to rest of the system power, so certainly lower than 15W for the CPU.
 
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lightmanek

lightmanek

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tamz_msc said:
That's why I said select Best Performance setting. That overrides any OEM specific optimisations and ensures that Turbo/Boost is attained quicker.
Click to expand...

I think BIOS still is in charge of power limits regardless of power settings in Windows. That's the reason we have such a wide spread of performances between different laptop models using technically the same CPU.

I could test my Ryzen laptop, but I'm rocking an old 4700U HP Envy model ...
 
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igor_kavinski

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tamz_msc said:
That's a 11% loss in ST while on battery. My 11370H (which is basically configured like a 1165G7) loses only 4% on battery. So this is an area where AMD has to continue improving.
Click to expand...
They probably already have done the best they can. I think your Intel CPU will burn through the battery lot faster than the Ryzen. It's a trade-off. You may be able to prevent the end of the world with a quicker calculation in a Mission Impossible type of scenario but the Ryzen will work longer and keep communication alive with the human using it in case of an emergency situation.
 
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tamz_msc

tamz_msc

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igor_kavinski said:
They probably already have done the best they can. I think your Intel CPU will burn through the battery lot faster than the Ryzen. It's a trade-off. You may be able to prevent the end of the world with a quicker calculation in a Mission Impossible type of scenario but the Ryzen will work longer and keep communication alive with the human using it in case of an emergency situation.
Click to expand...
Well if Ryzen sips battery because it doesn't want to go fast and thereby causing sluggish performance, then that is a bad compromise.
lightmanek said:
I think BIOS still is in charge of power limits regardless of power settings in Windows. That's the reason we have such a wide spread of performances between different laptop models using technically the same CPU.

I could test my Ryzen laptop, but I'm rocking an old 4700U HP Envy model ...
Click to expand...
PL2 or short-duration power limit doesn't affect ST performance that much, unless you reduce it drastically. Like I said, choosing Best Performance overrides BIOS and OEM optimizations governing boost behavior.
Abwx said:
It s the other way around, it s Intel that has to improve something...

In single core power is to be limited as well as it s well over 15W in your laptop and this considerably reduce the battery life, it was once proved in this forum that battery life is optimal when CPU power is equal to rest of the system power, so certainly lower than 15W for the CPU.
Click to expand...
Tiger Lake does just fine in the battery life department. It matches Cezanne while being bested by Rembrandt, so it ain't too bad for an older node that is primarily frequency optimized unlike the TSMC 7nm and derivative nodes used by AMD in its mobile processors.
 
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Abwx

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tamz_msc said:
Well if Ryzen sips battery because it doesn't want to go fast and thereby causing sluggish performance, then that is a bad compromise.
Click to expand...

It would be more efficient than TGL even without ST frequency cutdown since it consume considerably less in the 4GHz range.

As for being sluggish that s as bad faith as possibly can be, if it s sluggish at 1361 GB ST points it will be as much sluggish at 1521 pts, you really think that such small of a difference could be perceptible elsewhere than in your forever anti AMD rants..?..
 
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scineram

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izaic3 said:
Geekbench 5 Plugged In:
Single-Core:1521
Multi-Core: 8811

Geekbench 5 Battery:
Single-Core:1361
Multi-Core: 6078
Click to expand...
M2 Air gets 1890/8733. LMFAO absolute rekt! And half the cores are efficiency, no SMT.
This is not to diss your laptop. I would get that over any Mac. Just pissing on Apple silicon disrespecters.
 
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tamz_msc

tamz_msc

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Abwx said:
It would be more efficient than TGL even without ST frequency cutdown since it consume considerably less in the 4GHz range.

As for being sluggish that s as bad faith as possibly can be, if it s sluggish at 1361 GB ST points it will be as much sluggish at 1521 pts, you really think that such small of a difference could be perceptible elsewhere than in your forever anti AMD rants..?..
Click to expand...
It is impossible to give proper replies to you because you shift goalposts with every comment. When did efficiency become the topic under consideration?

It is a fact that all Ryzen mobile APUs deliver perciptably lower performance, with the decrease being worse as you go back each generation, when on battery as compared to plugged in. We have the data proving so. Just wait for something real-world like Speedometer to be run on battery to see just how sluggish it can be.
 
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Abwx

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tamz_msc said:
It is impossible to give proper replies to you because you shift goalposts with every comment. When did efficiency become the topic under consideration?
Click to expand...

Efficency has always been the main topic once we re talking of mobile devices, and in this case it s counter productive to use the CPU at full frequency on ST since it would exceed 15W and hence reduce battery life uselessly.

Now if you dont bother for this metric you can always set a power profile that would negate this limitation, but then the advertised run times would be no more accurate.
 
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