Quote from: Neenyah on January 13, 2024, 16:58:13the way to achieve 7500 speed is to use HDI technology in the PCB to minimise stub reflection

www.youtube.com/watch?v=n5hGqZ0PVI8
How does the motherboard in this netbook differ from the motherboard of an expensive laptop? The answer is obvious - nothing but the stupid greed of laptop manufacturers. In cheap laptops, no one will create a motherboard with high-quality circuit design, but in expensive ones this argument does not work. So congratulations bot, you're lying again. And your link has nothing to do with the topic.

We know for sure that there is no problem with the 7500, other than the stupid greed of laptop manufacturers. They significantly inflate the price of ram/ssd installed from the factory, but for some reason they forget to install the working 7500, including the corresponding motherboard, even in obviously expensive models...

The difference in wholesale prices for 7500/6400 is minimal and, as we know, even this model already costs 7500. Because 6400 is simply running out on the market.

Lenovo's stupid greed led to a shameful technical solution with slow RAM.

And in general, as I have written many times, the memory controller in all Zen is obviously up to 1.5 times slower than the same controller in Intel chips. This is a shame for both AMD and laptop manufacturing companies.

Quote from: davidm on January 13, 2024, 15:21:10and have a substantial impact on performance.

They really don't. Intel with slower RAM is still equal or faster so that says enough. I mean:

"During an interview with PCWorld at the event, Donny Woligroski, the Senior Processor Technical Marketing Manager at AMD, recommended pairing the APUs with dual-channel DDR5-6000 memory for the best possible performance."

Does a guy from AMD knows enough about AMD products to give their recommendation about the best performance for those products, hm?

This here are desktop CPUs in the article and for mobile CPUs 7500 is only available in handhelds, there is not a single existing AMD-based laptop with faster than 6400 (and pretty much all of them have 7500 installed but it runs at 6400). I wrote why:

Quote from: Neenyah on December 30, 2023, 19:17:42

Quote from: NikoB on December 30, 2023, 15:36:46

Quote from: Neenyah on December 28, 2023, 15:03:07

Quote from: NikoB on December 28, 2023, 12:54:46

Quote from: toNiko on December 28, 2023, 10:18:15Installed memory is actually 7500MHz, but run at 6400MHz due to platform limitation.

Lenovo marketers, as usual, lie:
www.amd.com/en/products/apu/amd-ryzen-7-7840u
Official support for 7500 has been announced.

As usual, another participant appears who is not in the subject of real hardware support.

Sleep wakeup problems of the SoC if the RAM runs at 7500. Not that you are aware of that, it's all a great conspiracy where Lenovo (and everyone else) is lying, lol.

Where do you have evidence that AMD is selling defective Zen4s, without exception?

There are already miniPCs and game consoles with Zen4 on Windows on the market, and nowhere is it written about the problems of waking up from sleep with the lpddr5 7500. Therefore, this is another post about a liar-bot.

They are not defective (but your sad excuse of a brain is); per AMD's own PCB Design & Checklist guideline the way to achieve 7500 speed is to use HDI technology in the PCB to minimise stub reflection. Quite literally no one is using that because it is very expensive; well, no one but handhelds (GPD and similar OEMs/manufacturers, for routing density - only handhelds).

Which is why we don't have a single existing laptop on the market with installed LPDDR5x 7500 that actually runs at 7500 instead of 6400. None. Zero. Running 7500 with through-hole PCBs will actually give 7500 speeds but also horrendous sleep wake up issues with every single laptop where they simply can't wake up from sleep at all without hard shutdown and almost all of them have LPDDR5x 7500 installed just like this T14 G4 here.

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Edit: I just checked prices at pcpartpicker.com for 2x16 GB DDR5; 8000 is on average precisely 2.2 times more expensive than 6000; do you get 2.2 times more CPU and system performance because of those 2000 more? No. But you get lower system stability (according to AMD).

This is disappointing. The price of memory is dropping and faster speeds don't cost much more than 6000, and have a substantial impact on performance.