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Posted by power efficiency

- December 10, 2025, 09:32:09

The power consumption of INTEL CPUs is already so high (300+ Watt in desktop PCs) and at its maximum in laptops as well, so the elephant in the room question is: How much will the power efficiency have improved? That's why AMD Epyc is gaining server market share: They are much more power efficient.

Posted by Alpha_Lyrae

- December 10, 2025, 03:47:16

Quote from: Terror Byte on December 10, 2025, 00:50:42
Quote from: ArsLoginName on December 10, 2025, 00:29:39'...beats the Max+ 395..." Single core 3057/2929 =1.0437 or by 4.3% coming out 1 year later and manufactured on more advanced nodes. Wow. Shocking.... As for multi-core the 388H gets 17687 while Ryzen Max+ 395 has 19000.... So it loses by 7% but that is to be expected since it only has about 14 cores as the 4 LPE probably count as 2 cores or so....

Single core performance is mainly about clock speeds. This Panther Lake looks like it will perform very well at much lower total power draw than Max 390/395/285HX and should only really be compared to 285H or 370.

I'll bet it trashes both the current Intel and AMD on efficiency too.

It's not always about clock speed. Improving IPC will also improve single core performance at the same clocks. Apple's relatively wide front-end is pretty good at that, so it doesn't need high clocks. x86 designs are moving in that direction too, but only insomuch as the wider execution units can remain fed. If they're sitting halfway idle under load, that's a bad design that has a bottleneck elsewhere in the architecture.

Pushing higher clocks with narrower execution units is a tried and true approach, but even that requires some clever design tricks to scale performance up.

Posted by Terror Byte

- December 10, 2025, 00:50:42

Quote from: ArsLoginName on December 10, 2025, 00:29:39'...beats the Max+ 395..." Single core 3057/2929 =1.0437 or by 4.3% coming out 1 year later and manufactured on more advanced nodes. Wow. Shocking.... As for multi-core the 388H gets 17687 while Ryzen Max+ 395 has 19000.... So it loses by 7% but that is to be expected since it only has about 14 cores as the 4 LPE probably count as 2 cores or so....

Single core performance is mainly about clock speeds. This Panther Lake looks like it will perform very well at much lower total power draw than Max 390/395/285HX and should only really be compared to 285H or 370.

I'll bet it trashes both the current Intel and AMD on efficiency too.

Posted by ArsLoginName

- December 10, 2025, 00:29:39

'...beats the Max+ 395..." Single core 3057/2929 =1.0437 or by 4.3% coming out 1 year later and manufactured on more advanced nodes. Wow. Shocking.... As for multi-core the 388H gets 17687 while Ryzen Max+ 395 has 19000.... So it loses by 7% but that is to be expected since it only has about 14 cores as the 4 LPE probably count as 2 cores or so....

Posted by A

- December 09, 2025, 22:40:02

Quote from: davidm on December 09, 2025, 20:18:38We need to know the memory speed. Fast memory is a big part of why Macs have been ahead of mainstream PCs for so long, and four channel RAM is why Strix Halo is so fast for GPU and general operations, relatively speaking (it's actually midrange fast compared to the Macs).

Does it matter? With modern memory prices and still going up, this generation is a wash. Hopefully prices will go down by the time Medusa Halo is out.

Posted by davidm

- December 09, 2025, 20:18:38

We need to know the memory speed. Fast memory is a big part of why Macs have been ahead of mainstream PCs for so long, and four channel RAM is why Strix Halo is so fast for GPU and general operations, relatively speaking (it's actually midrange fast compared to the Macs).

Posted by Redaktion

- December 09, 2025, 19:27:31

Intel's upcoming Core Ultra X9 388H has passed through Geekbench on its way to being released. Sporting 16 cores and an Arc B390 iGPU, the Panther Lake part is already giving the Core Ultra 9 285HX and Ryzen AI Max+ 395 a run for their money even at this early stage.

https://www.notebookcheck.net/Intel-Core-Ultra-X9-388H-pushes-Core-Ultra-9-285HX-and-Ryzen-AI-Max-395-in-early-results-with-new-Arc-B390.1181609.0.html

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