Earlier quoted context omitted.
Intel famously followed a "tik-tock" development cycle where they would move their existing designs to their next gen fabs, before updating the design. So yes, you absolutely can separate them, and that's how it was historically done. Though Intel fell behind on this philosophy.
And those transitions were not seamless. Intel controlled the whole stack so they made it seem like it was. You obviously can’t separate design and manufacture at this level and scale, to even suggest it displays a massive lack of understanding of how this space operates. If you don’t know how the space operates, why are you commenting?
Alder Lake Core i9 processor is faster than the M1 Max
351–360 of 368 posts
Re: Alder Lake Core i9 processor is faster than the M1 Max
#352Quoted post unavailable.
We've banned this account for repeatedly breaking the site guidelines. Please see https://news.ycombinator.com/item?id=30106519.
(I'm just posting this here to increase the odds that you see this, since the comment I replied to at that link is already a few days old.)
Re: Alder Lake Core i9 processor is faster than the M1 Max
#353Earlier quoted context omitted.
It's really the cost of capability and addons, I'm not sure about that MSI model but you're able to get a ton of storage and a good gpu for under what apple charges if you want one or two tb of storage and decent ram you're looking at $3,000+ after taxes
I think this still ties in to the point. People laugh at the apple user mentality of “I just know it’s going to work if I buy Apple”. But then you have windows OEMs where you have to do careful research because the product line is full of scams and traps.
that's true for all products these days, including apples
Re: Alder Lake Core i9 processor is faster than the M1 Max
#354Earlier quoted context omitted.
I don’t think this is going to happen, but: It would be extremely funny if Apple strapped a heavy copper heatsink and a turbo fan to an M1 and just overclocked the ever-lasting crap out of it. The crazy thing about using a Macbook Pro (with an M1 Pro or M1 Max CPU) is that, in single-threaded performance, it's really no faster than a dippy little Macbook Air. And at the end of the day, single-thread performance is mo…
copper body macbook pro?
>copper body macbook pro?
Apple Marketing: This year Apple is going green in an all new way!
Re: Alder Lake Core i9 processor is faster than the M1 Max
#355Earlier quoted context omitted.
> Decoders on Arm are definitely parallel (= don't have more serial logic for wider decoder) compared to the variable length decode x86 is stuck with x86 decode is parallel too
It is parallel in the sense that you can decode 4-6 instructions in parallel, yes. It is not parallel in the sense that variable length decoding requires each of your decoders to talk to the other ones to coordinate on instruction length boundaries, which means there is going to be a lot of serial logic in your decoder circuit.
It doesn't, if your L1$ predecodes at fill time and stores instruction length.
Something, somewhere does have to do a serial length decoding of course. But when you look at the L2 access latency and throughput (which is the minimum L1 fill latency), it's clear you could afford to do that part of the decode over more cycles.
New designs are not just predecoding lengths but entire uops now into the first level instruction cache which is the same concept they just call it a L0 and L1 rather than L1 and L2.
Re: Alder Lake Core i9 processor is faster than the M1 Max
#356Earlier quoted context omitted.
We actually know very little about the clock tree; we know where the clock mux registers are but not how they connect to each other, and that's mostly about peripherals, not the CPUs. Also, the PLL registers are locked out and read only. The CPU DVFS stuff is all done automatically (you just select a performance level in one register), and I wouldn't be surprised if the underlying tables and configs for that are also…
Oh, word. Thanks for the correction. I guess I extrapolated too much from the combo of you knowing enough of the clock inputs to the peripherals to make them work and a statement of yours about finding a pll bypass signal. I want to say your main point your statements on the pll bypass was that the cores must be mainly static logic because they ran stable at whatever rate the crystal is, but I'm half remembering and…
Ah, the PLL bypass was just p-state 0, but that was still using the high level interface. macOS never uses that mode, but it's there.
Re: Alder Lake Core i9 processor is faster than the M1 Max
#357Earlier quoted context omitted.
I still maintain the M1 Max Quadro is a figment of media imagination. The M1 Max die is designed for precisely two-die usage. Not four. The IRQ controller has registers for two dies. The drivers reference two dies. The whole thing screams two dies everywhere. 4-die Apple Silicon machines will surely come, but not with the M1 Max die. It'll be a new design.
What about a dual CPU Mac Pro? Edit: thinking about this for a few more seconds, I realise this is a completely separate discussion, but I was just trying to think how Apple could accomplish the Quad branding even if internally its separate CPUs.
How would you connect the CPUs together then? There's no mechanism for that. You need a bus, IRQ routing, cache coherency, and more. Those features are there in the Max with the d2d interconnect, for up to exactly 2 dies.
Re: Alder Lake Core i9 processor is faster than the M1 Max
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Re: Alder Lake Core i9 processor is faster than the M1 Max
#359Earlier quoted context omitted.
I am sure the 40W is CPU only, excluding other part of the SoC. The M1 Max GPU alone could push to 60W.
No, they measure it at the wall minus idle usage: https://www.anandtech.com/show/17024/apple-m1-max-performanc... But you’re right that this is not with the GPU loaded.
It is measured wall minus idle usage during CPU load, which is pretty much CPU load?