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  • New DDR5 SDRAM standard supports double the bandwidth of DDR4

    flyway said:
    GPUs such as the AMD Radeon Pro 5500M use GDDR6 and the 5600M uses HBM2 in the 16" MacBook Pro.
    Is DDR5 mainly for the CPU and how does it compare to GDDR6 and HBM2?
    It depends on how many channels of each memory.

    2 channels of DDR4: 50 GB/s
    2 channels of DDR5: 100 GB/s
    2 channels of GDDR6: 250 GB/s
    2 channels of HBM2: 1000 GB/s

    DDR5 is for system or main memory for PCs, servers and such, but it usually comes down to cost. If HBM was cheap, there would be systems using it for main memory, but it is two expensive to be used as system memory for a regular PC. It will be interesting if Apple uses it as main memory for high end Apple Silicon Macs though. I'm almost half expecting it.

    There are latency differences that can sway usage of one type of RAM over the other depending on primary application as well.
  • Apple transition to own ARM chips in Macs rumored to start at WWDC

    hypoluxa said:
    Doesn't Apple have licensing issues with Intel & USB that it has to sort out? Will that affect future Macs with ARM? Or is it all a moot point now?
    No issues. Intel has made TB3 free if they need to use it, USB4 is basically a superset of TB3 and it is a formal standards body, not a propriety solution, open to all. All Macs will be moving to USB4 regardless of whether they use Intel or ARM processors.
  • Apple engineers reveal how they prevent Mac Pro overheating

    GG1 said:
    This is probably the most interesting article AI has ever published.  Fascinating. 

    And to state the obvious SOMEONE has to pay for all those man-years of research.  The $5K price is not all profit. 
    sjworld said:
    It’s air cooled. This machine is very much likely to start thermal throttling once it reaches 80C during heavy workloads.
    I doubt Apple will reveal the upper limit of thermal capacity of this design, but there must be MUCH design margin after Apple admitted this shortcoming in the previous Mac Pro design.

    Can anybody estimate how much of the 1400 Watt power supply can actually be in use with all options and RAM installed?

    But a technical deep dive (from Apple) would be fascinating.

    Edit: grammar
    Apple says:

    Power Supply

    1.4 kilowatts

    • Maximum continuous power:
      • 1280W at 108–125V or 220–240V
      • 1180W at 100–107V

    Electrical and Operating Requirements

    • Line voltage: 100–125V AC at 12A; 220–240V AC at 6A
    • Frequency: 50Hz to 60Hz, single phase
    • Operating temperature: 50° to 95° F (10° to 35° C)
    • Storage temperature: –40° to 116° F (–40° to 47° C)
    • Relative humidity: 5% to 95% noncondensing
    • Maximum altitude: tested up to 16,400 feet (5000 meters)

    If these parameter ranges are square, the design case is running the machine at 16,500 ft altitude at ambient temperature of 95 °F with a sustained power delivery of 1280W. The dual Vega II card looks like it can hit about 470 Watts, and the Xeon CPUs have TDP of 205 W. 12 banks of RAM is probably less than 50 W. 1280W is just squeaking the maximum power consumption of the components. Cooling-wise, it will be dependent on the upper limit on how fast the fans can spin. If they designed it right, it will be fast enough to remove 1400 W of heat at 95 °F at 16400 feet altitude.

    It’s a bit esoteric though as it is pathological to max out both the CPUs and GPUs at the same time. The machine isn’t limited by thermals. They choose to design it for the typical 110 V 12 A circuit that are in the vast majority of places in the world. So it is limited by the typical power circuits in buildings. Higher power will mean some places will have to add higher power circuits, like the ones for a dryer or an oven. Then if you think about it, you do not want anymore than that for a machine that is on your desktop or desk side. It’ll heat up the room and you’ll need to have some consideration for the air conditioning the room.
  • First look: Mac Pro and Apple Pro Display XDR [u]

    Prousty said:
    First post with a question that I cannot find the answer to - or find any reviewer that is even asking the question.

    Given that the new Mac Pro is using Xeon processors, why is there no second slot for dual processors? or more processors? the machine seems to be skewed towards multiple graphics cards - but suppose you wanted maximum cpu power but relatively basic graphics?

    Just an idle question - the machine is well outside my price range.
    Intel has segmented its Xeon branded processors even more so than its Core branded processors. The multisocket Xeons, “a second slot for dual processors”, are branded as Xeon SP, scalable processors, that come with metal suffix name sub brands. (Gold, Silver, Platinum, etc). 

    Unfortunately, these are really low GHz, high core count processors, really meant for servers. A big part of the desktop or workstation experience is it being fast. The low GHz, the single thread experience is a big part of this. There were only 2 Xeon SP processors that were suitable for desktop systems. 

    Towards this end, Intel created the Xeon W, “W” for workstation, line which has the high GHz, single thread performance for desktop systems. These are only 1 socket systems though. 

    Apple could create a 2 socket, or even 8 socket, Xeon SP system, but the market that wants that many cores on a desktop gets ever smaller. At same point, the buyer would just have a rack in a server room. 
  • ARM Mac Pro coming sooner rather than later, says Jean-Louis Gassee

    knowitall said:
    tht said:
    knowitall said:
    Very interesting, nice info.
    Is Gassee former Apple?
    JLG is indeed ex-Apple, in the late 80s and early 90s, but he doesnotknowitall, knowitall. He doesn’t have any real sources inside Apple nor its supply chain, and is just shooting the breeze here.
    I thought so, but thanks for the confirmation.
    I have seen him at an Apple session in Amsterdam.
    I know its someone with software expertise, one of the best I think.
    JLG has pretty storied history vis a vis Apple. He was the guy that guided the features of Apple Macs post Steve Jobs starting in 1985. The Mac II, IIci, IIfx, all that Mac hardware of that era, etc, were his babies. He left Apple to form Be, Inc and push super threaded BeOS in 90s, which was the OS Apple was going to buy before deciding on NeXTSTEP. They thought they had Apple by the huevos and was pushing for a higher buyout, but Apple bought NeXT instead.

    After that, he tried to push BeOS as an alternative PC operating system. Obviously that failed as you have to have MS Office to be successful as a PC operating system, or be free like Linux or Unix is. Tried their hand at being an Internet Appliance operating system after that, obviously failed. After that, Palm bought them out and BeOS tech was going to be in the next gen PalmOS, but they could never pull legacy PalmOS apps along, and was never able to get any OEMs to license PalmOS Cobalt. I’m guessing Rubenstein didn’t like it because Palm didn’t use it for webOS. It died inside Palm, or maybe I should say lies dormant in the Chinese company that bought Palm, Access. 

    Palm was basically the poster child of making the mistake of following pundit-class advice. They did everything that people were advising Apple to do: allow Palm clones, license the software, split up the company to be a separate hardware and software companies, find a buyer, who knows what else.
  • Apple execs say iPadOS 15 helps users to multitask with UI changes

    neilm said:
    I wish multitasking on my iPad Pro could be turned off. I’ve never once wanted it —have a Mac for that —but every now and again I fat finger something and it gets accidentally invoked in the most annoying fashion. The worst is split-screening Safari, which completely screws up whatever I was doing.
    Amen to that—thought it was just me. I can’t do a leisurely scroll though my AppleNews+ feed without inadvertently invoking pop-ups, slide-ins, and other annoyances that defy my efforts to dismiss them. I have to quit the app sometimes in order to get rid of them. At very least they could put a little X in the corner to dismiss. Need a “classic mode” for those who like unitasking. 
    Settings --> Home Screen & Dock --> Multitasking 

    Two different settings: Allow Multiple Apps and Gestures. Just turn them off.
    williamlondonapplguyalexonlineneilmrobin huberStrangeDayskiltedgreenfastasleepFileMakerFeller
  • Apple A14 Bionic announcement hints at 'iPhone 12' performance

    Apple says the A14 Bionic is a 6-core chip that features a 30% boost to CPU performance, and sports a new four-core graphics architecture for a 30% faster graphics boost. That is, however, compared to the previous A12 Bionic included in the iPad Air 3.

    Apple is saying the A14 in the iPad Air 4 is 40% faster in CPU, 30% faster in GPU and 100% faster in neural versus the A12 in the iPad Air 3. If that is an average increase, than the A14 would score about 1540 in GB5 single, 4000 in GB5 multi, and 6000 in GB5 Metal. Those are awesome scores for this machine.

    For comparison, the A13 is 1330, 3360, and 6400 in GB5 single, multi and Metal. The Core i9-10910 in the iMac 5K, the 10-core, scores about 1300 and 9500 in GB5 single and mutli-core. CPU-wise, the iPad Air is an awesome value at its price point.

    The GPU score though, is rather mysterious. It's no faster than the A13 in Metal. It's actually a regression. Maybe Apple downclocked the GPU for segmentation? There aren't any technical reasons why it would be slower than the A13.

  • Apple A14 in 'iPhone 12' said to be as fast as the iPad Pro

    rob53 said:
    What about GPU performance? Is it good enough for an ARM Mac?
    They won't be using the phone SoC in a Mac. They might use an iPad Pro SoC in a Mac. If this follows the typical pattern of AX processors in iPad Pros relative to A processors in iPhones, you can multiply the single core score by 1.1x, the multi-core score by 1.5x, and the GPU compute score by 2x.

    That is more than good enough for Macs, with the necessary modifications. It needs to support 16 GB to 128 GB RAM, 4 to 8 TB of storage, and have 24 lanes of PCIe 3 or 16 lanes of PCIe 4. The CPU performance is more than good enough for all Apple laptops and desktops. Look at the single core score. That's i9-9900K territory in a phone. Give it 4 to 16 CPU cores, it can be used in the entire Mac desktop lineup, except for the Mac Pro, in which case, there needs to be a 32 core model and 1 TB memory support. The higher end laptops and desktops will use discrete GPUs, hence the need for PCIe, just like it is today.

    If the single core score is true, that is the single core performance of Intel and AMD top end desktop processors in a phone. If it is true.
  • Microsoft compares Surface Laptop 4 to MacBook Air in new ad

    As my wife found out, you still need a dock or dongle with a Surface Laptop for desktop duty. Her work provided her a Surface Laptop, wireless radio keyboard, wireless radio mouse, an external 27" display and the Surface Dock+Power brick. Two peripherals that use USBA and the monitor only has HDMI or VGA input. Even with the Surface Dock, we still needed a dongle as the Surface Dock we have only has mini Display Port for video out.

    Now, we just need to figure why the Surface Laptop doesn't recognize the external monitor after unplugging it from the dock and plugging it back in. We have to unplug the HDMI cable from the monitor and plug it back in to get it to recognize the external display. There is a miniDP-to-HDMI dongle for it. Maybe a single miniDP-to-HDMI cable is better.

    The Surface Laptop port situation really isn't much better than the M1 Macs. Meh, the port situation isn't a big deal.
  • Apple executives detail 24-inch iMac design, features in new interview

    Apple worldwide senior produce marketing manager Colleen Novielli
    Ms. Novielli doesn't market literal apples.