![]() Internal management of the Intel chip may then take over what is not in Apple's control, given the hardware conditions and designs chosen. In this case it seems that the task is single-threaded and pretty taxing for the one core that has to handle this. All this can then be amplified by a bug in the software to run. Not only the machines are new, so is the OS Mojave. The i9 MacBook Pros were known to provide strange behaviour due to potentially high power consumption, temperature but not performance output, throttling. There are a few variables of unknown quality and quantity. Also because there might be a different solution to it other than changing the frequency manually, especially if this is impossible to do. I am not sure about what is happening here, which is the reason I give longer description of the problem. Increasing the process' priority did not make a change. My suspicion is on OS, since CPU does not even reach to throttle and there is a clear process preference. I am absolutely sure the system could support higher CPU frequency during this, but it does not go for it. Mathematica task is long but does not change in nature, it multiplies big matrices over and over again just with different numbers.Īll of this is followed with fans running on higher than default speeds, because I increase them with the Control tool. It's like the OS does not allow higher CPU frequency for the "dangerous" thread, although the temperature can decrease eventually to <50C. Also the total core power increases, but only while this second process is running, as if the Mathematica process is forbidden to use CPU on higher clock. ![]() However, if I run another application on the side, the Intel Power Gadget can read higher core frequency (it shows just the average or the maximum, not per core/thread). After some more time (5-10 minutes) it will underclock for the second time, although the temperature is stable. The temperature reduces to ~60C, but until the end of computation this process never gets higher CPU nor Turbo Boost. ![]() The average temperature is probably 80C, but with Turbo Boost adjusting the clock, at some point temperature touches 100C and the CPU gets underclocked. At the start of computation the Turbo Boost is acting, the clock speed is higher and then after about a minute it abruptly reduces, simultaneously after the CPU temperature touches 100C. This might be Mathematica related, but so far I see no reason for underclocking so heavily. While running some specific calculations in Mathematica it happens that the CPU gets underclocked from 2.9G to 2.3G in serial and even to 1.5G during parallel computations. I use Intel Power Gadget and Macs Fan Control tools for monitoring the CPU and fans speeds on MacBook Pro 2018 with i9. Is this possible on new MacBooks and macOS ? media.6wbh8 liked 3-In-1 Desktop, CNC and Laser Engraver.I would like to have any direct control of CPU core clocks.bossesand liked The Ultimate Game & Watch.bossesand wrote a comment on The Ultimate Game & Watch.thunderlord123 wrote a comment on Flipper At Home.Norbert Heinz has added a new log for mail2code.3012465548 liked Nuclear Magnetic Resonance for Everyone.Andrew on The Glitch That Brought Down Japan’s Lunar Lander.Nick 2 on ADATA SSD Gets Liquid Cooling, But Not Everyone’s Convinced.Eric on C64 Gets ChatGPT Access Via BBS.snek on The Glitch That Brought Down Japan’s Lunar Lander.Mark Morgan Lloyd on A Fresnel Lens Without The Pain.Andrew on The Most Ornate Birdbath You’ve Ever Seen.Jan on The Most Ornate Birdbath You’ve Ever Seen.Posted in clock hacks, Mac Hacks Tagged arduino, chronodot, DS3231, mac mini, MAX7219 Post navigationīooks You Should Read: Red Team Blues 12 Comments See a demo clip embedded after the break. There’s even an ambient light sensor which adjusts the LED intensity to make this readable in direct sun, or the dark of night. An Arduino ties the whole system together with a Chonodot for accurate time keeping. The display uses two MAX7219 LED drivers to control the grid which is build on a big hunk of protoboard. If we’re doing this right, the time seen above is 10:23:42 PM on April 28th, 2012. The white LEDs below the date act as a digital pendulum, scrolling left and right as the seconds tick by. To the right is AM/PM, with minutes and seconds in increments of one. On the left is hours, then minutes and seconds in increments of five. ![]() ![]() The face has been divided up into two columns. But since the case designs on Apple products are half the reason to buy them, he decided to reuse the enclosure by turning it into this clock ( translated).Īs with the binary clock we saw yesterday, this one uses a bunch of LEDs to display the time, but it does it in a way that’s a bit more readable if you know what you’re looking for. ![]()
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