News:

Willkommen im Notebookcheck.com Forum! Hier können sie über alle unsere Artikel und allgemein über Notebook relevante Dinge disuktieren. Viel Spass!

Main Menu

Post reply

The message has the following error or errors that must be corrected before continuing:
Warning: this topic has not been posted in for at least 120 days.
Unless you're sure you want to reply, please consider starting a new topic.
Other options
Verification:
Please leave this box empty:

Shortcuts: ALT+S post or ALT+P preview

Topic summary

Posted by Theodoros
 - July 02, 2019, 09:27:44
Hello. I just received the 2019 15" macbook pro with i7 2.6Ghz. The first run of cinebench is normal. The power is ~47 watts, the clock speed ~3.3Ghz and the temperature ~97C with score ~2500.
imgur.com/a/4laB5xM

After 2-3 cinebench r20 runs, it decreases the power to 30-35 watts, the clock speed to ~2.6-2.7Ghz and the temperature is 83-85 C with score ~2200. Is this normal?
imgur.com/a/4TEMw12
Posted by dellsan
 - June 16, 2019, 13:25:28
Quote from: Andreas Osthoff on June 15, 2019, 21:44:07
Prime95 is basically a worst-case scenario and even more stressful than Cinebench, so the clocks will be a bit lower. With this in mind and the mediocre results we got from our unit, it is not surprising that the i7 in the MBP 15 drops below its base frequency.

Over on reddit someone mentioned that its due to the AVX instructions in Prime95 and that intel introduced "dynamic frequency scaling" anytime AVX instructions are used to keep power in check.

I may give volta a try to see if it will work with my mac, but I doubt it.
Posted by Andreas Osthoff
 - June 15, 2019, 21:44:07
Prime95 is basically a worst-case scenario and even more stressful than Cinebench, so the clocks will be a bit lower. With this in mind and the mediocre results we got from our unit, it is not surprising that the i7 in the MBP 15 drops below its base frequency.
Posted by dellsan
 - June 15, 2019, 18:43:15
I just received my brand new i7 2.6ghz 2019 MBP a few days ago. After running a mid-2012 15" MBP for 7 years, this new machine is a dream to use.

A friend of mine suggested I run some stress tests to ensure that everything works as it should. Rather than go with the typical Cinebench runs, I opted to run a torture test with Prime95 to really push the CPU. I ran the max cpu/max heat stress test.  (Found under "Options --> Torture Test")

Surprisingly, after a few seconds my CPU falls under the base clock and hovers around 2.4ghz @ ~98C and never reaches base clock during the test.

I was wondering if anyone with a similar machine would be willing to run the same test to see if this performance is specific to my machine  or is generally applicable? Furthermore, do you think that using Cinebench to stress-test the CPU underestimates potential throttling compared to Prime95?

Thanks!

(p.s i would have liked to post the screenshots, but my post count is too low to allow links)
Posted by MacUser20007
 - June 15, 2019, 00:57:13
Has anyone seen any other test of the 6 core?  Or any other tests of whether 8-core units bought in stores are actually undervolted?

If yes,please post links here. We need more info and more tests.

If the store bought 8 cores are not undervolted, then the positive reviews are inaccurate and are hiding a sizable issue.
Posted by freebil
 - June 13, 2019, 20:41:32
What about the idle temperature? Is the same as the 2018 mpbs or lower?
Posted by Not_anton
 - June 13, 2019, 08:13:02
Macbooks have two 8-core processors, and LTT who reported undervolting with great performance were using the most expensive option.

I guess the base 8-core would work just as bad as your 6-core.
Posted by Ryan
 - June 13, 2019, 01:13:09
Excellent job!! Thanks for the report. I miss the good old days when apple products were no-brainier.
Posted by Redaktion
 - June 12, 2019, 22:57:43
It seems the new processors in the MacBook Pro 15, including the optional 8-core chips are working better than expected, at least according to initial reports. We have a sample of the entry-level SKU with the Core i7-9750H and cannot share this optimism.

https://www.notebookcheck.net/Apple-MBP-15-2019-i7-disappoints-in-review-is-Apple-using-selected-test-samples.423827.0.html