Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd Deal Finder...
Buy other stuff at Amazon.com...
Up to 1527MB/s sustained performance
Handpicked deals...
$50 $50
SAVE $0

$1480 $1230
SAVE $250

$3999 $2499
SAVE $1500

$1498 $1098
SAVE $400

$2897 $1797
SAVE $1100

$399 $349
SAVE $50

$899 $699
SAVE $200

$3297 $1897
SAVE $1400

$749 $499
SAVE $250

$799 $567
SAVE $232

$870 $749
SAVE $121

$3499 $2199
SAVE $1300

$3599 $2299
SAVE $1300

$4499 $2650
SAVE $1849

$748 $598
SAVE $150

$899 $699
SAVE $200

$799 $729
SAVE $70

$3599 $2299
SAVE $1300

$3499 $2199
SAVE $1300

$4499 $2650
SAVE $1849

$1997 $897
SAVE $1100

$3099 $2499
SAVE $600

$2799 $2199
SAVE $600

$4999 $4599
SAVE $400

$4499 $2650
SAVE $1849

Save Big $$$$ on Memory for 2019 Mac Pro

Up to 65% better pricing than Apple

Lloyd recommends 32GB RDIMM modules for most users (more expensive LRDIMMS are for 512GB or more).


iMac 5K: Heat and Fan under Heavy CPU/GPU Usage

Last updated 2014-11-02 - Send Feedback
Related: 4K and 5K displays, computer display, GPU, iMac, iMac 5K, Macs, video

The diglloydTools MemoryTester 'stress' command was used to place a maximal CPU load on the iMac 5K, as shown. After running for some time, the fan ran at moderate speed and with modest noise—not objectionable.

Leaving the stress test running but renicing it to a lower priority, the GPU-intensive Unigine Valley demo was run continuously*. Simultaneous full CPU load and the high GPU load increased fan noice noticeably, but the volume remained reasonable and tolerable.

The hot air coming out of the rear of the iMac was considerable, making a very good hand warmer. GPU temperatures stabilized at ~103°C / 217° F, which is hot enough to boil water even at sea level, but MPG cannot speak to whether this is “too hot” or not in terms of as-designed temperatures and/or longevity.

Note that internal dust buildup over time could making cooling in the tightly constrained and inaccessible interior a concern—a layer of dust kills electronics.

* Unfortunately Unigine Valley supports only half-res of 2560 X 1440, not the full 5120 X 2880 resolution of the iMac 5K).

Cick for larger screen shot.

iMac 5K running 'mt stress' (MemoryTester)
New Mac Pro?

Or iMac 5K or iMac Pro?
Consult with Lloyd ASAP before buying!


System configuration for CPU, GPU, memory, SSD, backup, RAID, optimizing performance, workflow.
For YOUR optimal workflow

Avoid costly mistakes in throwing money at the problem for less performance and/or buying the wrong machine for your own needs!

Remote screen sharing available for RAID, software configuration, etc.

More about 2019 Mac Pro vs iMac 5K vs iMac Pro...

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__