All Posts by Date or last 15, 30, 90 or 180 days.
also by Lloyd: diglloyd.com photography and WindInMyFace.com
Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd B&H Deal Finder...
Buy other stuff at Amazon.com...
Upgrade the memory of your 2018 Mac mini up to 64GB
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$147 $80
SAVE $67

$260 $130
SAVE $130

$48 $28
SAVE $20

$580 $320
SAVE $260

$1699 $1199
SAVE $500

$799 $299
SAVE $500

$15199 $13699
SAVE $1500

$7995 $7495
SAVE $500

$1399 $1049
SAVE $350

$1299 $1099
SAVE $200

$700 $500
SAVE $200

$764 $399
SAVE $365

$290 $250
SAVE $40

$169 $99
SAVE $70

$370 $300
SAVE $70

$200 $170
SAVE $30

$250 $235
SAVE $15

$3899 $3699
SAVE $200

$2799 $2499
SAVE $300

$1199 $999
SAVE $200

$2999 $2399
SAVE $600

$18599 $17099
SAVE $1500

$600 $450
SAVE $150

$1149 $799
SAVE $350

$420 $170
SAVE $250

$1499 $649
SAVE $850

$1499 $649
SAVE $850

$420 $170
SAVE $250

$369 $239
SAVE $130

$1699 $1399
SAVE $300

$1498 $998
SAVE $500

$999 $949
SAVE $50

$1099 $999
SAVE $100

OWC Envoy Pro EX SSD
Blazingly fast Thunderbolt 3 SSD!

Up to 4TB capacity, USB-C compatible.

USB-C model also available


Great for travel or for desktop!

Deducing GPU Usage for Final Cut Pro and Compressor by Watts

I wanted to find some supportive evidence that the GPUs were being used for video transcoding, given that Final Cut Pro and Compressor both use nearly all the CPU power. There are not tools I know of to monitor GPU usage (I tried Instruments with no luck).

So I applied a simple logic: use of GPUs should increase the power draw.

Using a Watt’s Up AC power meter, I measured the power draw in watts of the 2013 Mac Pro (8-core 3.3 GHz, D700 GPUs).

MemoryTester 'stress'*: ~ 240 watts (800% CPU usage)

Compressor transcoding to mp4: ~ 195 watts (670% CPU usage)

Final Cut Pro transcoding to mp4: ~ 290 watts (800% CPU usage)

FCP + Unigine Valley render: ~ 380 watts (800% CPU usage)

* Using the MemoryTester 'stress' command of diglloydTools

Notes:

  • The power draw while using Compressor suggests no GPU usage, since it uses most of the CPUs yet draws notably less power than MemoryTester (which uses no GPU). This makes no sense for Compressor given its nature, but that’s the implication.
  • The Final Cut Pro power draw is significantly higher than with just CPU usage alone, suggesting that GPU usage is employed by FCP.
  • Transcoding in FCP while simultaneously running Unigine Valley render (video fly-thru) becomes slightly jerky, but pushes the power draw up substantially, suggesting that GPU capacity is underutilized by FCP, or simply that some capabilities are inapplicable to transcoding.

There is a lot of hot air coming out the top of the 2013 Mac Pro in the simultaneous FCP + Unigine Valley render!

Fabio I writes:

Why don't simply use iStat Menus to watch GPU current drawing (in Amps) and cores temperature? You could set these values (among others, the same about CPUs for example) on the top screen bar.

MPG: total power draw is one easy number. But this is a very good idea to look at to see if one or two GPUs are being used.

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).


OWC Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.


Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!

Save the tax, we pay you back, instantly!
View all handpicked deals...

Peak Design Everyday Backpack (20L, Heritage Tan)
$260 $130
SAVE $130

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2020 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__