Apple like many computer and appliance makers revise their devices over the course of the lifecycle.
In the case for Apple they tend to do so to improve performance; whereas, other vendors due it to cut costs.
Compare the performance of supposedly identical spec nMP models from 2013~14 to those from mid 2015~17
The local SSD is MUCH faster, by at least 400MBytes/sec for both read/write.
The D700s, at least in my benchmarks are about 5~10% faster
Now compare the internals:
You'll notice the boards are look a bit different as well.
Unfortunately, Apple does ZERO promotion aimed at the tech savvy or creative.
Thus most falsely believe the nMP has remained unchanged since 2013.
And many nMP buyers thought D300s were acceptable options.
In reality, D300s are as detrimental to creative pros as a 5400RPM HDD is to casual iMac users.
Apple should just stop the nonsense of even offering these incredibly bad options.
And a GPU upgrade program would resolve a lot of nMP headaches.
But all this is academic.
Unfortunately, Apple fan speeds in general are often 30-100% lower then they should be.
AND Apple STILL appears to use the same poor thermal paste - turns into more of an insulator
But this effects all Macs - and Dell uses the same junk compound
Here's my recipe to basically never have hardware problems/glitches on nMP
- Replace the CPU/GPU thermal compound w/ arctic silver
- Lay nMP on its side in a cradle,
- Point a small fan at the "bottom" - Vornado Zippy is great and rather quiet
- Install smcFanControl
- Create at least two fan control profiles: 1300RPM for casual use, 1800RPM for full loads
The above may be applied to most Macs w/ position changes to step #2 and RPM settings in step #5
For example, MBP laptops pretending to be workstations:
Take the bottom panel off, put it in a vertical stand, and point a fan at it.
For iMacs there is an additional step: Don't turn up brightness past 10 bars.
Running iMacs near or at full brightness pumps out a ton of heat and reduces performance.
From my use of monitor calibration scopes, I find most Mac displays are best between 8 to 9 bars.
Windows devices are not immune to major problems - especially thermal issues.
In the last 15 years I have yet to see a Dell non-server product not designed to fail.