για οσους ειχαν αμφιβολιες για το θορυβο, το μηχανημα ειναι σχεδον αθορυβο σε καθημερινη χρηση και μετα βιας γινεται ακουστο σε βατια χρηση.
Μονο σε εκτεταμενα τεστ με full cpu and gpu χρηση , γινεται θρυβωδες, αλλα με εναν "ευχαριστο" τροπο ... λογω του υπεργμεγεθους ανεμιστηρα και της εξυπνης σχεδιασης!
Απο
Anantech
The vast majority of the time the Mac Pro’s single fan spins at a paltry 769 RPM. At this speed the Mac Pro is virtually silent. I have a Promise Pegasus R6 Thunderbolt chassis with four 3.5” 7200 RPM hard drives inside. The Pegasus sits four feet away from my Mac Pro and at idle the hum of its drives drowns out the idle fan noise of the Mac.
Even running heavily threaded CPU benchmarks does nothing to impact fan speed. It's not until you run a prolonged workload that you can hear an increase in noise from the Mac Pro. I ran FurMark under OS X in parallel with a relatively heavy 4K render in Final Cut Pro. I was rendering a 20 minute 4K project with two effects applied across the entire timeline. The basic render used up 4 - 8 threads, while the effects ensured the compute GPU had some work to do. FurMark obviously kept the display GPU busy. After around 25% of the rendering task was complete the Mac Pro’s fan smoothly scaled up to 1400 RPM, then 1600 RPM and finally stopping at what I believe is full speed: 1900 RPM.
System noise isn’t an issue the vast majority of the time. Even if you’re running for short bursts with everything cranking away on a problem. It’s only under prolonged use of the CPU + both GPUs that the fan has to spin up this high. I quit FurMark and kept the FCP render going, which brought system power down from ~380W to ~326W. It also slowly dropped fan speed from 1900 RPM down to 1500 RPM before smoothly alternating between 1200 RPM and 1450 RPM. The way the Mac Pro’s fan ramps is actually just as important as its ability to remove heat. There are no dramatic increases in speed, just an incredibly smooth curve that the Pro’s fan moves up and down.
The system never gets annoyingly loud, it just varies between silent and calmly reminding you that there’s a large fan inside. Even at full bore the Mac Pro’s fan noise is more pleasant than harsh. It’s not magic, just good system design coupled with the fact that even with a pair of D700s Apple went a bit conservative on GPU speed. Had this been a system capable of pulling 800W at the wall, we’d be having a different discussion about noise.
