I would have just stuck to music production forums to get the answers if I'd known it was necessary to explain the importance of ambient noise in a mastering studio or monitor control room.
Heh. Indeed.
This is an issue I have but not related to noise but to computer performance.
Would like to have an i5 and i7, comparably configure, side by side to do a " for me " real world comparison.
I had the 2017 i7 iMac in my house. Aside from the GPU, they were identically configured, with 1 TB SSD. I returned it because of the noise. I had an 2010 iMac i7 870 before that and while it did become audible under 100% load, it took far, far longer to go to max fan. The i7 7700K iMac is very quick to go to max fan.
What if your work requires the i7 and you care about noise? All of a sudden noise is not an issue.
You buy an i7 if you NEED the i7 ....... noise is not a consideration when selecting the right tool for the job.
I have a mid-2011 27" iMac with the i7 ....... I use the i7, so the i5 is not a viable option for me.
See above. I had the 2010 27" iMac with the i7 before. I too though that because I sometimes doing video encoding, I definitely wanted the i7-7700K. So I bought it.
Then I realized I'd prefer a 12.5 minute silent encode (i5) over a 10 minute encode where the fan is at maximum for 9.5 minutes (i7).
Fan noise for me has ALWAYS been a consideration when I buy my computers. It's not the only factor or even the main factor, but it is significant factor. Luckily for me though, I don't need the i7 all day long. That performance is just very nice to have when video encoding and such.
YMMV.
P.S. I've said before, if you absolutely need more than 2017 i5 performance and want a quiet iMac, then for some people it may make sense to wait another year for the 2018 i5 iMac, because 6-core i5 iMacs will likely be out then. This would be an ideal iMac for many audio types.
In fact, that was what I had wanted to do myself, but couldn't because for more mundane reasons I was forced to buy this fiscal year.
Not exactly that simple. I care about, and am very sensitive to noise. It also depends a lot on how you're using the machine. I've been using my i7 4.2GHz for a month and a half now and can count how many times I've actually heard the fans on two hands. For example, recently they briefly ramped up during the Sierra 10.12.16 update. It's so rare that I notice when it occurs and I'm often using this machine in a room with ambient temperatures of up to 32°C.
Also, the fans on the 2017 iMac are also not as loud as on the Late 2013 that preceded it.
If you're doing seriously processor intensive work that gets the fans spinning then yes, you might be bothered with the fan noise. Then again, if its for a business purpose the tradeoff of extra noise for extra speed might actually be worth it.
Most of the time the i7 was quiet, and yes it depends on your usage pattern. But what really struck me after a week of usage was that any sort of processor intensive usage for longer than say 20 seconds could get the fan going. This was a big change from my 2010 i7. With the 2010 i7 with my regular usage it was quiet 99.9% of the time. With a maxed out CPU it would max out the fan after a few minutes, but that was OK.
With the i7-7700K the core temps spiked up and down and even just heavier usage in Photos and apps like that could get the fan going. I tried to tell myself it was OK, but after a while I just realized I wanted it to behave more like my 2010 i7 in terms of noise, or else better than that. The 2017 i5 is much better than the 2010 i7 in terms of noise behaviour, but 2017 i7 was noticeably worse. If the 2017 i7 had been like the 2010 i7, I would have kept it.
Ironically, the 2010 i7 is rated at 95 Watt TDP, but the 2017 i7 is rated at 91 W TDP, but it would seem the rating doesn't reflect the real-world behaviour. BTW, this is not just noted by us. The PC geeks are saying the same thing. The 7700K runs quite hot under load, and is much quicker to hit those high hot temps than most older mainstream i7 chips.