Took some digging but this is what Tom's Hardware referenced. Maybe try getting icc profiles for the set Adobe RGB and run it through??
http://www.gamutvision.com
Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
iMac Late 2015 27" 5K Impressions
- Thread starter AusMacFan
- Start date
- Sort by reaction score
Took some digging but this is what Tom's Hardware referenced. Maybe try getting icc profiles for the set Adobe RGB and run it through??
http://www.gamutvision.com
Would like to know that aswell actually, is there any good reviews out yet or anyone that knows about this?
Based on you black magic scores, I am assuming Apple stuck with the same SSD and pcie interface on the fusion models....
The TS has a m395 in his. The 64,000 dollar question is how is the GPU temps and fan noise on the m395x?
Ok so out of the box, the system profile is identical to the included 'Display P3' profile. It is pretty inaccurate though, with an average delta E >3 and white point of around 7000k.
Calibrating with the i1 Profiler to D65, standard tonal response curve with gamma at 2.2 created this icc profile:
https://drive.google.com/file/d/0B2-_zCiiUdl8Zlp1QVNPc1Z1NXc/view?usp=sharing
I don't have a 2014 5k iMac and have never used one, so I can't compare the two.
The fan is silent for general use, I'm downloading bioshock infinite now to check the temps and fan noise for graphically intensive tasks.
The read/write on the Fusion Drive is quite disappointing. Normally Apple is quite accurate what they advertise on their performance, battery life and so on, but I have this feeling you will only get this speed in all SSD configuration.
Can anyone please run this speedtest with an all flash storage config?
Congratulations on your purchase. I am planning to buy one myself one of these days and going for the completely maxed out iMac 5k (without the Magic Trackpad though).
Can anyone please run this speedtest with an all flash storage config?
Congratulations on your purchase. I am planning to buy one myself one of these days and going for the completely maxed out iMac 5k (without the Magic Trackpad though).
Thanks AusMacFan!
I loaded your icc profile in the Mac's built in Colorsync Utility and compared it to sRGB, aRGB, CMYK and my current profile. The new screen is a wider gamut than my current one by a good deal. It encompasses all of sRGB and most of CMYK (the blacks/K might extend a bit outside of your profile). The aRGB comparison is interesting. I think I'm reading that aRGB extends further into the reds than your profile is able to show. I'm not sure what that might mean in terms of a color-managed workflow. The good news is that, again, the monitor is clearly better than my current 2011 iMac!
That's great to hear! I'm interested to see how other people go with backlight bleed on the new panels; if they are as bad on average as last year's models were, I will definitely be clutching on to mine for dear life rather than going up to an all ssd model.
Ok so I just tested out the GPU with bioshock infinite, game was running at 1440p high graphics preset. Performance was all over the place, averaging 60fps and above in indoor scenes, but dropping to the 40s and even as low as 35fps for more complex scenes.
The GPU temp got up to ~95 degrees. However, the fans are so quiet I could barely notice them. I gave the GPU a good chance to get hot, but according to the istat widget the fans stayed at around 1200rpm, and honestly I couldn't even tell that they were on. Perhaps the GPU wasn't pushed hard enough for the fans to kick in at full, but I don't know how this could be when it was struggling to keep the game above 50fps.
It is just the fan profile apple has used. I have been testing my m395 in bootcamp and I am getting temps up to 98c before the fans slowly revs up. The temps are then kept between 96-98c with very little noise.
My 290x in the 2014 fans would rev up much sooner and much higher
My 290x in the 2014 fans would rev up much sooner and much higher
Thanks, AusMacFan. I'm working on an analysis of your profile, including a comparison with "traditional" wide gamut displays that cover AdobeRGB. I'll update this thread with my results soon.
Anyone else has a profile for the previous 27" Retina iMac to share? I'd be great for comparison. Ideally created using i1 Profiler (i1 Display Pro or Colormunki Display), 6500K and gamma 2.2
Thanks to AusMacFan contribution, I was able to compare the new P3 iMac display to my reference Dell AdobeRGB wide gamut display. This is strictly a color gamut comparison, ignoring any other variables, like screen reflections, shadow grayscale and gradient responses, etc.
The Dell wide gamut display has stronger blues and cyans, true to its claim of 99% AdobeRGB coverage. The late 2015 27” P3 Retina iMac Display surpasses it only slightly on the magentas and reds, but is considerably larger on the green-yellow-orange parts of the spectrum.
Overall shape is very similar to the DCI P3 color space, falling a little short on the greens and blues, but actually surpassing it a bit on the purple-magenta axis.
Which color gamut one is more useful?
For video, definitely the iMac, since it corresponds closely to a video standard.
For web, both represent a real problem until all browser vendors adhere to the color management guidelines suggested by the W3C. In a nutshell, only Firefox (if properly configured) and Safari do color management right on the Mac platform. Chrome interprets ICC v2 profiles embedded in images, but fails to apply any color management to the other page elements, rendering them on the full display gamut. P3 iMac users will see oversaturated colors on Chrome, as any other wide gamut display users.
Compared to a high end inkjet on fine art baryta paper (Epson 9900 and Epson Exhibition Fiber), the P3 iMac display falls short on the blues. The Dell AdobeRGB wide gamut monitor covers almost all of the printer colors on the blue axis, but, on the other hand, fails to achieve its full gamut on the yellows and oranges.
For photographers, it’s a wash between AdobeRGB wide gamut LCDs and the new Apple P3 displays. Both represent a tangible improvement compared to traditional sRGB displays, specially for those doing fine art printing.
Keep in mind that those gamut limitations don’t necessarily represent a problem in real world usage. Color managed apps map out of gamut colors to the display gamut, keeping the overall image representation plausible and accurate.
Looking for a previous generation 27" 5K iMac ICC profile for comparison.
The Dell wide gamut display has stronger blues and cyans, true to its claim of 99% AdobeRGB coverage. The late 2015 27” P3 Retina iMac Display surpasses it only slightly on the magentas and reds, but is considerably larger on the green-yellow-orange parts of the spectrum.
Overall shape is very similar to the DCI P3 color space, falling a little short on the greens and blues, but actually surpassing it a bit on the purple-magenta axis.
Which color gamut one is more useful?
For video, definitely the iMac, since it corresponds closely to a video standard.
For web, both represent a real problem until all browser vendors adhere to the color management guidelines suggested by the W3C. In a nutshell, only Firefox (if properly configured) and Safari do color management right on the Mac platform. Chrome interprets ICC v2 profiles embedded in images, but fails to apply any color management to the other page elements, rendering them on the full display gamut. P3 iMac users will see oversaturated colors on Chrome, as any other wide gamut display users.
Compared to a high end inkjet on fine art baryta paper (Epson 9900 and Epson Exhibition Fiber), the P3 iMac display falls short on the blues. The Dell AdobeRGB wide gamut monitor covers almost all of the printer colors on the blue axis, but, on the other hand, fails to achieve its full gamut on the yellows and oranges.
For photographers, it’s a wash between AdobeRGB wide gamut LCDs and the new Apple P3 displays. Both represent a tangible improvement compared to traditional sRGB displays, specially for those doing fine art printing.
Keep in mind that those gamut limitations don’t necessarily represent a problem in real world usage. Color managed apps map out of gamut colors to the display gamut, keeping the overall image representation plausible and accurate.
Looking for a previous generation 27" 5K iMac ICC profile for comparison.
The 700mb/s of your fusion drive is exactly the same as my 2012. The new ssd is nearly three times faster at 1900mb/s. Well worth it
Thanks, eoren1. Do you mind sharing your profile ICC file so I can draw some gamut coverage comparisons using ArgyllCMS tools?
Thanks to AusMacFan contribution, I was able to compare the new P3 iMac display to my reference Dell AdobeRGB wide gamut display. This is strictly a color gamut comparison, ignoring any other variables, like screen reflections, shadow grayscale and gradient responses, etc.
The Dell wide gamut display has stronger blues and cyans, true to its claim of 99% AdobeRGB coverage. The late 2015 27” P3 Retina iMac Display surpasses it only slightly on the magentas and reds, but is considerably larger on the green-yellow-orange parts of the spectrum.
Overall shape is very similar to the DCI P3 color space, falling a little short on the greens and blues, but actually surpassing it a bit on the purple-magenta axis.
Which color gamut one is more useful?
For video, definitely the iMac, since it corresponds closely to a video standard.
For web, both represent a real problem until all browser vendors adhere to the color management guidelines suggested by the W3C. In a nutshell, only Firefox (if properly configured) and Safari do color management right on the Mac platform. Chrome interprets ICC v2 profiles embedded in images, but fails to apply any color management to the other page elements, rendering them on the full display gamut. P3 iMac users will see oversaturated colors on Chrome, as any other wide gamut display users.
Compared to a high end inkjet on fine art baryta paper (Epson 9900 and Epson Exhibition Fiber), the P3 iMac display falls short on the blues. The Dell AdobeRGB wide gamut monitor covers almost all of the printer colors on the blue axis, but, on the other hand, fails to achieve its full gamut on the yellows and oranges.
For photographers, it’s a wash between AdobeRGB wide gamut LCDs and the new Apple P3 displays. Both represent a tangible improvement compared to traditional sRGB displays, specially for those doing fine art printing.
Keep in mind that those gamut limitations don’t necessarily represent a problem in real world usage. Color managed apps map out of gamut colors to the display gamut, keeping the overall image representation plausible and accurate.
Looking for a previous generation 27" 5K iMac ICC profile for comparison.
Thats fantastic, thanks for doing all that work halfcamerageek! Adding to what you have said about browsers, I have noticed on my rMBP that whenever I use a calibrated profile, Safari does some really odd colour shifting with fullscreen video, and so does Quicktime. I'm not quite sure what causes it, but I have noticed that Chrome does not do the same thing, perhaps because it defaults to the stock profile? When I did a full reinstall of the OS of my rMBP, the issue was no longer there at first, but quickly started happening again. I haven't noticed this on my iMac yet, but perhaps it an OSX issue?
Thanks for doing this! It's good to know that the new display actually offers tangible benefits.
Last edited:
Thanks! Unfortunately your profile and AusMacFan's are both ICC v4 and Argyll CMS couldn't process them for the gamut coverage calculation. I tried some alternative methods, but none worked well.
By the way, I usually configure i1 Profiler to output v2 profiles, which are more compatible and have no real world drawbacks compared to v4 profiles. I've had some wonky results with v4 profiles and Firefox, in the past.
Most video players are not color managed. Safari and Quicktime must be applying some some of color management on their output by taking your display profile into consideration. Chrome ignores it completely. That should explain the difference.
You can test your browser's color management capabilities here, or read this article about color management on the web. It's a little outdated, though. Safari is now fully color managed.
I don't see why people think they will redesign the iMac. If they wanted to redesign it they would've done it when they moved to Retina.
The 5mm edge is still gorgeous and there's no room to spare to make it thinner, the 5k already runs hotter than the older ones.
Last edited:
Ok, I've done the same calibration but with ICC v2, here's the .icc:
https://drive.google.com/file/d/0B2-_zCiiUdl8dHFvZ1J3c0dqQk0/view?usp=sharing
Super cool. Thanks for doing that. This will allow me to get better insights, like finding out which gamut is more useful in the real world. I'm still trying to understand Apple's decision to aim for a different gamut than the traditional AdobeRGB wide gamut displays.
It'd be also interesting if you could share the Apple provided default profile for your LCD. It's usually located in /Library/Colorsync/Profiles/Displays and has the name of your computer or just "Color LCD" along with a random string of characters.
I'll post my findings soon.
Last edited: