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i486dx2-66

macrumors 6502
Original poster
Feb 25, 2013
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So there have been a lot of 5K display discussions recently... trade show teases of new models, lamentations of the lack of options other than the Apple Studio Display, enthusiastic iMac conversions, LG comparisons, etc, etc. But every once in a while, a post comes along, or you find an obscure reference... "but what about the 5K Iiyama?" What Iiyama? Oh... and you learn about a discontinued display, previously unknown to yourself.

Well, after the third or fourth time having that happen to me, I decided to compile a list, and it was actually quite a bit longer than I expected. At least NINE displays, 17+ if you go by model numbers, or into the dozens if you count conversion combinations. I also encountered some common misconceptions along the way (LG is the only 27" 5K panel manufacturer? False. No 5K display bests 60Hz? False. All 5K displays are IPS? False!). So without further ado, here is my list.

This likely isn't complete, Please post here if you know of any others.
Also let me know if you know how to make a table >10 columns wide on the forum... until then, it's just a screenshot of a spreadsheet... But hopefully someone finds this research helpful.

(The yellow highlights aren't things that are good or bad, just things I thought were of particular interest.)

[Converted to a forum table on 2023-05-27]


BrandModelSizeResolutionPPIPanel TypePanel FinishBrightnessColorMax Refresh RateInputsUSB-C PD?Announce or Release Date (earliest)PriceStatusCommentsURL
Apple + DIY5K iMac (conversion)27”5120x2880~218IPSGlossy500 cd/m2 (2017+)P3 wide color (2017+)60HzVaries depending on conversion board.Yes (some options)2014-10?(varies)27” iMac is discontinued, but display panels and conversion PCBs are still available new.Conversion via R1811, R9A18, U49, T18, or T19 display driver boards. 2014, 2015, and 2017+ iMacs have different panels (and resulting characteristic / capabilities).
AppleStudio Display27”5120x2880~218IPSGlossy or Matte600 cd/m28-bit + FRC60HzThunderbolt 3 (USB-C)Yes – 96W2022-03-08$1599, down to $1300 at sales, or $1359 refurbishedAvailableTwo stand options, only one video input (HBR2+DSC Thunderbolt or USB-C, or HBR2+HBR2 Thunderbolt).
Clientop (aka “Clientop Industrial Co., Ltd”) via “Airow Electronics”“5K monitor display”27”5120x2880~218IPSGlossy? (Text says “5K mirror retina screen”…)540 cd/m2Not specified60Hz“HDMI / DP / Type C / USB”Not specifiedUnknown. (First observed on 2023-05-25)$1,528.23AvailableDescription says it uses the LG LM270QQ2-SPA3 panel. Stand supports tilt, rotation, and height adjustment.
DellUltraSharp UP2715K27”5120x2880~218IPSGlossy350 cd/m210-bit60Hz1x mini-DP, 2x DPN/A2014-09$2500, down to $2000 by the end?DiscontinuedRequires dual DP cables for full resolution @ 60Hz.
HopeStar (aka Hope aka Songren, aka “Shenzhen Hopestar Sci-Tech Co., Ltd.”)HOP5K2727”5120x2880~218AH-IPSMatte,Hard coating (3H)310 cd/m216.7M Colors60Hz2x HDMI 2.0, 2x DPN/AUnknown. (First observed on 2023-05-25)$530!AvailableSeller offers OEM branding, packaging, etc, so this same display may appear in the future under other names. By far the cheapest new 27” 5K display ever available.
HPZ27q27”5120x2880~218PLS (IPS)Matte300 cd/m210-bit60Hz2x DP 1.2N/A2015 (CES)$1,300.00DiscontinuedRequires dual DP cables for full resolution @ 60Hz. Uses a PLS panel (made by Samsung).
IiyamaProLite XB2779QQS27”5120x2880~218IPSGlossy440 cd/m26-bit + A-FRC60Hz2x DP 1.4, 3x HDMI 2.0N/A2018-03$1,077.00DiscontinuedNote low color depth! Uses same glass panel as iMacs (empty hole from camera). Does not support DSC or dual-DP. Full resolution is only available via DisplayPort connections. User report: The Iiyama XB2779QQS (and possibly Planar IX2790, but I've only confirmed it on the Iiyama) can do "dual DP" (aka dual-link SST) for 5K60. It has a Picture-by-Picture mode (#706). This will not result in a "combined" desktop on macOS since the EDIDs don't contain tile information and there's no .mtdd overlay for the display.
KuyconG27X27”5120x2880~218H-IPSGlossy520 cd/m2 typical, 590 cd/m2 peak8-bit + FRC60HzHDMI 2.0, DP 1.4, TB3 / USB 4Yes – 100W2022-10?$779.00AvailableAvailable in two enclosure styles (one like Apple Studio Display, one like Apple Pro Display XDR) and multiple stands. Max resolution not available over HDMI.
LGUltraFine 5K 27MD5KA, 27MD5KA-B?, 27MD5KB, 27MD5KB-B27”5120x2880~218IPSGlossy500 cd/m210-bit60Hz2016-10-27DiscontinuedLots of name variants on LG displays… haven’t fully researched the differences, but went with groupings from displayspecifications.com. Early LG units had a soft-recall for EMI/interference issues 27MD5KA are Thunderbolt only. They require dual HBR2 over Thunderbolt for 5K60. 27MD5KL requires Thunderbolt for 5K60 same as 27MD5KA. Max framerate at HBR2 link rate (single DP mode) of LG UltraFine 5K is ≈39Hz even though HBR2 should allow up to ≈46Hz or 47Hz for CVT-RB2.
LGUltraFine 5K 27MD5KL, 27MD5KLB, 27MD5KL-B27”5120x2880~218IPSGlossy500 cd/m210-bit60Hz2019?$1299.99, as low as $905 refurbished (Amazon)Available(See above)
LGUltraFine 5K 27MD5KLB-B27”5120x2880~218IPSGlossy500 cd/m210-bit60Hz$1,049.00Available(See above)
PhilipsPerfectKolor 275P4VYKEB, 275P4VYKEB/0027”5120x2880~218PLS (IPS)Glossy300 cd/m210-bit60Hz2x DPN/A2015-09? (displayed at IFA 2015)$1500?DiscontinuedPLS panel (made by Samsung).https://www.philips.co.uk/c-p/275P4VYKEB_00/brilliance-5k-lcd-monitor-with-perfectkolor, https://www.kitguru.net/peripherals...rilliance-275p4vykeb-5k-monitor-review/all/1/
PlanarIX279027”5120x2880~218IPS440 cd/m28-bit76Hz (60Hz Recommended)3x HDMI 2.0, 2x DP 1.4N/A2018-12?$765?DiscontinuedOnly known 27” 5K display that supports >60Hz refresh rate. Does not support DSC or dual-DP.
RichVisionRV10027"5120x2880~218IGZO500 cd/m28-bit60HzHDMI, DP 1.4, Type-C65WUnknown. (First observed on 2023-08-27)$407.31
(2023-08-28)
AvailableAvailable in silver, green, blue, and grey colors.
SamsungViewFinity S927”5120x2880~218IPSMatte600 cd/m2"Max 1B Colors"60HzMini-DP, Thunderbolt 4Yes – 90W2023-01TBDComing Soon (June 2023)Not yet available.
X-Force27"5120x2880~218IPSGlossy540 cd/m2"1.07 Billion Colors"Unspecified, but supports AMD FreeSync?HDMI, DP, Type-CYes - 60WUnknown (First observed on 2023-08-28)$548.75 (2023-08-28)AvailableAdvertises the use of an LG panel
 

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Nice to see the various options all lined up.

To nitpick, PLS is a Samsung-specific variant of IPS, so it's technically still IPS… just Samsung IPS. It's strange that this panel never surfaced anywhere but that Philips monitor though.

Also surprising to see the low brightness on a few of these. I know that color-accurate setups call for low brightness, but at the same time it seems a little strange for a display costing in excess of $1k to not be capable of hitting at least 400 nits.
 
Kuycon display look interesting. Would like to see some user reports on these, and see how they do long term.
LG displays are not very good value IMO, despite being cheaper than Apple Studio.
Still not many good available alternatives to Studio display.
 
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To nitpick, PLS is a Samsung-specific variant of IPS, so it's technically still IPS…
Nitpicks are welcomed! That's good to know - if any of the other IPS displays have known variants, I'll list those too.

It's strange that this panel never surfaced anywhere but that Philips monitor though.
It is - At the very least, one would think that Samsung themselves would have made a variant?
 
Kuycon display look interesting. Would like to see some user reports on these, and see how they do long term.
Indeed they do. They seem to be at an unbeatable sweet spot for cost, design, brightness, and input flexibility. At literally half the cost of a Studio Display, I really think the only thing holding them back is the lack of reputable resellers.
 
27MD5KA are Thunderbolt only. They require dual HBR2 over Thunderbolt for 5K60.
27MD5KL requires Thunderbolt for 5K60 same as 27MD5KA.
Both of those and the Apple Studio Display are limited to HBR2 link rate, same as any display that requires dual DP for 5K60.
Apple Studio Display can use HBR2+DSC (Thunderbolt or USB-C) to get 5K60.
Planar and Iiyama doesn't support DSC or dual DP so 5K60 is limited to 8bpc.

I wonder what the minimum refresh rate for the displays are at 5K?

Max framerate at HBR2 link rate (single DP mode) of LG UltraFine 5K is ≈39Hz even though HBR2 should allow up to ≈46Hz or 47Hz for CVT-RB2.

Do any of the displays support 5K using 4:2:0 or 4:2:2?
 
As someone who bought a M1 recently and looking for a 5K display, please do not forget that especially the 3rd party panels suffer from purple tint and dreadful compatibility issues. If you want something stable, I would either wait for the S9 or go with Apple panels. (Was thinking about DIY 5K option but even with that, idk if it will be on par with studio display, QA and stability wise :( Honestly **** Apple for removing the sub pixel rendering from macOS and forcing people to spend +1000 for any usable option at all.
 
I suppose a different GPU and/or newer macOS version should be able to get full resolution even with HBR link rate in that case.
Yes, the "HBR2/HBR3 sink connects at RBR" problem only affects [Snow] Leopard on NVIDIA GPUs. And using a Delock 62603 (HBR×4), I was able to get 4088×2880@27Hz.
 
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Please post here if you know of any others.
Addendum:

  • The Dell UP2715K is glossy.
  • The HP Z27q is matte.
  • The HP Z27q uses Samsung’s PLS panel according to Displayspecifications.
  • The Iiyama XB2779QQS is glossy and uses panels manufactured for iMacs (it has the same glass in front of the screen, complete with the empty hole for the iSight.)
  • FWIW, my Iiyama had lots of stuck green subpixels. I mean lots.
 
Indeed they do. They seem to be at an unbeatable sweet spot for cost, design, brightness, and input flexibility. At literally half the cost of a Studio Display, I really think the only thing holding them back is the lack of reputable resellers.
Here is a good review I found. I don’t know Russian, but YouTube allowed for a decent auto translation into English.


By the way, does anyone know what app the guy uses to adjust brightness? He says there is an additional app available, otherwise you have to use the remote.

Thinking I’ll pick up one of these.
 
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I took one for the team and just ordered a Kuycon. $799 including the adjustable stand + $53 shipping. The Russian review above confirmed that it was a high quality LG panel inside, and the HDR mode was pretty good. 1 year warranty, and put it on my AMEX so in case there’s an issue during year 2, I’m sure they’d reimburse me.
 
By the way, does anyone know what app the guy uses to adjust brightness? He says there is an additional app available, otherwise you have to use the remote.
The little menu bar app looks like Better Display:
 
That kuycon G27x is akin to buying those fake AirPods Pros right, cause it literally looks like a knock off Studio Display?
 
That kuycon G27x is akin to buying those fake AirPods Pros right, cause it literally looks like a knock off Studio Display?
Is that a bad thing? Samsung is going the same way with the ViewFinity S9. I personally like having stylistic consistency of my equipment - so third parties making an attempt, instead of just throwing out generic plastic meh is a good thing in my book.

(By the way, the G27X is actually orderable two ways, one of which mimics the case style of the Studio Display, and one the Pro Display XDR:
 
It would be kinda funny to pair the Pro Display XDR version of the G27X with a hackintosh built in that knockoff Mac Pro 2019 case for the most Mac-like not-Mac setup possible.
 
Column for PPI would be useful for understanding native macOS retina support for each monitor.


 
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