While the chinese true 120hz does not arrive i pulled the trigger on a 39" seiki. amazon and dhl delivered in in brazil in less than 10 days!
i knew it would a pita to setup, but it is much worse than i expected.
i have a 7950 with HDMI and passive displayport adapter, both with the hdmi cable that comes with the tv:
using the DP adapter i can run 1080p 30hz and 1080 60hz, without artifacts.
using the hdmi port on the vga i can ocasionally get 2160p 30hz and 2160p 24hz, but the image is red with flickering and grainy as hell. the worst thing is i still havent figured it out how to reliably turn off tv and pc and make the desktop start at 2160p, with or without red grainy flickering image.
i ordered an active mini displayport 1.2 to hdmi 1.4a adapter but meanwhile i need help:
already patched AMD drivers and removed the pixel click limit
toasty CRU did not help a lot, plus windows force detects the tv time and again
custom .inf helped a bit but did not solved the issue.
a step by step idiot proof guide for 2160p at any refresh rate without the red grainy flickering would be great.
Hi, i just got this tv in the mail today, i'm using houkouonchi's .inf file for it.
My only question is if it's at all possible to get it to do integer 1x1 -> 2x2 scaling in 1080p120hz, or failing that atleast get it to use the full screen area. (got some black bars on the top and bottom.. :/ )
now, other than this scaling troubles, 120hz works beautifully as far as input lag goes, super hexagon was perfectly playable on hyper hexagonest, it felt very very responsive.
edit: i seem to have improved it significantly by opening up cru and setting resolution to 1920x1081, no idea why that helped, but i ain't complaining, trackmania looks amazing now.
It just worked on my macbook pro retina when running windows on the 50 inch and I was able to get it working on the 39 inch as well in linux.
I could not get the passive adapters working well at all. I think you will have much better luck when you get your active adapter.
Well I am getting used to the 39" in place of the 50"...
Anyone using the 39 care to share your calibration values to get me in the ballpark?
Overall I'm pretty happy with the colors but it does need a bit of tweaking...
Us computer people would have preferred the pixel doubling approach but I totally understand why that doesn't make sense for a TV so I think its a pipe-dream of them ever doing it.
I used these bunch of tests for Seiki 39" calibration.
Color Mode: Normal
Gain Red 105
Gain Green 105
Gain Blue 135
Offset Red 495 >>> to be tweaked
Offset Green 505 >>> to be tweaked
Offset Blue 504 >>> to be tweaked
Inside AMD CCC:
I have perfect white level tests, half-bad black levels test, decent gamma at 48% luminance. Unfortunately gamma is around 2.5 at 25% and 10% luminance bars, which is to be expected in VA panels, along with the crushed blacks. The service menu + CCC made me happy een without a colorimeter. Maybe reversing steps and resetting the CCC adjustments and doing the color offsets tweaks in service menu first is more rational way of doing it.
Or failing that. replacing the board with a gsynced one.
10.9 on my iMac & MBPr was plug and play. Used the Accel active mdp adapter, and 30hz came right up. only issue i had was vsync lag on 10.8.
what are you using for an HDMI adapter?
This is a hackintosh. I have 2xhd6850 cards but they don't support the 4k resolution via HDMI, so I was using the 4770k hd4600 onboard graphics via an HDMI port built into the Asus Z87 Pro motherboard.
It works fine in windows with the hd4600 graphics, although I think it might be a bit more jerky than a more capable card would be.
I saw the Accell adapter mentioned, and am curious if that would work for my 6850's. Otherwise this might require me to get a new card, and AMD cards are inflated in price big time right now. So not sure if I want to keep this thing at this point or not.
Yes, using the Accel adapter.
There is no reason for a TV that can do 4k/30Hz@297MHz pixel clock to not reach a notch above 31Hz even with heavily reduced blanking timings.
Even if for some strange behavior the TV can not do 120Hz@1080p, it should at least do 72/96/100Hz. Next month i will have my camera back and will repeat refreshratemultitool tests and locate exactly at which point the TV starts dropping frames, i suspect the soft limit is 60Hz at all resolutions.
I wonder if someone could provide some quick summary answers to the following questions. I'm still not 100% clear on them, despite having read through this thread, and I think they are questions that a lot of non-technical readers / potential buyers are wondering.
1) What are the substantive differences between the 50" and 55" models in terms of quality and underlying hardware?
2) From any testing done here, does it appear possible for any of the 39", 50" or 55" models to hit 60hz @ 4K through firmware tweaks? If not, does it appear possible to hit 60hz through the combination of firmware + an external hardware adapter? Or would it require swapping out internal circuit boards?
Thanks in advance!
1) 50 is a ChiMei Innolex panel vs AUO and appears to be superior quality from most reviews. The 55 inch can do 120Hz motion interpolation at 4k (for smoother motion). The 50 inch; however can do 120Hz @ 1080p which the 55 can't.
The 55 inch is thicker/heavier and IMHO looked worse so I personally would go with the 50 inch.
2). None of these are probably going to ever do 60Hz @ 4k. The panel themselves are capable of higher than 30Hz though but the firmware and/or controller is holding them back. The hardware of their TMDS -> LVDS controller does appear to be able to handle more bandwidth but its unclear if its some sort of other hardware issue keeping the refresh rate back or just firmware. Since they surely will not do 60Hz I would not expect seiki to ever release a newer firmware that did something that was > 30 but <60.
Very helpful reply.
I had purchased the 55" online without having seen the thickness in person, and was surprised by how thick it was. Not having seen the 50", how much thinner is it?
Bummed to hear that neither of these are going to make it to 60hz @ 4k. Sounds like it might be worth waiting for the next generation models.
I've watched a couple 4K videos on the 55 and was pleasantly surprised by its performance with MEMC enabled. But 1080p not working at 120hz is a deal killer. I wasn't aware of this limitation. Is that something that can be addressed via firmware?
The 120Hz @ 1080p would be a limitation of the TCON and thus I would say unlikely that one will ever do it especially since it properly does the 120Hz effect @ 4k so its already technically doing 120hz.
According to the specs on seiki's website the 50 inch is 2.09 inches thick and the 55 is 3.81 so I would say that is a pretty significant difference. It definitely seemed significant to me especially because the 55 seemed pretty thick even around the edges where as the 50 inch is around 1 inch thick until you get farther into it where it has the inputs and stuff.
I didn't use the 55 inch all that long myself (just tested it in the store) but I assume input lag is probably much worse on the 55 inch as well as at 1920x1080@120Hz on the 50 inch its almost non-existent which actually makes it excellent for gaming on. I would assume even at 4k its better since the MEMC probably adds quite a bit of latency.