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I got a refurb monitor once from Dell. It had a few dead pixels. I sent it back and they sent me another refurb as a replacement. This went on 3 or 4 times before I concluded that refurbs have a higher probability of being less than perfect. With the Seiki 39" I have, I'm not experiencing...

The good news is that they are going to be showing new 4K monitors at CES. The bad news is that their old monitor is class-action lawsuit material.

I'm beginning to wonder if there might be a newer model coming out and they are blowing out the old ones? What I'd love to see is a smaller (maybe 24-27") touchscreen 4k monitor to use with Windows 8. The Panasonic 32in 4k Touchscreen doesn't appear available in the US although it can be...

$405 now at amazon for the 39"

I got blanking occasionally when using my laptop, but not with my desktop. Same Seiki 39", same HDMI cable. It's been a while since I tried it, but originally I concluded it must be something different about the HDMI connector not making a good connection or the video hardware on the laptop...

Thanks for the info on PS4. Shows how little I know about consoles. In terms of graphics drivers, I've tried video cards from both Nvidia (GTX760) and AMD (HD7950). I've tried various version of drivers. I get the same results, slight lag at 4k, but no lag at 1080p. I've not tried the...

You can try other monitors, but after doing some of my own experimenting and researching on the web, my conclusion is that this is not a problem of 30Hz or the monitor, but rather something screwy with windows. For example, if you set the Seiki at 1080p @ 30Hz, you won't see the same lag you...

I don't think VSYNC is the issue. 30Hz @ 1080p with VYSNC on, feels a lot more responsive than 4k. There's something else involved here.

Does anyone have experience running the Seiki off a Mac vs Windows? Does OSX have significantly less lag than Windows?

For clarity, my system is not doing any 1440p scaling because it's not an available resolution option. The lagom website is useful. thank-you.

Thanks for the confirmation Mark. I tried the possible resolutions for my system, but none of them appear to be dropping information like the 1440p examples.

houkouonchi, Sorry, I didn't read the earlier threads carefully enough. I understand what you are saying, but it's difficult for me to see what the difference is without a back-to-back. (i.e. I don't know what the original 1:1 looks like, so it's hard for me to tell how far off the "bad"...

If you are trying to simulate the scaling of the monitor, you are producing results that are far inferior to what the monitor is producing. The way you are doing it, you are throwing away information, but in reality, the scaler doesn't throw away information. You just need to take your...

Maarten, what do you mean by that? you checked out the tcon and there were 2x 81 pins?

The new firmware with the brightness control is a huge improvement. There appears to be a minor bug with the brightness settings. If I set brightness to 1, then power off the monitor (disconnect power because my Seiki is connected to a UPS that switches off the monitor's AC outlet when my...

I applied the new firmware for the 39" which reset all the settings. Backlight settings are now saved. Yeah! That was annoyance for me, so all much better now. BTW, does anyone know if there is a way to turn off PnP for the displays? Currently, when the Seiki turns off, Windows7 will...

I went and did a clean dual-boot installed of Windows 8 (using AirBoot). I'm testing it now. It does seem less sluggish though.

Maarten, Would you describe a bit more what differences you notice in terms of responsiveness and lag? Is it very noticeable?

One of the issues with 4k monitors is the lag. Originally, I thought it might have been due to the Seiki, or my video card, but after trying multiple video cards, and doing some research online, I've concluded the problem is a Windows issue. Google "(UHD OR QHD OR 4K) (lag OR sluggish OR delay...

Thank-you, that is useful information. I will say that 2 Titans are $2000. 2 Radeon 7970s are $600. There's a big difference in price so I'd expect a $1400 difference worth of performance. ;) I went from a single 6870 to a GTX 760 and now to a Radeon 7950. For gaming, between the GTX760...

How would a higher refresh rate be advantageous for movies? aren't all shows 24-30Hz?

Are you using one of these Seiki's or another 4k monitor?

@alamone When I look at performance/$ I see that Radeon has the edge. A typical 7950 is lower cost than a GTX760 and has similar performance in gaming. The OpenCL and computational capabilities are much better with AMD. Overall, I'm more interested in application speed rather than gaming. So...

@houkouonchi Changing the cables makes no difference. Other than the mouse tracking issue which Maarten has also experience, the video card issues are pretty consistent on my computer so they don't feel like a cable problem. I've had hardware problems with Nvidia cards over the years, so...

Thanks for your suggestion. I will try a different cable tonight, but the only thing I changed in my setup previously was the video card & software drivers. I'm using HDMI1 in both cases.

I have the 39" as well. I assume you are running at 4k res on the card's HDMI connector. If not, please let me know what res you are running at. Would you describe your power up sequence? Do you turn on the monitor first? or do you turn them both on at the same time? What happens when...

FYI, if you are thinking of getting a video card for running 4K for general desktop use, I recommend Radeon over Nvidia. I've been using a GTX 760 for the last few days and just as a summary comparison, for general use (gaming performance aside), the Radeon is less quirky than the Nvidia at...

I would expect the lag to be the same regardless of resolution. After all, regardless of whether it's 30Hz at 4k or 30Hz at 1080, it's still 30Hz. The 4k resolution will have much higher bandwidth to achieve 30Hz, but the "delay" should be the same. However, that's not the way it feels. So...

I installed a GTX 760 last night. The lag at 4k resolution with VSYNC on was no different than with my Radeon 6870. General desktop use is about the same, slightly laggy. Perhaps this is due to the overhead in windows ?

Thanks for your response. I do find it curious. This AOC "survey" suggested participants (which I'd guess are likely gamers) can pick out 120Hz from 60Hz around 86-88% of the time, but there were no difference in FRAG results. (Note that random choice would have resulted in a baseline of 50%...

If you can tell the difference between 60Hz and 120Hz, why not just turn off the VSYNC? It'll become far, far more responsive!

mike, 3840x2160 x 30 bits/pixel = 248 megabits, 1/100th of 30 gigabits. The screen would only need to hold one frame. I suppose it's possible that in a worst case situation, it might store 2 frames (one incoming and one outgoing), but that would seem less efficient to me. Regardless, it...

I can find no information on the RTD2975, but there are some new releases on the RTD2995. No datasheets for either. These are SoC solutions so it's possible that a new SoC solution may released that is a drop-in replacement but with DP input or higher refresh rate on HDMI. This would simplify...

That is incredibly useful. Now if I can only find the datasheet. Realtek does not seem to have it on their website.

Sinuhet, If you still have it apart, would you be able to take a few macro images of the board and the chips that are on there. I know the main chip is covered with a heat sink but there are a few smaller ones around the heat sink. Also the labels did not turn out very clear. If you get more...

Are you thinking of something that fits inside the monitor? Or will it have a new plastic casing? Or were you thinking it would look like a proof-of-concept solution with the additional board hanging out the back? Would this be even/odd or top/bottom half? The top/bottom would be a lot...

For the 4k@120Hz project, I'm doing some information gathering on what sort of electronics are required to accomplish this. 1. if you work in the industry and design LCD controller boards, and are willing to help answer some basic questions, would you please drop me a PM (private message)...

The difference is definitely perceivable, and no doubt 60Hz is better. How much it adds to gaming is debatable. For me, 60Hz -> 120Hz is not perceivable.

Mark, If we can find someone that works in this area that has all the background knowledge, the R&D would be greatly reduced. Maarten's idea on finding the supplier of the electronics and contracting them to make some design changes, would likely be the fastest, and most guaranteed method...

Mark, I'm not sure what the market is for these boards, but let's assume it's 10,000. If they are $200 to make and can sell for $400. Assuming $100 for markup, distribution, sales, etc.that's $1M of revenue. R&D will likely be a few hundred $k, so it should be a reasonable return. There's...