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...seen this once on my TV. I turn the TV off and back on haven't seen it since.. this was two months ago.Wanted to thank everyone here, and on other boards regarding using 4K UHD's as desktop monitors. The info here swayed me to get the Quasar 42" as well as a new vid card. The big bonus was that I was able to eBay my 5 year old 30" Dell (U3011) as well as the 5450 video card for a value equal to the purchase of a new 42" Quasar (sale at Overstock.com) AND a new GTX970 card (Newegg). No extra $$ out of pocket. Sweet. The card came in Saturday, and the Quasar came in yesterday. I got it all set up and connected very quickly, then carefully studied the tweaking recipes found in this thread. Was able to get the 3840x2160/60hz, the 4:4:4 test image to render, as well as the test text image where I was able to read the bottom two lines (don't really know if this is a objective test of true 4:4:4). Played a full screen 4K YouTube video, absolutely stunning. The downside is the screen font/text quality. Slightly jagged no matter what I did (including scaling text up)...but workable considering. I am NOT a gamer. My objective was massive desktop pixel real estate, which it more than reasonably provided (I would have no problems going even larger now)
Everything was coming along swimmingly! I kept thinking how the person that bought my eBay'ed stuff obviously wasn't aware of the 4K options. Downloaded Firefox to see if it rendered better than Chrome, walked away during the install, came back about 20 minutes later...and... UUUuuugh!!! Half the screen was all static (exactly half). reconnected, rebooted, changed HDMI ports... went to the menu on the remote, and even the menu was half gone behind the static. Monitor hard power cycle produced the same thing with the Quasar splash screen. So I new it BRICKED. Already placed the RMA with Overstock for a replacement, will try once more (although this is a minimum 2-week turnaround) Soooo close. (tried to link images directly here, but just broken icons)
tboo, How's the input lag with your quasar? My desktop, I usually do web browsing and photoshop. I generally every now and then play call of duty.
What are you playing that needed two 980's? I've been very happy with my single 970, but I've been playing Fallout 3 and New Vegas again.
Hi everyone, I just created an account here to chime in. I recently just purchased a Seiki 42" 4k TV with HDMI 2.0. It was a terrible disappointment, and is unusable with the amount of input lag. It feels like it's a quarter of a second before I see any movement on the screen when I move the mouse. Is this a "one off" experience I'm having, or are most 4k TVs used as monitors susceptible to large amounts of input lag?
EDIT: I have 1 GTX970, and a i5 2400K CPU. Windows 7 64-bit.
EDIT2: I live near a Fry's also, and they have the SILO in stock. If this is even usable in Windows and works for some games (I do mostly Flight simulations) I would prefer it over the Seiki I have now.
EDIT3: Sorry! I just realized there is an instant rebate this week from July 12 through the 18th. $150 off. I can pick this up in store for $299. Again, I'm just slightly worried about the input lag because of the $300 Seiki that I still have.
4k @ 60Hz with the default 4:2:0 horizontal;4:2:2 vertical color, best run was about 115ms lag (worst was about 130ms)
4k @ 30Hz with the default 4:2:2 horizontal;4:4:4 vertical color, best run was about 175ms lag (worst was about 185ms)[/B]
Since I don't have a GTX 9 series yet, my desktop is 4k 30hz. It is not 4:2:0 at 30hz. Text looks normal. I think it's either 4:2:2 or 4:4:4 because I can read all the text on that 4:4:4 chroma test.
My first Silo had a couple of black dust speck behind the screen. My second one has just one, but it's like at the edge of the tv and I can live with that.
All my games that I tried looks amazing. I play mostly MMO and Diablo 3 and I don't notice any lag really.
Overall, I love this TV, especially for the price.
If you are signed up for Fry's promo codes, the UN40JU6700 is going for $500 tomorrow, Saturday. Same TV as in the ad three weeks ago that user basically11 bought for $600 (I can verify -- I also called that Saturday morning and Fry's stated it was the 40JU6700). Looks like Fry's is having a hard time unloading those 40" curved screens. Too bad 40" is just a tad too small for my gradually worsening vision.
I've been working on a monitor lag measuring setup that others would be able to utilize without having specialized equipment. With a custom written program that uses an OpenGL window and a low-latency audio interface with a plain old green LED in reverse connection as a photodetector, you can get a generally accurate reading of the entire chain of game->video card->monitor lag.
Before anyone asks: no, it's barely in an alpha state and not anywhere near ready for public consumption. However I did some preliminary measurements on my Silo using this setup. The bad news, measured from the middle of the screen:
4k @ 60Hz with the default 4:2:0 horizontal;4:2:2 vertical color, best run was about 115ms lag (worst was about 130ms)
4k @ 30Hz with the default 4:2:2 horizontal;4:4:4 vertical color, best run was about 175ms lag (worst was about 185ms)
I haven't checked against an oscilloscope yet, and there's probably a small amount of introduced lag because I haven't optimized the recording chain (as you can see from the margin between best and worst measurements), but this should give you a pretty good estimate of the lag you'll encounter in actual use.
In my tests, there was no difference between "Graphic" and "Video" modes @ 4k. The only thing this seemed to have any effect on was when the signal was 1080p. Only then did it do any processing.
TongFang manufactures these TVs. Seiki is their house brand. They also are an OEM for Silo, Polaroid, Sansui, Magnavox, Element, Westinghouse, and probably many others. Their chips are based on Allwinner ARM/Mali cores which are a quite a bit weaker than the cpus you find in top tier TV manufacturers, so I doubt you would be able to find any difference in latency amongst the various brands.
RTings has a handy-dandy chart that shows you available 4k TVs that can work as monitors.
What are your thoughts on this 39" Korean 4:4:4 4k monitor
https://www.youtube.com/watch?v=o553bTyFElQ