Q: Why Korean PLS monitors? What is different about them?
A: Here is some back story: IPS Korean monitors have been around for awhile now, but with increasing popularity their prices have risen. Overclocking variants cost even more.
Out of this comes new Korean variants using the Samsung PLS screen, specifically the Qnix and the X-star, which offer the same (if not better) image quality of the popular IPS and have a very good chance of overclocking to 120 Hz.
Q: Is it worth it to buy a pixel perfect monitor?
A: No. All evidence as of now suggests that probability of receiving a monitor with no or little dead pixels is random, even if purchasing a 'pixel perfect' monitor. It seems that it is a marketing ploy for them to get more money.
Q: Does the single-input version of these monitors overclock?
A: Yes. To see the various overclocks (OCs) reported, look to the expandable section below titled "Members List Form Submission Trends, Analysis" and look for the pie graph of reported OCs.
Q: Does the multi-input model of these monitors overclock?
A: No. Even connecting the multi-input monitor via dual-link DVI will not result in it being able to overclock.
Q: Is the multi-input model of these monitors good for gaming?
A: No. They have "two frames of input lag" and thus are very bad for gaming.
Q: Does the TRUE10 model (10-bit panel) overclock? How is the input-lag?
A: No it does not overclock (regardless of what they try and tell you, for the time being). Input lag is worse than on the 8-bit panel version. DO NOT get this if you are trying to game. These are graphic design specific panels, and you probably need a 10-bit specific graphics card to even make use of the 10-bit color depth.
Q: If you can overclock in the computer to 120 Hz, does the monitor truly run at 120 Hz?
A: Yes. Proof: http://www.overclock.net/t/1374065/korean-qnix-qx2710-evolution-ll-27-2560x1440-matte-samsung-pls-panel/530#post_19788281
Q: Can I buy a monitor that will OC to 120 Hz, guaranteed?
A: No, not as far as I know. There are theories that monitors sold by certain sellers have a better chance to OC higher, but it is considered to be random.
Q: Does the DVI cable used have an effect on OC ability?
A: Some have reported better and worse OCs from using a different cable than that included. Some have also reported varrying OCs with switching their GPU. YMMV
Q: Do any issues come from overclocking, i.e. does it affect reliability?
A: Unknown at this time. However, other korean monitors have been overclocked for years with no issues.
Q: Should I buy an X-star or a Qnix (Any differences? Which one will overclock better?)
A: Short answer: Choose whichever one you want.
Long answer: They have the same screen, (both samsung PLS), and look almost identical other than their logo. Neither one has been proven to be clearly better, at this time. The general consensus is believed that they have the same random OC-ability.
Q: Should I buy a matte or glossy monitor?
A: Glossy is superior for image clarity (clarity = sharpness of image. not 'quality' or 'color' of image). The Matte coating on these monitors is semi-Glossy, not a thick Matte coating so it isn't as obtrusive as traditional matte coating. So, choosing Matte or Glossy comes down to if you will be bothered by reflections. If there is a potential for daylight or electrical light reflection, do not get Glossy.
Q: Can i remove the stock stand (base and stem) and mount the monitor?
A: Yes. Both the qnix and x-star have 100mm vesa mount pattern, so mounting is possible. Removing the base is easy (unscrew the thumb screw on the bottom), but removing the clear stem requires opening the monitor casing and unscrewing it. There are multiple videos and pictures below in the "Monitor fixes, support, help" area describing how to open the monitor casing. Once the monitor casing is opened, it is easy to see how to unscrew the screws holding in the base stem.
Q: Will I be able to notice the response time and/or input lag (especially in gaming)?
A: Many users, myself included, have noticed motion blur during FPS gaming (such as planetside 2). It would be even more noticeable in 'twitch' gaming. It is fine for regular use (Leauge of Legends, Guildwars 2, etc.), but gaming professionals should look elsewhere.
Q: Is the panel 6 or 8 bit?
A: Panel is 8 bit.
Q: Differences between IPS and PLS? (why is one better than the other, if that?)
A: IPS is made by LG and PLS is made by Samsung. They are both pretty much the same thing, but technically PLS is better.
Q: I don't live in the U.S.. How much will I have to pay in additional shipping fees, VAT, taxes, etc.?
A: Look at the expandable section below titled "VAT, Fees, Taxes by Country"
Q: Does my monitor have any dead pixels or back light bleed?
A: Here is a good website to check. Choose a color and make it full screen to check dead/stuck pixels. For checking back light bleed, choose the black and make it full screen. Make your surroundings as dark as possible with no lights or daylight.
Q: Oh noe, I received a monitor and it has back light bleed (BLB)!! How will I know if it is worthy of getting a return over?
A: Some ebay sellers straight up say that BLB is not something they take returns over. There have been exceptions, however. So take pictures of the monitor in the best standardized way to show BLB. Refer to the "Monitor Fixes, Support, Help" section below for the subsection titled "How to properly take pictures of your backlight bleed" to learn how to take pictures of the BLB, and post them here on this forum.
Q: Is there a way to fix back light bleed (BLB)?
A: Possibly, to some degree. Look below in the expandable section titled "Tape mod to fix Back Light Bleed"
Q: What GPU should I have to support the resolution of this monitor?
A: For non-gaming, anything is fine as long as it has the DVI-D port. For gaming, a card with 2GB GDDR5 is recommended and anything above that is great. Below 2GB will work, just not the best for modern games.
Just because i'm not sure about Quad atm doesn't mean i won't think about it later and i'd rather have the PSU power to do for starters than have to buy another PSU.