Dell U2711 27" IPS 2560x1440 Monitor - $649 w/ Free Shipping, Dell 3 year warranty

Quote from ikisat : Most likely the backlight or brightness setting was turned way up. Often you can't even change the backlight level so if it's too bright you have no fix for it. The fact it was LED has nothing to do with it, LED in general causes much less eyestrain than CCFL .

This is 100% wrong. I know it is common thinking but it is wrong.

Yes, old flourescent lights flickered and caused headaches. That is true. And pure LED light does not flicker. That is also true. Both of those facts are completely irrelevant to this point.

Most monitors have been using a technique known as pulse-width-modulation (PWM) to dim their backlight for about the past 7 years or so. This means that instead of just turning down the power to the backlight, they rapidly flash the backlight on and off at a frequency higher than the human eye can detect, thus giving the illusion of a less-bright light. The problem is that people who are migraine sensitive tend to get horrible headaches from this technique.

In monitors that use this PWM technique, LED backlighting is MUCH worse than CCFL because CCFL light has more persistence than LED light, therefore mitigating the strobe effect. LED light is more instant on-off, thus creating a true strobe effect and maximizing the migrane-inducing qualities of the monitor.

There has been an explosion of people having headache issues with LED-backlit monitors in recent years. I am one of them--that is why I have done so much research into this. CCFL monitors that use PWM also bother me, but much MUCH less than LED ones. An LED montor that uses PWM might give me a headache in 5 minutes, while a CCFL one takes hours.

Either way, PWM is a horrid technology that should go the way of the dodo, and companies should return to using power-control for backlight dimming. It looks like most of the new 27" Dell monitors this year are doing this, so hopefully that is the beginning of a trend.

Quote from digital2d : I ask because all signs point that the Dell U2711 uses the LM270WQ2 panel which is 8-bit+A-FRC, not the 10 bit. maybe something has changed in production of these.

Here's the wiki info [google.com]

Quote from JamieH : This is 100% wrong. I know it is common thinking but it is wrong. Yes, old flourescent lights flickered and caused headaches. That is true. And pure LED light does not flicker. That is also true. Both of those facts are completely irrelevant to this point. Most monitors have been using a technique known as pulse-width-modulation (PWM) to dim their backlight for about the past 7 years or so. This means that instead of just turning down the power to the backlight, they rapidly flash the backlight on and off at a frequency higher than the human eye can detect, thus giving the illusion of a less-bright light. The problem is that people who are migraine sensitive tend to get horrible headaches from this technique. In monitors that use this PWM technique, LED backlighting is MUCH worse than CCFL because CCFL light has more persistence than LED light, therefore mitigating the strobe effect. LED light is more instant on-off, thus creating a true strobe effect and maximizing the migrane-inducing qualities of the monitor. There has been an explosion of people having headache issues with LED-backlit monitors in recent years. I am one of them--that is why I have done so much research into this. CCFL monitors that use PWM also bother me, but much MUCH less than LED ones. An LED montor that uses PWM might give me a headache in 5 minutes, while a CCFL one takes hours. Either way, PWM is a horrid technology that should go the way of the dodo, and companies should return to using power-control for backlight dimming. It looks like most of the new 27" Dell monitors this year are doing this, so hopefully that is the beginning of a trend.

Interesting, my knowledge was based on lighting in general. This PWM issue seems to be the opposite problem where it's better to have your LED monitor on max brightness to stop it from flickering. There seems to be several manufacturers now who are producing PWM free monitors as of 2011+ models so it does seem to be trending towards getting rid of the technology. It's apparently the same issue that older CRT monitors had it's just a new way of causing it.

Quote from AGpennypacker : Quote from ikisat : Since you opted to quote a small portion of what you said I've opted to re-quote the entire thing since you apparently forgot that resolution isn't all you mentioned. See the entire post after that first sentence? Where you go on to explain all kinds of different reasons why the Dell is better when it's not because it's using a 13 year old screen standard that has been improved upon a half dozen times in the past decade. It's good compared to a TN panel but compared to more modern IPS panels it's pretty dated and color reproduction isn't as good. You also seem to imply that dell isn't a cheap korean model when in fact they easily could be since dell doesn't make it's own stuff. To my knowledge dell doesn't actually make anything... They may make something I'm unaware of but it's definitely not monitors or laptops/computers since they buy those from suppliers just like almost everyone else does. We agree that resolution is a driving factor in cost but you seem to keep implying there are other major factors in the price of this monitor which there simply isn't... other than the resolution the only factor worth mentioning is Dells logo which they often charge quite a lot for considering they didn't make what it's stamped on. Some bullet points... Asus 27" AH-IPS technology from 2011 AH-IPS is the best color reproduction and highest quality IPS panel type to date. 1920x1080 for $350 Dell 27" S-IPS technology from 1998 S-IPS is 5-6 generations old as far as IPS technology goes, it's still a huge step up from TN. 2560x1440 for $650 See why I say your other points don't make any sense to me? Is it all out of your system... Would a monitor at that resolution without an ips and bad color reproduction be the same price? No it wouldn't. It's features have a cumulative effect on the price and if you don't agree then there is nothing else to discuss. Someone asked for a simple reason why this was different then other monitors, I gave a simple response.

Agree. I didn't just buy this monitor for resolution. I bought it for the excellent 3 year instant exchange warranty, the wide gamut for my photo editing needs. The awesome stands and versa mount capability. It's just a great all in one package.

Don't even compare that with asus crappy quality assurance on their monitors.

Sent from Slickdeals App for iPhone & iPod Touch.

Quote from ikisat : Interesting, my knowledge was based on lighting in general. This PWM issue seems to be the opposite problem where it's better to have your LED monitor on max brightness to stop it from flickering. There seems to be several manufacturers now who are producing PWM free monitors as of 2011+ models so it does seem to be trending towards getting rid of the technology. It's apparently the same issue that older CRT monitors had it's just a new way of causing it.

Yes, it is not the lighting itself that is the problem, but the technique used to dim it that is the problem. Unlike the evil old-school flourescent light (which is definitely bad news), most of the CCFL backlights used for monitors these days are probably refreshing themselves so quickly that they cycle much more rapidly than even the most sensitive human brain would ever detect. However, using an optical oscilloscope I've measured the PWM frequency of several monitors to be down in the 120-200Hz range, which is definitely within the range that can bother people with migraine issues.

Luckily, monitor review sites like tftcentral are now publishing which monitors use PWM so that people can make informed decisions without having to use electrical engineering equipment!

And you are right--nearly every monitor does not exhibit the problem on max brightness. But then you have the issue of staring at a monitor that is melting your eyeballs!

Quote from t8i5n : Agree. I didn't just buy this monitor for resolution. I bought it for the excellent 3 year instant exchange warranty, the wide gamut for my photo editing needs. The awesome stands and versa mount capability. It's just a great all in one package. Don't even compare that with asus crappy quality assurance on their monitors. Sent from Slickdeals App for iPhone & iPod Touch.

Yes the Dell warranty on these monitors is kick-ass, I got a replacement in less then 48 hours.

Quote from t8i5n : Agree. I didn't just buy this monitor for resolution. I bought it for the excellent 3 year instant exchange warranty, the wide gamut for my photo editing needs. The awesome stands and versa mount capability. It's just a great all in one package. Don't even compare that with asus crappy quality assurance on their monitors. Sent from Slickdeals App for iPhone & iPod Touch.

If you're willing to pay an extra $300 for a stand you can buy for $20 on monoprice I have no argument simply the question, why are you a slickdealer?

Asus generally ranks higher than dell in quality and Asus actually make quite a lot of their own stuff unlike dell who buys from suppliers... so not really sure what your comment is even supposed to be implying.

As for Dells warranty that sounds great but I get the same thing simply from buying anything on Amazon or Costco or really any reputable retailer so why would I pay $300 for a warranty that provides the same thing any reputable retailer provides?

Just so you guys know:

U2711 - 1.07 billion colors - CCFL backlight - uses over 100W
U2713HM - 16.7 Million colors - W-LED backlight - 42 - 100W
U2713H - 1.07 billion colors - GB-LED backlight - 60W


Last one uses the latest LG panel with the newest backlighting tech.

Quote from ikisat : If you're willing to pay an extra $300 for a stand you can buy for $20 on monoprice I have no argument simply the question, why are you a slickdealer? Asus generally ranks higher than dell in quality and Asus actually make quite a lot of their own stuff unlike dell who buys from suppliers... so not really sure what your comment is even supposed to be implying. As for Dells warranty that sounds great but I get the same thing simply from buying anything on Amazon or Costco or really any reputable retailer so why would I pay $300 for a warranty that provides the same thing any reputable retailer provides?

Just got back from a wonderful dinner, and life is good. Not surprising that you would compare the stand on this monitor to a $20 monoprice one. You're out of your element, Donny. If you purchased a Korean 27", there is nothing wrong with that. The bang per buck on those are fantastic...the end. Good night.

Quote from AGpennypacker : Just got back from a wonderful dinner, and life is good. Not surprising that you would compare the stand on this monitor to a $20 monoprice one. You're out of your element, Donny. If you purchased a Korean 27", there is nothing wrong with that. The bang per buck on those are fantastic...the end. Good night.

Well I bought the Asus one they aren't Korean but they buy from the same screen manufacturers as Dell since neither Asus nor Dell actually make screens. Again I'm really unclear on why you keep mentioning "Korean" like it's a bad thing since a huge portion of everyones products are from Korean manufacturers... In the screen market more of the companies are Korean than anything else and most of Dells suppliers are Korean so in buying a Dell you're buying a Korean monitor. I have absolutely no idea why you wouldn't compare Dells monitor stand to a Monoprice one they're the same thing.

Got this monitor and I love itm, but my electricity bill went up by $10 each month when I start using it.

Quote from 2elve : Got this monitor and I love itm, but my electricity bill went up by $10 each month when I start using it.

But did you really lose money since you were more productive and saved time?

People are so stupid IMO. Microcenter sells the Auria 27" IPS monitor for $399.99 which uses the EXACT same LG LM270WQ2 panel as this Dell U2711.

$399 for the Auria vs $650 for this Dell and now you see why people are so stupid....

Also 8x CCFL is SUPERIOR to the PWM dimmed LEDs. PWM dimming found on almost all LED monitors will ruin your eyes and nervous system and it's NO joke. People simply dont have a proper education as to its effects.

Education is KEY to our reality, and this "deal" SUCKS. Its just another attempt at Slickdeals to make more referral money on the stupid.

TThats way cheap.
Is it used or something?

Quote from Luxferro : http://www.shopblt.com/cgi-bin/sh...d=!ORDERID! after you factor in tax/shipping from dell, it's pretty close in price. I've been thinking of ordering one, but be warned, there are issue with the current USB 3.0 hubs in them. Check the dell forums. So I'd hold off on the new models until they fix the problem. http://en.community.dell.com/supp...x#20301494 And if you want a good detailed review of the new one: http://www.tftcentral.co.uk/revie...u2713h.htm I think I will be holding off buying any the new series of monitors, just incase fixes like mentioned in the below linked review can happen for the Dells. They use the same panels in their new monitors as well. So it's just a matter of them putting in the same time and determination as LG did here. http://www.anandtech.com/show/674...ew-rev-125 So I think I'm waiting for dell to do their fixes, or buying LG versions of this monitor LG 27EA83, assuming it gets the same fixes as the LG 29WA93. For me the input lag is important, as I'd like a monitor that is all around good and can be used for the occasional game as well. The game mode on the current U2713H does nothing.