Review Index:

Achieva Shimian 27" Monitor Review - 1440p IPS Display at Under $350!

Author: Ken Addison
Subject: Displays

Input Lag Testing

It seems to be a common misconception across various internet forums that IPS displays have too much input lag to effectively game with. We have never believed this at PC Perspective, as we all game on IPS displays on our personal and test machines, and we set out to set the record straight, as well as compare the input lag of these Korean 1440p displays versus other conventional high resolution displays.

So you may be yourself asking "What is display lag?" and "Why is it important?" right now, and those are valid questions. Display lag is a relatively new thing in the computer display world. This input lag, as it is also known, was introduced in newer display technologies including LCD and Plasma.

This is due to the fact that displays such as LCDs have what we call a native resolution, or a certain number of pixels one each panel. In order to run resolutions that aren't of the native size, these monitors have to include things like scalers to appropriately size the input to fit the display. That, along with video processing including things like HDCP copy protection, add latency from the moment that the monitor receives the input to when it is actually displayed. It is important to note that the introduction of scalers and video processors does not necessarily mean that a display will have a lot of lag, but when they are implemented poorly, it can be disastrous.

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In order to test for this lag, our setup included various high resolution displays, a DSLR camera, and believe it or not, a 17" CRT.

The idea behind this testing is that since CRTs have close to no input lag, by mirroring the output of a computer to both displays and displaying a millisecond counter on both, a camera with a high shutter speed (such as a dslr) will be able to capture any given moment in time. When we then analyse this picture, we can see the difference of the timers, which gives us the inherent input lag of the LCD.

Up first is a display which has been touted for years as a very low latency monitor, the Dell UltraSharp 3007WFP. This monitor only has a Dual-Link DVI connection, meaning that there is no scaler chip included, so latency should be low.

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Here we can see an example of our testing, using the UltraSharp 3007WFP. By taking the difference between the readouts of both versions of the timer, we can see that the discrepency between the two is about 31ms, which equals to about 2 frames of movement at 60Hz.

In our testing of the 3007, we found the latency to be consistently around 32ms, which is pretty impressive.

(Editor: We have read that in some cases the graphics card can introduce a delay when mirroring outputs.  While this may be true, rather than directly measure the displays against the CRT, we are using the CRT latency testing to compare the LCDs to one another, against the "known good" Dell 3007WFP.)


Now let's take a look at the Dell UltraSharp 3008. On this model, Dell decided to include every input under the Sun (including things like S-Video and Composite video). All of these connectivity options certainly are nice, however it means that there is an input scaler, and a lot of video processing on this monitor, which may introduce a lot of lag. Let's take a look.

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In this shot, and in all of our testing, we found the latency to be conistently around 45ms. While an extra 15ms may not seen like a lot, it is actually about another frame of lag when you figure in the refresh rate of monitors being 60Hz. It all depends on the person, but one extra frame in your way when you are trying to react in a FPS very well may end up being your demise.


Now let's take a look at the Achieva Shimian. Like the Dell 3007, this only has a single Dual-Link input, and we were expecting similar performance.

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By taking a look at our images from the Shimian, we can see that our hypothesis was validated. Latency of this monitor is about 32ms, 2 frames at 60Hz refresh rate. Seeing as the 3007 is a highly regarded monitor in terms of it's low display latency, this is high praise for such a low cost product.

July 13, 2012 | 11:05 AM - Posted by David (not verified)

I had mine die within three weeks of use. For those who care, I had it locked at 60Hz. The company that sells them through ebay refused to respond to my messages. Ebay had apparently been having this issue with the seller three times previously during the week and decided to refund my money in full.


Great monitor when it works, Terrible Support

July 13, 2012 | 12:06 PM - Posted by Tim (not verified)

Was about to hit "confirm buy" before I read your commend David... I'll wait a bit I guess. Let us know if your monitor dies Ken :S

July 13, 2012 | 12:24 PM - Posted by Ken Addison

I will definitely follow up if it does, but I sure hope not! :)

July 15, 2012 | 11:26 PM - Posted by PowerHungry (not verified)

What dealer on eBay did you pyrchase this monitor??? I see that Amazon offers some of the same monitors at about the same prices, would Amazon be a safer buy??
I'm interested in the Crossover 27Q-P.

July 14, 2012 | 03:01 PM - Posted by Brucethemoose (not verified)

As far as I know, I was the first English speaking person to buy one of these Korean monitors. I got my Shimian back in Febuary, have it running at 70hz, and it's been working just fine.

FYI, this commotion all started on

July 17, 2012 | 01:08 PM - Posted by Anonymous (not verified)

if you buy another one to replace it, you've still spent less than the HP


Owner of a flawless 4 month-old Catleap

July 13, 2012 | 12:09 PM - Posted by Neil gilroy (not verified)

Seem like a bargain to me. I notice that some sellers offer a 'perfect version' with a higher grade panel but then it costs more like 500 dollars.

February 3, 2013 | 09:30 AM - Posted by Anonymous (not verified)

read the fine print of these some of these perfect pixel versions still have a reasonable amount of dead pixels that they consider ok and will not accept a return if you don't have more than so many dead pixels.

December 14, 2013 | 01:14 AM - Posted by Jeramy (not verified)

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July 13, 2012 | 02:04 PM - Posted by dwolvin

have one of these, bought through the group buy (for guaranteed overclocking). There is also a great thread about these at HardOCP (Hardforum). These are great monitors, mine was $50 more but hits 120Hz without issue. The colors are great, backlight bleed is not bad, and unnoticeable in games or any movie not set in the Nostromo… Overall, it’s a great monitor but make sure you read up on who to buy from.

I am not affiliated with anyone from 120hz, they are just a great place to see the different models and who is safe to buy from… ;)

September 12, 2012 | 04:49 PM - Posted by Anonymous (not verified)

Could you please send me whom you purchased this monitor from along with the model and approx price. Don't know if I really want to go through


July 13, 2012 | 03:00 PM - Posted by pastyface (not verified)

I have had the catleap for 3 weeks now and have been very impressed. Paid $286 and got free international shipping. This monitor is really unbelievable for the price and my only gripe is the response time. The good thing is that its usable for fps, just wouldn't recommend it for the hard core competitive people.

As of now I would recommend this monitor to everyone who can afford to take a chance on this things survivability. If you are the type who needs a warranty just stay away. For everyone else, this is excellent value.

July 13, 2012 | 03:24 PM - Posted by Anonymous (not verified)

Just a FYI it seems that SquareTrade will warranty these screens.

July 14, 2012 | 12:12 AM - Posted by DumpsterJ (not verified)

Ive had my catleap monitor for a few months now and I love it. its amazing in every way including the price. Still no dead pixels or any problems.

July 14, 2012 | 04:42 AM - Posted by timmyisme22

I'd be all for getting one or more, but my computer wouldn't handle it and even if it could, I have no desk space :(

The nice thing is that you could spend the same amount of money on multiple monitors here for the same price as one from our leading dealers (even the HP deal). That's always a nice thing if you get one perfect (and even better with multiple in great to perfect condition).

I just wish I had money.

Awww man. Now I just want to buy this solely for Total Annihilation! You guys are killing me!

July 14, 2012 | 06:16 AM - Posted by DisasterArea (not verified)

Remorse on the yamakasi Multi-input.

I have been testing the $400 AUD multi input model all day.
No faulty pixels, excellent colours, which make my 120hz Alienware AW2310 look like it was done in crayons.

The input lag is horrendous....

I've been running some clocks on the AW2310 / a Dell 2407WFP and the Catleap and unfortunately it's around 90ms behind the Alienware, despite having scalers turned off - the multi-input card screws everything. Totally unusable for competetive games.

July 15, 2012 | 04:36 PM - Posted by Shahab (not verified)

Yeah, I don't think the multi-input models are worth it, unless you won't be gaming on them or only playing games like RPG or strategy games.

July 14, 2012 | 10:23 AM - Posted by Anonymous (not verified)

Amazon offers a number of these monitors by the same company's. What's the advantage going to eBay?? Amazon would seem safer.

July 14, 2012 | 11:43 AM - Posted by Mechromancer (not verified)

For this little amount of money, if it dies I will open it up and replace any blown capacitors myself!

I want 3 for a badarse Eyefinity setup.

July 15, 2012 | 04:35 PM - Posted by Shahab (not verified)

I ordered a Yamakasi Catleap for $350 shipped. I have had it for probably 4 or 5 months now. It came with no dead pixels, no stuck pixels, and is a beautiful display.

I had a Dell 3007WFP-HC but it got so hot that I have actually made this my new main monitor. At some point I would like to do some sort of dual display incorporating the Dell, who knows.

In any case, LOVE my monitor, the price can NOT be beat in the US. If you are interested in this monitor but worried about buying from abroad, don't worry. The good sellers seem to be very good about defective units and the various Korean companies DO offer a warranty, you will have to ship it back to Korea to get it honored but there is a warranty.

So don't wait anymore! These are awesome monitors and you haven't lived until you've played your favorite games at 2560x1440 on a 27" S-IPS panel monitor.

July 16, 2012 | 04:32 PM - Posted by Isaac Church (not verified)

I really want one of these displays, but I want the 16 x 10 30 inch, instead of the 16 x 9 27 inch. Any info on those? I've seen them on eBay but not sure if they are worth the extra cost.

July 19, 2012 | 10:35 PM - Posted by Coming120Hz (not verified)

This is in regards to the Yamacasi Catleap Q270 2B.
I got a reply back from TA planet saying that the Yamakasi 120Hz are out of stock, however for the ones that can wait he said "Another brand, Shimian 120Hz overclock version will be released after one month."
I will look forward to talk to him again next month, hopefuly they are display port only.
By that time they will have AsRock X79 Extreme 11 motheroard. Maybe 7990 will release & will support 120hz & should give me plenty of time to research AMD for 120Hz or cheaper 2x690 & the next quadro 5000 desktop kepler & tesla. All of them freaking waterkooled of course. And be ready for world domination or learn about lots of game/cg movie making so I can justify buying all of that crap then.

July 20, 2012 | 07:07 PM - Posted by OctaveanActually (not verified)

I bought the Auria EQ276W from Microcenter yesterday. It was $399.99 USD and came to ~$414 after NJ tax. It’s a stunning multi-input (HDMI with HDCP, DVI dual Port, DisplayPort, VGA and mini audi jack) 2560x1440 display and looked great with out of the box settings. It had no dead pixels / stuck pixels or light bleed. Gloss screen but hardly noticeable IMO.

The stock picture above of the Auria EQ276W doesn’t do the outer esthetics justice as it as it really looks nothing like the picture.

I haven’t tested lag but I also don’t intend to use it for much if any gaming.

It comes with a 1yr warranty and I still have the option of returning it to Microcenter is I so whish it but I would probably be more apt to buy another one.

Presumably Microcenter will ship the Auria EQ276W so it doesn’t necessarily matter if you don’t have a store location near you.

Its price competitive with the other Korean models (specifically the multi-input models) without the risk.

July 23, 2012 | 03:39 AM - Posted by saskia (not verified)

can you please share the color calibration file you generated?? thanks!

August 10, 2012 | 04:20 PM - Posted by Markon101

I just bought one of the Catleap's. Thanks for the review, this wave of cheap Korean monitors is awesome!

December 17, 2012 | 09:13 AM - Posted by android120hz

I think this 27 inch 120hz monitor is the best monitor for people who use it for design or watching movie, but it's not the best choice for people who want use it playing games.

April 23, 2013 | 05:55 AM - Posted by Anonymous (not verified)
In here, price of monitor from $279

August 16, 2013 | 06:44 AM - Posted by Anonymous (not verified)

Here is the Amazon link for the product

They claim a One Year warranty which, because it is on amazon, surely must have to be honoured.

Any thoughts from anyone?

Great Review.

September 10, 2013 | 12:01 AM - Posted by Anonymous (not verified)

I was about to buy a crossover to place beside my 27" Apple Cinema Display until I heard that these monitors have calibration issues. Is that something to worry about? Can someone tell me how to get this new monitor to match the color to my Apple?

October 30, 2013 | 08:31 PM - Posted by Super (not verified)

Yes, there are calibration issues. With the newest Achieva Shimians. For example, you CANNOT have the backlight dimmed. By changing brightness the backlight IS NOT CHANGED and contrast is killed. Which is pretty bad if you use your monitor in a dark room. Expect, eye strains in this scenario.

November 12, 2013 | 06:15 PM - Posted by Anonymous (not verified)

hi ken,

any update on the monitor? are you still happy with it?



November 24, 2013 | 11:33 PM - Posted by Anonymous (not verified)


April 2, 2014 | 04:05 PM - Posted by Anonymous (not verified)

hi ken,
is the monitor still working for you?

September 5, 2014 | 10:20 AM - Posted by Anonymous (not verified)

Hello. I have had my Shimian 27" 2560x1440 IPS panel for 2 years now and play games (BF3, BF4) almost everyday. Haven't had a single problem from day 1.

April 17, 2015 | 09:27 AM - Posted by Chad (not verified)

I have used mine 8-9 hours 5 days a week at work. Never an issue for the last 2.5 years. Will be buying a few more for my staff.

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