Reddit mentions of Accell Mini DisplayPort to DVI-D Dual-Link Adapter - 36 bits Color Depth - AMD Eyefinity Technology validated - HDTV Compatible - USB Powered - Supports Single-Link

I would go this route instead:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Type|Item|Price

----|:----|:----
CPU | Intel Core i7-4770 3.4GHz Quad-Core Processor | Purchased For $199.99
CPU Cooler | Corsair H75 54.0 CFM Liquid CPU Cooler | $69.99 @ Amazon
Motherboard | MSI Z87-G45 Gaming ATX LGA1150 Motherboard | Purchased For $109.99
Memory | GeIL EVO POTENZA 8GB (2 x 4GB) DDR3-1600 Memory | $63.99 @ Newegg
Storage | Crucial M500 240GB 2.5" Solid State Disk | Purchased For $109.99
Storage | Western Digital BLACK SERIES 1TB 3.5" 7200RPM Internal Hard Drive | Purchased For $49.99
Video Card | XFX Radeon R9 280X 3GB Video Card (2-Way CrossFire) | $309.99 @ Amazon
Video Card | XFX Radeon R9 280X 3GB Video Card (2-Way CrossFire) | $309.99 @ Amazon
Case | Corsair 400R ATX Mid Tower Case | $79.99 @ Amazon
Power Supply | EVGA SuperNOVA 750W 80+ Gold Certified Fully-Modular ATX Power Supply | Purchased For $79.99
Optical Drive | Samsung SH-224DB/BEBE DVD/CD Writer | Purchased For $14.99
Operating System | Microsoft Windows 8.1 (OEM) (64-bit) | $69.99
Monitor | QNIX QX2710 Matte 60Hz 27.0" Monitor | $289.90
Monitor | QNIX QX2710 Matte 60Hz 27.0" Monitor | $289.90
Monitor | QNIX QX2710 Matte 60Hz 27.0" Monitor | $289.90
Other| Active Mini Displayport to Dual Link DVI| $85.00
| | Total
| Prices include shipping, taxes, and discounts when available. | $2423.58
| Generated by PCPartPicker 2014-04-16 21:19 EDT-0400 |

In CrossFire you won't get any video output from the second card so you have to use an adapter to hook up the third monitor via mini displayport:

http://www.amazon.com/Accell-B087B-003J-UltraAV-miniDisplayPort-Dual-Link/dp/B0030XMREG

You are pretty farked as to how this setup will work.

Way 1: $160 HDMI->mDP scaler + another $86 active mDP > DVI-D (that supports 1440p, there a lot of $30 1080p DVI-D scalers). Who knows if this chain will work with two sets of processing fucking up your origina, less than glorious, 720p output.

http://www.amazon.com/AT-HD620-Mini-displayport-Stereo-Audio-Scaler/dp/B003WT9SY0/ref=sr_1_5?ie=UTF8&qid=1345435900&sr=8-5&keywords=hdmi+scaler+1440

http://www.amazon.com/Accell-B087B-003J-UltraAV-miniDisplayPort-Dual-Link/dp/B0030XMREG/ref=sr_1_12?s=electronics&ie=UTF8&qid=1345436115&sr=1-12&keywords=mini+display+port+to+dual+link+dvi

Way 2: Return your Korean monitor ($100 shipping + restocking). Pay $100 more for one with a built in scaler, hdmi, displayport.

Your monitor won't accept 144 Hz over HDMI, so you're stuck using DVI. Keep in mind we're going to need DUAL LINK DVI, single link can't do 144Hz.

Now, since your PC doesn't have DVI, this is gonna be quite expensive.
Mini-DP to Dual-Link DVI adapters are active, which means they have a bunch of electronics inside. Looking around a bit it looks like the starting price for a legit adapter is at least $75.

EDIT: Here's an adapter with good reviews and people reporting it will indeed do 1080p@144Hz. (Amazon link)

For that extra $75-$100, you can return the monitor (if you just got it) and get a better model like the XL2430T, which includes Displayport. Then you just need a cheap ($10) adapter for MiniDP-to-DP.

tl;dr Do your research next time before you go out and buy stuff you can't even connect properly to your computer.

I'm sure it can, but you will almost certainly need an active MDP-DLDVI adapter (the one that requires the adapter to be plugged into a USB socket for power as well as the mini displayport port). The Apple one runs $100, there are others but they're not much less when new - you might be able to find them for less on ebay, etc.

The ~$20 'claimed active' cables won't give you WQHD or 30" panel native res. They'll only go up to the single-link limit, i.e. FHD.

I don't think you can use adapter unless it's an active one like: https://www.amazon.com/dp/B0030XMREG/ref=twister_B008F6BS6Q?_encoding=UTF8&psc=1

The only active one that I can find on Amazon Germany is this one and I dont know if it supports 144hz https://www.amazon.de/B087B-003J-UltraAV-Adapter-Display-Dual-Link/dp/B0030XMREG