T430s Display Port resolution

I have a T430s connected to a Lenovo mini dock station running Windows 7. I have just purchased a 27" monitor which supports up to 2560x1440 resolution. When connect to the monitor using a display port to DVI cable Windows will only allow a maximum resolution of 1680 X 1050. However, if I connect via the VGA adapter I can achieve 2440 X 1440 resolution. Why would this be so?
Regards,
Tom

Hi there; Why is so much crap posted here, is someone here interestet to lie about Lenovo Products, to make them look better? Or is the level too low....
I have å Lenovo T430s produced late 2012, most expencive Version, type 2356LPG. Intel Graphics 4000. I have three 27" monitors. One so called Display port or Mini Display port or whatever the different makers calls it (!!).
Monitors: 1)Samsung 27inch S27B970D Series 9 2)Asus PB278Q. Of course the monitors doesnt have det same input/port type as the PC (Grrrr!). Of course you need a converter (Grrrr!). When you Connect the dual-DVI cable from the ASUS Monitor to the Lenovo T430s, the ASUS Monitor shows an error Message "Cable Incorrect, please use Dual Link". SO, either the Output Mini Display port is not supporting 2560*1440, or the adaptor doesnt. Adaptor to HDMI same problem.
Either way - This is crap! What shall the customer do?!! Try out all the 10'000 adapters on the marked, to find one that Works?! If it will ever work, without a docking..... I have been trying to find information on the mini-display port from Lenovo. I find this forum, with incompetence, but no information.
With so many 27" monitors comming on the marked, all with more or less the same input plugs, why the heck are the produsers of the PC's so far behind!?? Not even information....no adaptors following the Product..... I also have Asus and Samsung PC's - all With different plugs.... Shall I shop an arsenal of adaptors.............?!?! And hope the best cause noone knows if it will work......... IS IT 2013 ALSO IN CHINA??
This is just to bad, chinaman!
spoilers removed

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danz0r wrote:
Hey tjk,
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Do you have any recommendations for a potential set up? The audio output and Apple DVI are on different sides of my MBP, which is alright, I guess I can get two long cables to handle each. I was hoping to just have my MBP closer to where I use it, with a cord nearby plugged in on one side to the HDTV and resting near where I keep my MBP for when I want to use the HDTV as an external monitor.
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EDIT : stopped working on iMac too… then update 10.8.2 fixed the issue. Now it works. Thanks Apple for temporarily removing some features ! It's just so ANNOYING.
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