Rzecz polega na tym, że karta i Twój monitor nie dogadują się automatycznie po HDMI
co do rozdzielczości, monitor nie rozpoznaje po
HDMI automatycznie, co karta mu wysyła.
Rozwiązanie to ustawić rozdzielczość ręcznie:

"The U2515H HDMI is capable of 2560x1440.
You have to create a "custom" resolution in the video card display settings":
http://en.community.dell.com/support-forums/peripher
als/f/3529/t/19626476

"We understand from a few reports that you can actually use a DVI to HDMI adapter to
output from a DVI graphics card, to HDMI input
on the monitor.
This might require a dual-link DVI > HDMI converter given the resolution and you may
need to create a custom resolution from your
graphics card as it seems the 2560x1440@60Hz is not automatically detected.
It does seem to work though, providing compatibility with DVI graphics cards at
least.
DVI to DisplayPort is more tricky and would require an active adapter which can be
quite expensive and may be more hit and miss":
www.tftcentral.co.uk/reviews/dell_u2515h.htm


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"z" <...@...pl> wrote in message news:55bbb7ad$0$8372$65785112@news.neostrada.pl...
> Opierałem się na tej specyfikacji:
> www.asus.com/Graphics-Cards/EAH4350_SILENTDI512MD2/s
pecifications