What card do I need for HDMI at 2560 x 1440 x 60 Hz?
And according to AMD Radeon™ R5 230 Core Edition - R5-230A-CNH2 it features an HDMI 1.4a port, and has a maximum digital resolution of 2560x1600
The R5 230 would be the most modest card http://www.newegg.com/Product/Product.aspx?Item=N82E16814150718&cm_re=R5_230-_-14-150-718-_-Product
hdmi is only good for 30hz at 2560 x 1440 , you will want dp or dvi dl
Not true. https://en.wikipedia.org/wiki/HDMI#Version_comparison
Are you sure?
a r9 290x would only output 3o hz to a 2560 x 1440 monitor via hdmi , use the dvidl instead and would easily output the 100 hz it got oc to
Retrieving data ...