I've been using a XFX HD5770 now for a few months. It's a 1 GB GDDR5 card and I play all games at 1920x1080 if using a single screen, OR 6024x1080 in a 3x1 Eyefinity setup.
My system is in the siggy below.
I love this card for its price to performance ratio and you can likely get it for less than what I paid for mine a few months ago.
~Windows 10 x64 Professional
~Gigabyte Z77X-UD5H~Intel I7-3770K~8x2 GB DDR3 Crucial Ballistic 1600 RAM (Dual Channel)~RealTek Onboard~XFX R9 390 8GB GDDR5
~3 Acer 27 inch LCDs~SCEPTRE 505 4K UHD TV
and one Sanyo 32 inch HDTV connected via Intel onboard GPU~SATA BluRay RW~1000 W PSU~And a Whole Lot More!~AND....1 TB XBOX ONE~1 PS4 with Uncharted Bundle~
If you have an issue with what you said, please resolve it in private ;)