video card for 2560x1440

[Vu Pham]

The old video card uses the NVidia GT630, and the new one has Radeon 
6450. I uses the stock drivers with Fedora 17 with Gnome.

This desktop multi-boots Windows 7 and Fedora. The problem happens in 
both platforms at 2560x1440 with both video cards. All work well at 
1920x1080.

Thanks,
Vu

On 11/17/2014 10:46 AM, Lonni J Friedman wrote:
> Specifically what kind of video card are you using and which X driver?
>
> On Mon, Nov 17, 2014 at 8:38 AM, Vu Pham <vu at sivell.com> wrote:
>> Hi all,
>>
>> I just got a 2560x1440 monitor. It works fine with my notebook, in the
>> meaning that the texts/pictures are clear and easy to read at the resolution
>> 2560x1440.
>> When I tried my desktop with that monitor, its video card ( some cheap video
>> card ) supports that resolution, but the screen quality is very bad.
>> Thinking that the card might be too old, I ordered a new ( but still cheap )
>> video card that also supports that resolution, and I still have the same
>> problem. This happens with both HDMI and DVI connectors on both video cards.
>>
>> So what criteria should the video card need to have to support a good qualty
>> 2560x1440 ?
>>
>> Thanks,
>> Vu
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>
>