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2560x1440 on AMD Radeon HD 6650m with HDMI interface?

Last response: in Graphics & Displays
April 3, 2012 7:08:35 AM

Hi everybody!

So here's the problem I have, I would really appreciate it if somebody could give me a hint!

I have an Acer Aspire 7750G Laptop, wich integrates and AMD Radeon HD 6650m graphics card, with an HDMI interface. I was considering buying a 2560x1440 27" screen, but doing some research, I found out that the HDMI interface can only output a max resolution of 1920x1200.

The technical specifications of the card state that the card's maximum supported resolution is 2560x1600, so the card is actually able to output this resolution. The problem is the HDMI interface.

If the laptop had a DVI connector, theoretically there should be no problem.

So, the question is: do you guys think it would be possible to use the full resolution of my new 27" monitor if I connect it to my laptop using a DVI-to-HDMI adaptor?

A 27" monitor is a big investment. If I'm not going to be able to use it at its fullest potential, then I think I'll settle down to a more standard 24" 1080p monitor.

Thanks! Any help will be greatly appreciated!

More about : 2560x1440 amd radeon 6650m hdmi interface

April 3, 2012 10:59:15 AM

If you would use an adapter, I think you will be stuck at The 1920x1200 still like the HDMI. I think you need to have a Dual Link ports or DP to have that big resolution.
April 3, 2012 11:31:19 AM

I did some googling and looks like 7750G comes with analog vga output as well, the max supported res of 2560*1600 is likely through that one instead
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April 3, 2012 11:43:15 AM

Yes, my laptop does have a VGA port. So, you think the VGA port would be able to output such a big resolution? I thought that VGA supported up to 2048×1536px.

By the way, I did some research, and it seems that HDMI 1.3 and 1.4 support 2560x1600, and even bigger resolutions:

Now, I think I just might have answered myself. I'll have to check whether the HDMI port I have is v1.3 or v1.4.

Now, if it is, how likely you guys think would it be that I would be able to have this resolution with an HDMI-DVI adapter?
April 3, 2012 12:02:08 PM

ah you are right about the max res vga supports...

edit and looks like the 'high speed hdmi' is quite decent after all:
from the 7970 specs listed at newegg
Max Resolution
4096 x 2160 (HDMI)
4096 x 2160 (DisplayPort)
2560 x 1600 (DL-DVI) details tab

edit2 looks like most of the adapters are single link dvi, some few that mention dual link look exactly the same which makes me doubt them. As far as I understand signaling is the same in single link dvi and standard slow speed hdmi (1.2?), but the higher speed versions are different since dual link actually adds an extra set of wires, and high speed hdmi just increases the frequencys :/ 
It might need some sort of active adapter, havent seen any of those...
April 3, 2012 1:45:12 PM

Ok, so it seems that if I want a resolution higher than 1920x1200 through my HDMI connection, I will need a monitor that has a HDMI port. No conversion between HDMI and DVI is possible in resolutions above 1920x1200.

Oh well! Well, at least I didn't buy the monitor to found out later that I was not getting the full resolution.

Thank you all for your help. I really appreciate it!
April 3, 2012 3:37:49 PM

OK nice! Welcome, just don't hesitate to ask us when you don't know what monitor you should get :) .