connecting laptop to monitor with HDMI to DVI-D gets low resolution

I have an HP DV7-2270us laptop, it comes with an ATI Mobility Radeon HD 4650
video adapter. I am connecting it to a Dell 3007wfp monitor using an HDMI
(on the laptop) to DVI-D (on the monitor cord) connector. This works, except that
the maximum resolution on the second monitor is 1280 x 800. How can I get this
to a higher resolution, or is that not possible?
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you might be able to increase the ram assigned to the card, but I believe you're stuck as you can't upgrade the card on a laptop without disassembly.

If you're up for disassembly, you can browse ebay for a laptop video card for your laptop with more video ram.
The max resolution for the ATI HD4650 is 1920x1200, the max resolution for the Dell 300ywfp is 2560x1600 .  It sounds like you may have a corrupt driver or not all of the ATI Catalyst software is installed.  I would download tell latest ATI Catalyst package, install it and see what happens.  Also are you running this as an extended monitor or mirror monitor?
lfrohmanAuthor Commented:
extended monitor. Yes I downloaded the latest catalyst package and tried to install it, but
it crashes. I spent a couple of hours googling and trying to get it to run, but it always
crashes. I don't know if that will even fix the problem. The driver I have is 7/2/2009,
and the latest catalyst is 2010.
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lfrohmanAuthor Commented:
disassembly - no, is there a service that does that? Like geek squad?
What O/S are you running on this?
lfrohmanAuthor Commented:
windows 7 home premium 64 bit
how much ram does the video card have on your unit?
lfrohmanAuthor Commented:
1024 MB
Does it give you the option to show resolutions it can't handle?  Also what is the refresh rate you are running at?
lfrohmanAuthor Commented:
option to show resolutions it can't handle - yes I tried that, but it did not show anything new.
refresh rate is 60 hz - only option available
The 30" dell monitor you are using only supports 2 resolutions 1280x800 and 2560x1600 other resolution will not work properly. To get its max res of 2560x1600 you need a video card that supports dual link dvi and a dual link dvi cable, with out those the best you are going to get is 1280x800.

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The Dell 3008wfp however supports many more resolutions.

lfrohmanAuthor Commented:
is there an external video adapter that I can use with my laptop that can give me 2500x1600?
Or is it possible to change the internal video card?
There's nothing I have heard of thats currently for sale that will do 2560x1600
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