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From: JohS on 26 Feb 2010 16:33
Hi. Wonder if any has some tip regards how to use my Toshiba Qosmio Laptop
with 1440�900 resolution to serve my external Monitor Dell 30''
UltraSharp 3008WFP with 2560 x 1600 (is an external graphic card an
option?)? JohS


From: Pen on 26 Feb 2010 16:54
On 2/26/2010 4:33 PM, JohS wrote:
> Toshiba Qosmio
No. The internal video either supports that resolution or it
doesn't. check with Toshiba about what external monitors it
supports with your particular machine, since you didn't tell
us what it is.
From: Conor on 26 Feb 2010 17:19
On 26/02/2010 21:33, JohS wrote:
> Hi. Wonder if any has some tip regards how to use my Toshiba Qosmio Laptop
> with 1440�900 resolution to serve my external Monitor Dell 30''
> UltraSharp 3008WFP with 2560 x 1600 (is an external graphic card an
> option?)? JohS
>
>
Plug it in, go to the display options and set it up.

--
Conor
I'm not prejudiced. I hate everyone equally.
From: Paul on 26 Feb 2010 19:01
JohS wrote:
> Hi. Wonder if any has some tip regards how to use my Toshiba Qosmio Laptop
> with 1440�900 resolution to serve my external Monitor Dell 30''
> UltraSharp 3008WFP with 2560 x 1600 (is an external graphic card an
> option?)? JohS
>
>

3008WFP:

Signal Input HDMI, 2xDVI-D, VGA, DisplayPort

http://support.dell.com/support/edocs/monitors/3008WFP/multlang/QSG/WEST/QSG_WEST.pdf

*******

2560x1600 is a dual link DVI resolution, requiring a
graphics device that support dual link interface. This
article has a table near the bottom, that defines
some reasonable limits for the two flavors of DVI.
Your laptop may not have a dual link DVI, in which case,
the resolution may have the lower limit.

http://en.wikipedia.org/wiki/Digital_Visual_Interface

Single Link DVI

WUXGA (1920 � 1200) @ 60 Hz with CVT-RB blanking (154 MHz)

Dual Link DVI

WQXGA (2560 � 1600) @ 60 Hz with GTF blanking (2 � 174 MHz) (30-inch)

If your laptop had HDMI connectors, HDMI has limits too.
The limits are based on frequency, rather than changing
the pin definition of the connector.

http://en.wikipedia.org/wiki/Hdmi

"HDMI 1.0 was 165 MHz, which was sufficient for supporting
1080p and WUXGA (1920�1200) at 60 Hz."

"HDMI 1.3 increased that to 340 MHz, which allows for higher
resolution (such as WQXGA, 2560�1600)"

The odds of your laptop having DisplayPort are limited.

http://en.wikipedia.org/wiki/Displayport

And VGA on the monitor, has its own limitations. VGA quality
may be poor, at such high resolutions. Digital is the way to
go in this case. VGA would be a poor substitute. Dell
recommends 1920x1200 on VGA, which would not be a match
for the native resolution. (It would still work, just the
DVI/HDMI options would look better.)

It really depends on the exact specifications and connector
choices on your Qosmio, as to what resolution choices you can
expect to work.

*******

As for adding display devices to your laptop, laptops have
PCCard or ExpressCard slots.

There are still no ExpressCard video cards, to my knowledge.

There were a couple prototype "expansion box" products, that
did not make it to market. (Asus made one of them.)

Magma is a company, that has been making expansion boxes,
and they offer products which allow adding hardware. But the
boxes are so expensive, it would be cheaper to just buy a
new laptop with a better set of external connectors.

Take this box for example. You plug an ExpressCard/34 module
into the laptop. An extension data cable runs to the expansion
box. A low power PCI Express video card is plugged into the
expansion box. As long as the low power PCI Express video card
has dual link DVI, you're ready to drive out 2560x1600. For
example, one of the latest offerings of ATI, in their desktop
video cards, would likely do what is required. The power supply
in the expansion box in this case, has a 55W limit for the
video card placed in the expansion box. That is not nearly
enough, to drive any "gamer" PCI Express video card. The
video card used, has to be selected for low power consumption.

http://www.magma.com/expressbox1.html

Example of the kind of video card that might work in the expansion box.

http://www.amd.com/us/products/desktop/graphics/ati-radeon-hd-5000/hd-5450-overview/Pages/hd-5450-specifications.aspx

# Typical power: 19.1Watts
# Idle power: 6.4Watts

The ExpressCard slot on the laptop, only supports PCI Express x1
or 250MB/sec bandwidth for data movement. When driving a 2560x1600
screen, you may expect to see some "stuttering" when moving large
windows around the display. That would likely not be as evident,
with the graphics built into the laptop itself. So after spending
all that money on the external adapter box, the results would
still be less than ideal. And if they made an actual ExpressCard
video card, it would have the same issues.

When you own a 3008WFP, you make your laptop purchase, around
the required interface characteristics needed to properly
drive the monitor. The monitor will look very nice, if fed by
the proper high bandwidth digital interface.

Paul

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