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Windows 7: Extending or showing desktop on more then 2 monitors.

04 Nov 2009   #1

Windows 7
Extending or showing desktop on more then 2 monitors.

Is it possible?

Here are my specs.

I want to output on both HDMI and VGA

HP dv7-2078ca PC Specifications

Product Name
Product Number
2.00 GHz Intel Core2 Quad Processor Q9000
Microprocessor Cache
6MB L2 Cache
Memory Max
Video Graphics
ATI Mobility Radeon HD 4650
Video Memory
Up to 2815MB (1024MB dedicated)
Hard Drive
1TB (5400RPM)
Multimedia Drive
LightScribe Blu-Ray ROM with SuperMulti DVD±R/RW Double Layer
17.3” Diagonal HD+ High-Definition HP LED BrightView Widescreen Display (1600 x 900)
High speed 56k modem
Network Card
Integrated 10/100/1000 Gigabit Ethernet LAN
Wireless Connectivity
  • 802.11a/b/g/n WLAN (13)
  • Altec Lansing with SRS Premium Sound and Sub-Woofer
101-key compatible with full size keyboard with integrated numeric keypad
Pointing Device
Touch Pad with On/Off button and dedicated vertical scroll Up/Down pad
PC Card Slots
1 ExpressCard/54 Slot (also supports ExpressCard/34)
External Ports
  • 5-in-1 integrated Digital Media Reader for Secure Digital cards, MultiMedia cards, Memory Stick, Memory Stick Pro, or xD Picture cards
  • 4 Universal Serial Bus (USB) 2.0, 4th port shared with eSATA
  • 2 Headphone out
  • 1 microphone-in
  • HDMI
  • 1 VGA (15-pin)
  • eSATA + USB 2.0
  • 1 RJ-11 (modem)
  • 1 RJ -45 (LAN)
  • 1 notebook expansion port 3
  • 1 IEEE 1394
  • irewire (4-pin)
  • 1 Consumer IR (Remote Receiver)
Other Devices
16.2" (W) x 10.9" (D) x 1.37" (min H)/1.70" (max H)
7.67 lbs
  • Kensington MicroSaver lock slot
  • Power-on password
  • Accepts 3rd party security lock devices
  • 120W AC Adapter
  • 8-Cell Lithium-Ion battery
What's In The Box
HP Mobile Remote Control

My System SpecsSystem Spec
04 Nov 2009   #2

64-bit Windows 10 Pro

Hello Duckling,

As long as you have a monitor connected up to each of the HDMI and VGA ports on the graphics card, then yes you can.

You would right click on the desktop and click on Screen Resolution to make the changes per monitor like below to extend the desktop on to each monitor.

Extending or showing desktop on more then 2 monitors.-display.jpg

Hope this helps,

My System SpecsSystem Spec
05 Nov 2009   #3

Windows 7

Hmm for some reason it only lets me use 2 monitors...

I try and it automatically only choose to work with 2 monitors.
My System SpecsSystem Spec

05 Nov 2009   #4

64-bit Windows 10 Pro

Could you post a screenshot of your settings? It may help determine what may be happening.

Do you have the latest 9.10 ATI drivers installed for your graphics card?
My System SpecsSystem Spec
06 Nov 2009   #5

Windows 7

Where would I go to get you that screen shot?
My System SpecsSystem Spec
06 Nov 2009   #6

7600.20510 x86

Unfortunately, no. If you only have one graphics card, it can not output to 3 monitors at one time. At least not the 4xxx series. I believe the 5xxx series allows this, though.

The reason it can't work is because two of the 3 ports share the resources...meaning the card is physically not able to create 3 images at once.
My System SpecsSystem Spec

 Extending or showing desktop on more then 2 monitors.

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