Extended Desktop for dual monitors on Win7?


New Member
Trying to get my dual monitor extended desktop happening in Win 7, but it won't recognize the 2nd monitor. I just get a clone of monitor 1 with no option to extend it.

It worked perfectly in XP and I just upgraded to Win 7.

I have a ASUS P6TD Delux motherboard

and a ASUS ATI based card with DVI, VGa, HDMI video card.

Any tips on drivers? It says they're all up to date.


Noob Whisperer
Hello and welcome to the forums.
You probably need to include the exact Model ATI card you are using along with what ATI driver you are currently using and I'm reasonably sure one of our resident Graphics Gurus will be able to get you onto the right path to a solution. Lot of ATI users here so give us as much detail as possible regarding the hardware including monitors and hang in there.


New Member
Thanks for responding. Here's the system I just built:

Processor Intel i7 3.06 ghz QUAD
Newegg.com - Intel Core i7-950 Bloomfield 3.06GHz 4 x 256KB L2 Cache 8MB L3 Cache LGA 1366 130W Quad-Core Processor BX80601950
Motherboard: ASUS P6TD Delux
Newegg.com - ASUS P6TD Deluxe LGA 1366 Intel X58 ATX Intel Motherboard
Memory: 6gigs Triple Channel
Newegg.com - CORSAIR DOMINATOR 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMP6GX3M3A1600C8
System Hard Drive: Segate 1.5 Tb
Newegg.com - Seagate Barracuda 7200.11 ST31500341AS 1.5TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
Audio Hard Drive: WD VelociRaptor 300gb 10000 RPM drive
Newegg.com - Western Digital VelociRaptor WD3000HLFS 300GB 10000 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
CD/DVD burner:
Newegg.com - Sony Optiarc Black 24X DVD+R 8X DVD+RW 12X DVD+R DL 24X DVD-R 6X DVD-RW 12X DVD-RAM 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM 2MB Cache SATA CD/DVD Burner - CD / DVD Burners
Power Supply: Antec 750 watt
Newegg.com - Antec EarthWatts EA750 750W Continuous Power ATX12V version 2.3 SLI Certified CrossFire Ready 80 PLUS Certified Active PFC "compatible with Core i7/Core i5" Power Supply
Video Card: ASUS ATI based card with DVI, VGa, HDMI
Newegg.com - ASUS EAH5450 SILENT/DI/1GD3(LP) Radeon HD 5450 1GB 64-bit DDR3 PCI Express 2.1 x16 HDCP Ready Low Profile Ready Video Card

Monitors are 2 AOC 20 inch flat screens-- about 2 and a half years old.

Video driver is: Microsoft Generic PNP monitor version: 6.1.7600.16385(win7_rtm.090713-1255)

Hope this helps.


We take it you upgraded XP to 7 by doing clean install, right?

1. Are the monitors the same model?
2. Are the monitor drivers installed?
3. Does ATI Catalyst detect both monitors?
4. Try UltraMon to see if the issue persists.


New Member
Monitors are the same model : AOC 2019sw1

don't think the drivers are installed. Just plugged them in on XP a couple of years ago and they worked. Looked for the new drivers, but I don't see this exact model listed.

ATI Catalyst detects only one monitor, but it shows up on both screens.

Ultramon doesn't seem to have done anything to help.


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