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Add a fake / non-existent monitor?

post #1 of 6
Thread Starter 
I've read some folding threads that said that your monitor doesn't need to be connected to a physical monitor for the GPU to work in XP. In Vista onwards, you need to use the dummy VGA plug trick but in XP apparently not.

I don't have a multi-GPU rig but I'm wondering how to setup the "fake" / non-existent monitor in XP?
Any help appreciated.
post #2 of 6

Here is a linkĀ http://www.overclock.net/t/384733/the-30-second-dummy-plug

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Problem Child
(13 items)
 
TROUBLEMAKER
(14 items)
 
Alienbuild1
(13 items)
 
CPUMotherboardGraphicsRAM
i7 3930k Asus Rampage IV Extreme 7970 G.Skill 16g 1600 
Hard DriveHard DriveOptical DriveCooling
Mushkin 120 SSD WD 1TB Asus 24x XSPC Raystorm 
CoolingOSMonitorPower
EK mobo waterblocks W7 Ultimate HP LA2205wg x 3 Antec 1000 TPQ 
Case
NZXT Switch 810 
CPUMotherboardGraphicsRAM
i5 760 4.0@1.26v MSI P55-GD80 GTX 460 G.Skill 4x2gb ddr3 1600 
Hard DriveOptical DriveCoolingOS
WD 840gb Asus 24x H100i W7 Ultimate 
MonitorKeyboardPowerCase
HP LA2205wg  HP  1000 w Antec Lanboy Air 
Mouse
Microsoft Arc 
CPUMotherboardGraphicsRAM
Phenom II 955 C3 ma790x-ud4p Radeon HD 5770 OC OCZ 800 4x2gb 
Hard DriveOptical DriveOSMonitor
2-500gb WD Caviar Blue raid0 LG Super Multi 24x, Asus 24x Windows 7 Ultimate 64 LG 23" 
PowerCase
Raidmax RX630Z Logisys Case 51 
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post #3 of 6
Thread Starter 
Yeh I saw it before but there's people mentioning in that thread that it's NOT required in XP - it can be done through software alone. I'm wondering how.
post #4 of 6
Thread Starter 
So this is pretty weird and obviously I'm missing something basic in understand how resolution is produced. What I really want to do is video capture a video game higher than my monitor's native 1440x900. I thought I can "fake" a monitor's resolution so I created a VNC between the Windows 7 PC and laptop. I then disconnected the VGA cable on the GPU, VNCed in with the laptop, increased the resolution to 2560x1600 and then tried to capture the application. On doing so, I got an error saying that directdraw couldn't be enabled (the same error through a VM as it turns out) even though I could expand the application did expand to the max resolution.

I then tried another way by disconnecting the VNC completely so that directdraw would no longer be an issue and I fired the application off via the command line. I got a different error this time as: "Problem setting '0x224x163789bpp (0hz)' display mode" which I guess means something along the lines of.. couldn't start.



It seems like the GPU really does require a physical connection (at least in Win 7)? How does this work? Is it possible to create a dummy VGA plug which spoofs the gpu into thinking that the resolution is rendering successfully? If so then I guess this method would work. Any help appreciated.

I also tried the "desktop size and position" settings in the nvidia control panel. I thought you could create a higher resolution than your monitor supports, but allow the desktop to be scrolled. However there's no option in the control panel settings to increase the resolution beyond the native. I have no idea what that dialogue is meant to do. I tried everything in there and nothing allows for a higher than native resolution.. :/

Edited by delatroy - 11/5/13 at 7:19am
post #5 of 6
Thread Starter 
Anyone please?
post #6 of 6
Thread Starter 
Well if anyone cares, I manged to do it by installing a second ATI GPU and using CCC to set a pan and scan desktop.
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