My computer wont let me run 3 monitors even though it picks all of them up

[NZXT Aidan]

I have got three new monitors but my computer won't let me use 3 its stuck on two even though it picks them all up I've tried changing the wires, all the screens work but only two at a time (I'm using a dvi-d to hdmi adaptor a dvi-i to vga adaptor and a hdmi cable)
you can check my pc specks at pcpartpicker http://

 

[Danimal1q2w3]

Some cards do not support three monitors even if there are ports for them. My gtx 550ti had three ports but only two at a time could be displayed

 

[Danimal1q2w3]

Some cards do not support three monitors even if there are ports for them. My gtx 550ti had three ports but only two at a time could be displayed

 

[NineFace]

For 3 monitors you'll need to have 3GB of memory but the R9 270x has 2GB. Once you have multi monitors, your GPU memory gets divided to each of your monitors(1GB or more per). So, 2 divide into 3 will not going to work. Im afraid you'll need to buy another grapic card or sell one of your monitors.

 

[NZXT Aidan]

For 3 monitors you'll need to have 3GB of memory but the R9 270x has 2GB. Once you have multi monitors, your GPU memory gets divided to each of your monitors(1GB or more per). So, 2 divide into 3 will not going to work. Im afraid you'll need to buy another grapic card or sell one of your monitors.

MY graphics card supports up to 4 monitors

 

[NineFace]

For 3 monitors you'll need to have 3GB of memory but the R9 270x has 2GB. Once you have multi monitors, your GPU memory gets divided to each of your monitors(1GB or more per). So, 2 divide into 3 will not going to work. Im afraid you'll need to buy another grapic card or sell one of your monitors.

MY graphics card supports up to 4 monitors

Yes, I know. If you you dont believe me then read other forums about 2GB graphics card running 3 monitors, you will see that it is not the best thing to do. Even higher end cards like gtx770 wasnt recommended for 3 monitors. You can do 4 monitors on 270x but its gotta be crossfire. 2GB running 3 monitors is never recommended. I had gtx760 on another system and Im still using 2 monitors because it has 2gb of memory. Sometimes you can run 4 monitors on 2gb but not for gaming tho.

 

[NineFace]

Try this mate.

turn the monitors off, reboot your computer. when the computer comes back on, Catalyst control center will let you turn all three monitors on.

Have them setup as:
1 DVI
1 DVI
1 HDMI (to DVI via adapter)

Or Watch this video >> Click here << pretty much the same. Just the name that is different

 

[manofchalk]

For 3 monitors you'll need to have 3GB of memory but the R9 270x has 2GB. Once you have multi monitors, your GPU memory gets divided to each of your monitors(1GB or more per). So, 2 divide into 3 will not going to work. Im afraid you'll need to buy another grapic card or sell one of your monitors.

That is not how it works.
Graphics memory is not split between the screens. To the graphics card, having more screens means it just has to push out a larger resolution, if you had a single monitor of equivalent resolution it would make no difference to the amount of VRAM used or how its allocated.
You dont need two cards to run multiple monitors regardless of your VRAM capacity, the only instance where you needed multiple cards was with Nvidia Surround a couple of generations ago and it had nothing to do with VRAM.

Its generally not recommended to run games across multiple screens on 2GB cards, because the larger resolution can increase VRAM usage to the point it becomes a bottleneck and in general don't have powerful enough GPU's to get adequate performance at that resolution, but there is no reason you cant.


To the OP
The reason its not using all three monitors is because for HD7000 series cards (the 270X is a rebranded HD7870) you need to use a DisplayPort connection if you want more than two screens.
http://www.amd.com/us/products/technologies/amd-eyefinity-technology/how-to/Pages/faqs.aspx#multiple-display-requirements
You need to use an Active Displayport adapter or a native Displayport connection to run three or more screens.

This should let you run all three screens
http://www.newegg.com/Product/Product.aspx?Item=N82E16815129011

 

[NineFace]

For 3 monitors you'll need to have 3GB of memory but the R9 270x has 2GB. Once you have multi monitors, your GPU memory gets divided to each of your monitors(1GB or more per). So, 2 divide into 3 will not going to work. Im afraid you'll need to buy another grapic card or sell one of your monitors.

That is not how it works.
Graphics memory is not split between the screens. To the graphics card, having more screens means it just has to push out a larger resolution, if you had a single monitor of equivalent resolution it would make no difference to the amount of VRAM used or how its allocated.
You dont need two cards to run multiple monitors regardless of your VRAM capacity, the only instance where you needed multiple cards was with Nvidia Surround a couple of generations ago and it had nothing to do with VRAM.

Its generally not recommended to run games across multiple screens on 2GB cards, because the larger resolution can increase VRAM usage to the point it becomes a bottleneck and in general don't have powerful enough GPU's to get adequate performance at that resolution, but there is no reason you cant.


To the OP
The reason its not using all three monitors is because for HD7000 series cards (the 270X is a rebranded HD7870) you need to use a DisplayPort connection if you want more than two screens.
http://www.amd.com/us/products/technologies/amd-eyefinity-technology/how-to/Pages/faqs.aspx#multiple-display-requirements
You need to use an Active Displayport adapter or a native Displayport connection to run three or more screens.

This should let you run all three screens
http://www.newegg.com/Product/Product.aspx?Item=N82E16815129011

Hmmm, really? the guy at the store told me that. So, I bought 2 graphic cards for no reason??? Dam!!!

 

[manofchalk]

Surprisingly the salesman wanted to sell more to you 😛
Not saying that having two cards wont benefit you if you are playing at 5760x1080 (triple 1080p) but there is no reason you need two cards.

EDIT: Also you seem to be under the impression that VRAM stacks in Crossfire/SLI. It doesnt, each GPU needs its own copy of the frame buffer, the VRAM isn't shared between the cards. So 2 + 2GB = effectively 2GB, not 4GB.
This applies for dual GPU cards as well, the GTX690 only really has 2GB of effective VRAM despite being marketed as 4GB (which is true but misleading).

 

[NZXT Aidan]

For 3 monitors you'll need to have 3GB of memory but the R9 270x has 2GB. Once you have multi monitors, your GPU memory gets divided to each of your monitors(1GB or more per). So, 2 divide into 3 will not going to work. Im afraid you'll need to buy another grapic card or sell one of your monitors.

That is not how it works.
Graphics memory is not split between the screens. To the graphics card, having more screens means it just has to push out a larger resolution, if you had a single monitor of equivalent resolution it would make no difference to the amount of VRAM used or how its allocated.
You dont need two cards to run multiple monitors regardless of your VRAM capacity, the only instance where you needed multiple cards was with Nvidia Surround a couple of generations ago and it had nothing to do with VRAM.

Its generally not recommended to run games across multiple screens on 2GB cards, because the larger resolution can increase VRAM usage to the point it becomes a bottleneck and in general don't have powerful enough GPU's to get adequate performance at that resolution, but there is no reason you cant.


To the OP
The reason its not using all three monitors is because for HD7000 series cards (the 270X is a rebranded HD7870) you need to use a DisplayPort connection if you want more than two screens.
http://www.amd.com/us/products/technologies/amd-eyefinity-technology/how-to/Pages/faqs.aspx#multiple-display-requirements
You need to use an Active Displayport adapter or a native Displayport connection to run three or more screens.

This should let you run all three screens
http://www.newegg.com/Product/Product.aspx?Item=N82E16815129011

thanks for that ill go and buy one and see if it works or not