Detecting problems

[joaosilvaa]

Hi there, i work in a club which have projection mapping in walls.

my main problem is the projection detection because i have 5 projectors connected to 2 computers individually, so i use all my graphics card outputs...

the setup for each projector is simples, 60ft of VGA cable connect to each output of the graphics card(nvidia gforce gtx660) with convertors (hdmi to vga, dvi to vga and displayport to vga). i know this isn't the right way to do it, but the Matrox are to expensive to the club...

MAIN PC (3 projectors 1280x800)
SLAVE PC (2 projectors 1280x800) - i control the slave pc through OSC so i only need to use 1 pc to perform.

My question is:
what is the best cheap way to connect all the projectors only to 1 pc?
the detecting problems are because of the convertors? or the lenght of cables ?
where i can find good active adaptors to eliminate this problem?

reggards

[Oaktown]

what is the best cheap way to connect all the projectors only to 1 pc?

Buy an AMD Eyefinity 6 card with 6 miniDP outputs (5870, 7750 or 7870)

the detecting problems are because of the convertors? or the lenght of cables ?

For anything longer than 15ft you should get VGA amps otherwise you get analog degradation. I've use the Trulink 29503 for years (now C2G / Cables To Go 29503) and they work great up to 200ft.

And remember that when you use amps, analog is source>short cable>amp>long cable>projector whereas digital is source>long cable>amp>short cable>projector

where i can find good active adaptors to eliminate this problem?

I use the Accell B101B (002B from miniDP and 003B from DP)

[joaosilvaa]

Can you explain this better?

And remember that when you use amps, analog is source>short cable>amp>long cable>projector whereas digital is source>long cable>amp>short cable>projector

i got i bit confused.

My setup is > Projector > short cable > VGA F:F (female to female) > long Cable > Active adaptor (cheap) > PC.

And about 5870 Eye infnity, i think i got a friend who can sell me one, but this one can handle a resolume composition in 2560*800 ?

if i buy the amps how much im gonna need?

thanks for repply.