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Possible to build SLI like bridge for power?

post #1 of 5
Thread Starter 
I'm building a new liquid cooled rig w/ 3-way SLI and want to keep things as clean as possible. I was running the PCI-E rails and noticed that they were going to get in the way of some of my tubing (or vice versa). I got to thinking that it would be nice if I could have an SLI like bridge for the power. I've searched online to see if anyone has ever done it before but gave up after a while and decided I'd just do it. I ordered some PCI-E receptacles and plug connectors and was looking into a pcb maker that could make the pcb. However, at that point I got to thinking that what I'm trying to do might not even be possible, or could be potentially dangerous and figured I'd ask around a bit. Basically, I want to run six 6-pin PCI-E rails across a board which is then connected to my three video cards like so:

FYI, | represents the motherboard tray which the cables would pass thru via grummets to effectively hide most of the cabling.


PCB
_
||
||== Vid Card 1 connected to board w/ 2x6-pin PCI-E connectors
||
||== Vid Card 2 connected to board w/ 2x6-pin PCI-E connectors
||
||== Vid Card 3 connected to board w/ 2x6-pin PCI-E connectors
||
||
||== ~|~~~~~~~~ 2xPCI-E rails to power supply for vid Card 1
||== ~|~~~~~~~~ 2xPCI-E rails to power supply for vid Card 2
||== ~|~~~~~~~~ 2xPCI-E rails to power supply for vid Card 3

The big questions I have are:

Is this possible?

Will it cause too much heat for the pcb/traces to handle?

What size trace would I need, and what kind of PCB layout (number of layers, external/internal traces, etc.)?

How would this effect the power by the time the video card receives it, and could I damage the video cards in the process?

Does anyone know a good but affordable PCB maker?

Am I crazy?
post #2 of 5
No, totally doable smile.gif You dont even need a premade PCB, you can use a hobby one and create the 'traces' like this: http://www.overclock.net/t/1156031/redbull-fridge-for-paxeast2012-updated-12-4-fan-led-board-how-to/40_20#post_15855282

If this is something above your level, someone like me could make it for you. But the spacing would need to be perfect for it to work.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
5000+ BE 3.4G @1.447v DFI 790FX-M2RS Sapphire 3850 8G Corsair XMS2 DHX 
Hard DriveOSPower
Seagate Win7 Ultimate 64bit Antec TPQ-850 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
5000+ BE 3.4G @1.447v DFI 790FX-M2RS Sapphire 3850 8G Corsair XMS2 DHX 
Hard DriveOSPower
Seagate Win7 Ultimate 64bit Antec TPQ-850 
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post #3 of 5
Thread Starter 
Awesome! Thanks for the reply! I was honestly considering dropping it because I didn't want to pay for the custom printed PCB, but that link you sent me is perfect! I've been dabbling in electronics here and there so I think this is something I can handle, but I'll keep you in mind if I run into complications. I haven't had a time to read the complete post, but my only concern would be exposed wires. Any suggestions on how to deal w/ that? Thanks again!
post #4 of 5
Well if i were to make one i would cover it with acrylic and laser cut a logo and back-light it with LED's. The only hitch i see is that they dont make surface mount (or through hole) male PCI-E ends because they are meant to be used on the end of a wire. But i have an idea how I would fix that hiccup.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
5000+ BE 3.4G @1.447v DFI 790FX-M2RS Sapphire 3850 8G Corsair XMS2 DHX 
Hard DriveOSPower
Seagate Win7 Ultimate 64bit Antec TPQ-850 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
5000+ BE 3.4G @1.447v DFI 790FX-M2RS Sapphire 3850 8G Corsair XMS2 DHX 
Hard DriveOSPower
Seagate Win7 Ultimate 64bit Antec TPQ-850 
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post #5 of 5
You might not like it, but you could cover all the exposed wires with liquid electrical tape.
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