Here is the catch with the TRI-SLI.  So far I have been commissioned by one person to make this block.  So he has the ultimate say-so.
 
If its just 2 cards, I think I can get water over the chip.  If its 3 cards, it will most likely be an air solution for the south bridge. 
 
I have been staring at the board on and off all weekend trying to balance between price, material selection, and ease of fabrication. 
 
There is no question in my mind that I can make a waterblock for this board.  The problem I run into is the cost & selection of materials.  Copper comes in nice round numbers, like 6x6, 12x12, 4x12, stuff like that, in any thickness.  I can actually make a full complete single copper block, but it would require a large sheet of copper which would be about the size of the motherboard itself, and have lots of scrap. 
 
The other option is to make the block in smaller sections and join them via a plastic bridge, or by way of hose barbs.  That would consist of 2 small VR sections, and the NB/SB section- or 1 larger R block, and the NB/SB sections. 
 
Then that NB/SB block would come down to either a complete water (SLI) or water/air solution (TRI-SLI). 

water for the VR's and the North Bridge are the easy part.  The conundrum is the south bridge. 

I still like the idea of split blocks, and keeping the water at the NF200 and using air for the P67. This would keep material cost down as it would require smaller blocks to start with, and less scrap. And it also allows for any card config, it seems to be the smartest option so far. The block would be cheaper to make, and fit more systems meaning more people could purchase it.

EK makes a block for gigabyte P67's, they're similar to what we're talking about here. I think the only difference is that the lower block has water covering both chips, where this one wouldn't have that.
It's priced at ~140 bucks. So I could only imagine we'd expect to see something in this area.

Hey all,
 
  I have asked Nate to look at a few things in the design but I assure you he knows what he is doing and I am leaving it up to his better judgment. To me money wasn’t an object the waterblocks were. I wanted to water cool the P67 chip and the NF 200 chip along with the Mofsets but it is looking like the best way for Nate to pull this off is to water cool the Nf200 chip and the Mofset and leave the p67 alone with the stock heat sink or to use a heat pipe design to transfer the heat to the water cooled NF 200 chip which is perfectly fine with me. If you look at what he did with the P58 micro you will see what I am talking about. I have total confidence in his design, just read the form and the thanks he has gotten over the past couple of years. I just want it to look sexy!

NICE! Can't wait to see more.

extending it off the board might be an idea. keep us posted.

nateman_doo

Getting water there is easy, getting it out of there... different story.  I could extend it to go down (right as your looking at the picture) clear off the edge of the board though...  its outside the box thinking, but someone might have a small case.

 
It's an option, you might block out a couple things this way though. Obviously the decision is up to you, and theboat. I just hope it doesn't go that way as my case wouldn't allow for that.

.

Oh WOW, nice work!
I would be interested in one of these if it's built.
I am currently considering building a PC using a P67 FTW and going all watercooling on the CPU/Video cards. WOuld be awesome to also watercool the entrie motherboard as well.
 
-Jerry
 

nateman_doo

Cool! 

 
Looks nice!!! Really can't wait to see the finished block.
Also, one more post til you hit 7,000!

Hello nateman_doo
 
very nice work for the P67 /Z68 ftw I have this mobo
 

I'm interested but can you estimate a price. i live in Iceland so the shipping is not exactly cheap,

nateman_doo

 
One MILLION dollars!

I am to for ma FTW P67 and if ma Z68 FTW is 2
I am belgium people for charge for shipping