parallel gpu blocks

[penguins]

highres:http://www.paddedcellinc.org/~shane/...ock+config.jpg

is this a correct configuration of 2 parallel cards? i swear i've seen a bunch of people say that it's better than one tube going between them, but after searching for a couple hours about i can't quite find anything. they're 2 DD 8800GTX blocks.

Is there something i should be doing different? this configuration reeeeealy works well with the space i have in my case.

( i know the compression fitting aren't on right, I'm only in the Look portion of the tubes seeing if this is okay or not )

again, i searched for a couple hours about this and i either suck at searching ( i prolly do ) or something else : ).

[Slowb00st]

highres:http://www.paddedcellinc.org/~shane/...ock+config.jpg

is this a correct configuration of 2 parallel cards? i swear i've seen a bunch of people say that it's better than one tube going between them, but after searching for a couple hours about i can't quite find anything. they're 2 DD 8800GTX blocks.

Is there something i should be doing different? this configuration reeeeealy works well with the space i have in my case.

( i know the compression fitting aren't on right, I'm only in the Look portion of the tubes seeing if this is okay or not )

again, i searched for a couple hours about this and i either suck at searching ( i prolly do ) or something else : ).

Nope you have to switch the inlet and/or outlet they can not be on the same "tube" the way you have it the water will completely bypass the cards.

you need:

plug 90
link link
90 plug

or

90 plug
link link
plug 90

[Geezer]

I have to agree...having an interconnect on both ports between cards isn't likely to improve performance. You're basically giving the water a straight line shot passing by both blocks without circulating through them.

With most GPU blocks I've seen, water enters the block through one port and then is forced to circulate around inside the block before it can exit the other port. This is done by physically blocking the flow of water so it can't just scoot sideways from one port to the other and then out. You're bypassing that intentional blockage by having the left interconnect (based on your picture). Remove the left interconnect, leave the right one, and water is forced through the block of one card, then through the interconnect, then through the second card, then out.

With both interconnects the way they are in that picture, water entering the first block has two options: (Assuming the bottom card is the first one in the loop and water exits the assembly through the top card).

1) Push the water that came before it through the block, then through the right interconnect, then through the second block, then up.

2) Push the water in the left interconnect up and then exit through the top.

On the other hand, if the loop is set up so that water is entering the top card first and then down through the bottom, I would expect it would be even worse because you'd have the added issue of gravity encouraging the water to just go straight down without circulating through the blocks.

Water will take the path of least resistance (just like me ), which means the flow through the blocks with your current setup will be slow at best, stagnant at worst.

[Section8]

Yeah you have to have the inlet and outlet on separate sides like this



Also I have tested this same parallel setup with the inlet and outlet on the top card because I didn't have a 90 degree at the time for the bottom card and the temps were about the same. This setup with the inlet on one card and the outlet on another is the preferred method though.

[penguins]

so you're saying the same middle part, just move one 90* to the other port? your picture is pretty crazy dark and hard to see, so idk if each card has a bridge in the middle or not? like change my top 90* to the port to the left?

[Biffa]

Yeah move fitting in the bottom card to the rear most port.

You can get away with both fittings connected to the top two but its not as efficient, but by having the two connected on the same side like that the water will just go straight down and out without going into the blocks.

[Section8]

so you're saying the same middle part, just move one 90* to the other port? your picture is pretty crazy dark and hard to see, so idk if each card has a bridge in the middle or not? like change my top 90* to the port to the left?

Yes keep them the same in the middle just move your bottom fitting over to the other side. Mine is hard to see because my links that connect each card are clear polycarbonate Bitspower SLI fittings

[penguins]

i think it's hard to see cause the lights are off : ). but that's just me! thanks i'll switch that up... : ) just bled the CPU Loop i think i like DDCs on 5v aLot better than 12v.. man tehy just create air bubbles on 12. lol..