HELP! Parallel Dual-GPU Setup (Watercooling)

Take another look both circulate around the whole block the flow layout has to cover all the hot areas, excellent choice going the Heatkiller route by the way.

I am curious do you think a parallel cooling route will cool better than a series route?

Either way you run it the primary card will always run the hottest it's doing more work, here's my 580GTX setup in series, load temperature is 40c below the stock cooling fan setup on both cards.

Thanks.  

Nope, I'm well aware that series and parallel both have similar, if not the same performance. The parallel is just an aesthetic factor for my build. The 7970 seems to be only cooling one area per one inlet the way I see it, as it looks like the water doesn't circulate around the whole block, but rather only one area, whilst the other area seems to be getting flowrate from another inlet

Oh I see, I wasn't aware of that, thanks a lot for pointing that out man   I still have plenty of things to learn about in watercooling  

Will do, thanks!

**here's my 580GTX setup in series, load temperature is 40c below the stock cooling fan setup **

I should point out Ryans set up is far from standard btw, not everyone is going to get as good a drop on their cards as he has managed, its too much work for them  
Moto

Well aware, I saw his [overkill] setup thread months ago    

  overkill - but thas some good overkill!

Its not overkill hehe, in W/c, there is no overkill, only over-radding  
Moto

  great rule!

I don't think that's the first time I've heard that..  

Thanks for the compliments guys! Ry

The only downfall in a parallel GPU setup is that if you have blocks that are overly restrictive, the water will always follow the path of least resistance, which can cause the first block to become somewhat starved for flow, especially when filling and bleeding a loop. Airlocks can be common, so just be aware of that when filling and purging air. Once you get past that, you shouldn't have any issues.

Parallel does have advantages in restrictive block setups over serial as flow drops by 1/2 with each parallel split, but restriction does as well, also. Due to the drop and equalization of restriction over 2 blocks simultaneously (vs. each block in succession) your overall flow rate should be marginally better through multiple blocks.

a valid point, if paralleling your loop try to keep the resistance on each line as equal as possible. try to prevent the water from flowing in one side faster than the other side. i found that by putting the most restrictive part first in each side or lane of the parallel loop, it really did not matter the order the blocks afterward. as long as the total distance traveled by the water is about the same on both or each side. my total system flow rate was increased or doubled. there by relieving the stress on my pump and the amount of pressure/vacuum on the system itself is considerably less.

It's like a dream come true! :'D
http://www.pccasegear.com/index.php?main_page=advanced_...
Looks like my E-mail to PCCG wasn't in vain after all  

Best answer selected by -Jackson.

Yay fer shiny blocks :-)
Moto

thanks for the BA man

No problem  

Thanks everyone for contributing!