water cooling: y junction or series setup

[LtBlue14]

(svol i'm thinking you..or are you just working with waterblocks)
anyone with a lot of experience in watercooling, do you find that running your cpu and gpu in series yields better results, or that using y junctions works better
series = water is hotter going to the gpu
y junction = less water to each component

does the fact that you're splitting the water between two tubes create problems, either with too much pressure in the main tube or with not enough in the parallel ones (because you've only got half of the water you used to..)

i've also seen it suggested that you use a T, where the straight part of the T goes to the gpu and the 90 degree turn goes to the northbridge, since you don't need as much cooling there

perhaps none of this will make more than a few degrees C difference, but you'd like to have the best setup, anyhow, wouldn't you..

EDIT: i wanted to add a few things
first is there a reason for me to have a reservoir if i'm using an inline pump, and where should i put it
second i'm looking at the hydor L30 because it's cheaper and smaller than the eheim 1250, does anyone know about the noise these things produce compared to the eheims? or if you own an eheim 1250, how would you say the noise is (the hydor is magnetic i believe, not shaft based, and magnetic is supposed to be slightly noisier. which one is the eheim?)

yeah so thanks for all that
--------------

<A HREF="http://forumz.tomshardware.com/modules.php?name=Forums&file=faq&notfound=1&code=1" target="_new">mubla otohp eht ni ecaf ruoy teg</A><P ID="edit"><FONT SIZE=-1><EM>Edited by LtBlue14 on 02/06/03 11:24 PM.</EM></FONT></P>

 

[Lonemagi]

Ive got an eheim, and it is pretty qhiet, quieter than the rest of my system. I also put a peice of rubber down before I zip tied the pump in place, which might cut out vibration to the case.

And what I have read that it is more a thing of water pressure (a few really good home made waterblocks have built in nozzles to add pressure and velocity in the waterblock).

You could always run from pump -> cpu -> radiator -> gpu -> resivoir, or even add a smaller rad to the mix after the gpu.

<A HREF="http://tekkoshocon.com/" target="_new">http://tekkoshocon.com/</A> Southeast Pennsylvania gets an Anime Convention!

 

[svol]

Ahhhhhhh... the advantages of serie and parallel I experimented with that too.

At first I was planning to run my CPU and GPU + Northbridge parallel... but this resulted in a dramatic waterflow (I had a flow meter in the GPU/NB line. Placing the whole setup in serie wasn't a good idea becaus the tubes of the GPU and NB waterblock are really small compared to my main tubes (6mm to 10mm).
So I decided to go for a combination: I placed the GPU and NB parallel and those in serie with the CPU. It works perfect although waterflow is still a little low. I think this is because my Y-adapter is of 8mm and I need to use a convertor from 10mm to 8mm. I'm planning on buying a 10mm Y-piece and see if that increases waterflow, otherwise I might try a slightly different parallel setup.

But if you mantain a good flow the heat of the water that reaches the GPU will only be slightly increased because water passes the CPU block so fast that is doesn't heat up to high levels.

Anyway this are my temps atm:
CPU: 41C on 1575Mhz (this is probably because the low flow)
GPU: 30C (waterblock temp)
NB: 21C (waterblock temp)

Too bad I'm very busy with school atm... but maybe I can do some testing after 2 weeks when I have vacation.

My dual-PSU PC is so powerfull that the neighbourhood dimms when I turn it on 😱

 

[LtBlue14]

i'm looking at a danger den setup, using 1/2 inch (12mm) tubes/connectors, and the hydor L30 (320GPH) as i mentioned

if i did the y-junction, i might use 10mm tubes for the parallel GPU and NB, taking the air out of the tubes might be hard otherwise, plus if i DID get it airtight with no air in the tubes, the vacuum created by the lack of water might make the tubes bend strangely

however, none of that will be a problem if i put it all in series, which may not be a bad idea considering the 12mm tubes and fairly high powered pump i'm looking at
what do you think?
btw i decided that a reservoir would make filling the system much easier (i don't know how it would be done without one..), and bleeding air would be easier too
--------------

<A HREF="http://forumz.tomshardware.com/modules.php?name=Forums&file=faq&notfound=1&code=1" target="_new">mubla otohp eht ni ecaf ruoy teg</A>

 

[svol]

If you can use 10mm or higher tubes on all waterblocks with that pump a serie setup will probably be the best.

My dual-PSU PC is so powerfull that the neighbourhood dimms when I turn it on 😱