haha...if my experiment fails .. at least I won't be alone right BrianW. :D

Just got my 2nd pump yesterday...still waiting for my blocks though. Maybe if u wait a little longer, I could tell u if our little theory works or not :) That might help u save some dough. :p

Do remember, tubing does matter for high flow rates. There was a tubing recommendation graph that I say somewhere b4. I think it went somewhere along the lines of 1000lph 1/2" tubing 2000lph 3/4" tubing. Thus, I might give my CPU block a 16/22mm tubing straight from the pump. Once the water goes inside the block, there is nothing much I can do anymore.....:shrug:

Reducing one part of your tubing run will not help much. You want your tubing to be minmial in genral. This is the most important factor in the design stage. Eliminate lengthy tubing runs. If you have really long tubing runs, over 2 feet, I would run those in paralel to reduce the pressure drop. You could also find a way to do long tubing runs with much larger hose, but that becomes difficult.

BrianW

Keep in mind SIN the main purpose of this is to make a multi block system perform the same as a single block system. The overall flow I predict would be around 8-10lpm, with the block fows somewhere near 4-5 lpm each. This is more of a target than true prediction.

BrianW

I await expectantly for your results :)

The pic attached is how i would set it up:


The the extra line coming out of the outlet of the radiator is for recirculation, you use the valve to fine tune how much water you want going to the blocks, any unused water gets returned back to the tank, which is has been cooled by the radiator already. This makes it so theres more flow through the radiator than the blocks, therefore it's easier to cool down the water.

For this to work you should probably run 1/2 tubing from each pump, when they join, go to 5/8 or 3/4 to the rad, then out of the rad run 1/2 to the blocks, and make the recirculation line 1/2 as well.

With this setup you could get a ton of flow through the radiator, and plenty through the blocks, and still some to recirculate to cool the water down more.

Running the pumps in paralel will do nothing to minimize the head. In that setup i would run them in series, or just use one large pump. The valve is a good idea if you have a very restrictive type rad. Like in airspirits case. His valve worked out pretty good.

BrianW

A restrictive rad doesn't really help this setup. The point of the setup is to have a VERY free flowing rad, so you have more water going though it than the blocks do. The valve and recirculation line allows you to have more water passing though the radiator.

I think the pumps in paralell would help the flow, IF you went with 1/2 tubing from each pump, then joined them in a single 3/4 line, if you used 2 half inch lines into 1 half inch line, you would be choking off the flow.

Yeah his valve was before the radiator. I see how your setup will let the radiator cool the water more, but from the various flow charts I have read once you have a large radiator with decent airflow, you will be at .015 C/W, so the blocks will be more limiting to total system performance.

Also, whatever flow gets redirected back to the res, will be taken away from the potential flow of the waterblock run. Therefore decreasing your waterblocks performance, while increasing radiator performance minimaly. IMO

BrianW

The extra cooling from recirculation might make up for the less flow (in the case that you used 2 high flow pumps) ?

Also, mag drive pumps have barely any pressure, so it's hard to force the water at maximum flow rate though the system, so the recirculation valve in theory would use water that wouldn't have been used in the first place since flow rate would peak out, unless you raise the pressure.

If you had the same setup with pumps that would put out a few PSI of pressure, then you would want all the water going to the blocks since theres enough pressure to move it all through without it slowing down. A recirculation valve with high pressure pumps would hurt performance since pressure is lost.

These are just ideas though.......

There will be little to no extra cooling. The rad is almost working at its optimum already. Like I said a large heater core already is working @ .015 C/W.

BrianW

Brian,


In case you missed it, WC101 (www.wc101.com) just reviewed a bay cooler that might come in handy. ;)

Hehehe, in case you missed my sig..... Hahahaah that is too funny. Any way I am pretty sure I will be going with dual reservoirs on this one.

BrianW

Oops, my bad!

After using up 6 drive bays for PSUs;) , I just hate to see a fellow use one unecessarily. :shrug:

You're going to post a pic, right? :cool:

On my next rig the reservoirs will be made by me. My first was also made by me, although with the new config in my current box, I opted for a premade one.

I have no digi.... I am trying to borrow a buddies.

BrianW

I have done one better than that. i am running a 2 loop system also, but each loop has it's own rad & pump. I have the cpu loop running just the cpu block, and the gpu loop runs the gpu/chipset blocks. On the cpu loop i have a thermochill rad with 4 120mm fans on it and the gpu loop has a bix 2 with 4 fans on it. Both loops share a quad bay res. I have all of this in a full tower case that has been cut up to fit the rads. I had to move my 2 hdd up into the upper portion of the case and hung the bix 2 from the ceiling or the tower. the pumps are ehiem and a danner mag. my temps are lower than they have ever been. At full load I run 5.5 - 6 above ambient room temp.

system specs:

AMD 1700 @ 2405Ghz, vcore @ 1.95
1 gig pc 3200, fsb @ 200
custom RBX water block (cpu), DD maze 4 GPU (on 5900U)(btw 5900 oc'ed @ 575/1.1Ghz), and dd z-chip

Nice setup dude :)

As for me .. i've leaving most of my stuff out of the casing ... cause I don't want to clutter it up with too many runs of tubing.

A requirement for me is to have everything in the case. I often go to LAN parties. Another requirement is to use only one large Heatercore. That reason is because I already have it. I can not wait to try this out, unfortunately I will have to wait for some fundage. I just built a new game server for our clan, and not too many donations were received from our ungrateful members....

BrianW

Those darn ungratefull members!!! :mad: :)