Is It Possible To Have To Much GPH With a Water Pump ?

[mEKbOY]

I may get new danner mag pump that puts out 2400 Gph. Can there be to for the bad or is more flowrate better?

[William]

yes, too much can cause the temps to rise as the water is flowing so quickly it can't pick up the heat. That sounds like too much unless you are going with a Giant cooling tower where the head will slow the pump down a lot.

[mEKbOY]

So whats a good amount of flow to have with a standard not pelted setup. I was also considering one of those eheim 600pgh pumps.. i thinks its the 1060 model.

[Burning Phoenix]

I made a home made water block last year and used a beckett 325 GPH submersible pump in 5 gallon paint bucket filled with water. I was able to maintain -10 to -15 C W/ 72 watt peltier. I also had an adjustable outlet valve to which i had turned down to restrict the flow for i thought i had too much GPH flow. The above was running p3 700 @ 1022.

[William]

600 to 700 is very good. Colin uses a Danner 700gph pump but I believe that several people here have excellent results on that eheim pump you have mentioned.

[train22]

Originally posted by Burning Phoenix
I made a home made water block last year and used a beckett 325 GPH submersible pump in 5 gallon paint bucket filled with water. I was able to maintain -10 to -15 C W/ 72 watt peltier. I also had an adjustable outlet valve to which i had turned down to restrict the flow for i thought i had too much GPH flow. The above was running p3 700 @ 1022.

-10 to -15C?? WHAT? is that your temp or how much you decreased from your earlier state? Is that a burn in temp?? Damn, I should have gone straight to water cooling and forget about air cooling. That works MUCH better.

[William]

train, those temps are with a peltier which can do that.

[train22]

oh yes, hahah, I was so excited about those temps I didn't bother to read the rest, lol

[Burning Phoenix]

Here are a couple of Mother Board Monitor pics from my old P3 700 chip. These temps as you can see are in Fahrenheit.
this one is approx. -9 degress C. conversion from F.
http://www.phoenixhideout.com/temp1008.jpg
this one is approx. -13 degrees C. conversion from F.
http://www.phoenixhideout.com/temp980.jpg
Both temps were from the same P3 chip and i can't find my pic for it being clocked @1022

[Newbie_Doo]

I am running a Little Giant 80GPH fountain pump (submerged), and I get these temps. I am using a 12 1/2" x 5" x 3/4" transmission cooler radiator with dual 120s drawing through it. Granted, my Celeron doesn't cook like the AMD chips do, but 2c over ambient is pretty good.

[Mord-Sith]

There is a big debate on whether you can have too much gph but the thermodynamics people I have talked to say no. There is a point where it becomes usless but it doesnt hinder. Yes, faster water doesnt pick up as much heat but then it doesnt have as much to loose going through the radiator. Also if water is going twice as fast but picking up half as much it evens out. I dont have any thing right here to prove this of course Im just going by what a mechanical engineer told me.

[Kibler]

Assuming you dont have 1" tubing or something to that extent wouldnt you create a lot of pressure with a really high powered pump?

I hooked up a 1200gph pump just for fun and the noise is just too much, might as well delete all my mp3s as I wouldnt be able to hear them if I kept that thing going!

Was thinking of putting my setup in the closet and just running lines to the pc.....I hate noise!

Kibler

[cjtune]

Originally posted by Mord-Sith
There is a big debate on whether you can have too much gph but the thermodynamics people I have talked to say no. There is a point where it becomes usless but it doesnt hinder. Yes, faster water doesnt pick up as much heat but then it doesnt have as much to loose going through the radiator. Also if water is going twice as fast but picking up half as much it evens out. I dont have any thing right here to prove this of course Im just going by what a mechanical engineer told me.

Yes, there is a point where everything saturates and will not get better -but definitely not for the worse. More flowrate picks up less heat PER volume of fluid but in the end it picks up just as much heat as a super-slow flowing fluid. The difference is that the temperature at the fluid side of a 'block or heatsink will be at a lower temp and this results in overall lower temp for the heat source (CPU). The radiator also has to get rid of that much heat. So if your CPU outputs 100W of waste heat, the water will always pick up 100W and the radiator wil always get rid of 100W. From the pump's aspect, larger gph pumps indirectly mean higher pressures supplied. Higher pressures ensure that the pumps flowrate will not drop too much from flow resistances (which is proportional to the square of fluid speed). But then again, how much are you willing to pay for a larger gph pump for diminishing returns? So the key thing here is just to use a sufficiently-sized pump. Don't ask me -every system is unique and this goes especially for home-made bongs and it also depends on the heat load on the WC rig.

[cjtune]

Originally posted by Kibler
Assuming you dont have 1" tubing or something to that extent wouldnt you create a lot of pressure with a really high powered pump?

I hooked up a 1200gph pump just for fun and the noise is just too much, might as well delete all my mp3s as I wouldnt be able to hear them if I kept that thing going!

Was thinking of putting my setup in the closet and just running lines to the pc.....I hate noise!

Kibler

Yeah, there's also a problem of noise too...

[OddOne]

Originally posted by Burning Phoenix


Hmmm, I'm at -7 deg. C right now (under moderate load) with a P3-700E @ 1035 MHz, with an Eheim 1046 80GPH pump. It's not just about the pump rate, folks, it's about how efficient your ENTIRE system is at moving the heat. Transfer through each cntact surface, from waterblock to water, from water to air through the raidator, all that has a MAJOR say in what your temps are going to be. Just like the fact that there's more to a fast computer than just processor speed.

If you're curious, my system uses a potted 80-watt Peltier fed 65 watts, Eheim 1046 as mentioned, P3-700E FCPGA @ 1035 MHz in a slotket on an Asus P3V4X. Modified Senfu dual-fan radiator (read: I cut those *#%$ reducers off the tube ends) for the other end. Closed-loop, no reservoir.

oO