which pump?

[spinky]

okay.. the last time around i got a shitty pump with shitty head so i junked it out of the window.

then, i got a pump that is too big and too powerful so it went to my friend who's going to use it for a dual bong system (which will never be complete due to his laziness, dont tell him that)

so now.. i'm gonna pickup a new board and cpu, and i want to run my watercooling system again.. i got all the stuff.. EXCEPT a pump..hopefully there is a soul here that uses the same setup for me

pump choices : Eheim 1250 or Eheim 1048

Waterblock : DD Maze 3 Block
Radiator : Black ICE Pro Evo
1/2" all round.

Casing, most probably Lian Li mid tower - in case you need to calculate head.

So, which pump is suitable for me, considering my setup is so common and generic i hope you pros here have some answer for me.

i roughly figured out that if the flow is higher, means less time in the rad, thus higher water temps? and if flow is low, means more time in rad, lower water temps but the water moving away from the block is slow too?

and another question..where should i put the pump? bottom of the case? i heard a friend say the pump should be at the lowest point of the loop or something

[theetruscan]

i roughly figured out that if the flow is higher, means less time in the rad, thus higher water temps? and if flow is low, means more time in rad, lower water temps but the water moving away from the block is slow too?

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I'm not clear on exactly what you are saying here. But, simply, higher flow means lower temps within reason. Barring a pump that puts huge amounts of heat into the water.

If you can put the 1250 in your case it should give better temps with most blocks. At least as significant;y, you will see better performance when/if you add other blocks.

[8-Ball]

Originally posted by theetruscan
i roughly figured out that if the flow is higher, means less time in the rad, thus higher water temps? and if flow is low, means more time in rad, lower water temps but the water moving away from the block is slow too?

Wrong, wrong, wrong!

With lower flow, the water will pick up more heat at the waterblock and dump more heat at the radiator, but you will have less flow.

= each packet of water carries more heat, BUT LESS PACKETS PER MINUTE!!!!!!

People need to stop thinking about waterflow concerning each individual piece of water.

The average water temperature is governed largely by three things.

1. The heat load (from blocks, pumps and maybe friction)
2. The ambient air temperature
3. The efficiency of the radiator (C/W)

Note that flow is not a part of this. However, changing the flow rate does affect 1 and 3 to a lesser or greater degree.

Increasing the flow will increase the heat load slightly, due to more power dissipation in the pump and slightly increased friction.

However, increasing the flow will also breakdown the barrier layer of slow/stationary water at the interface between coolant and metal in the radiator. This iwll increase the efficiency of the radiator (lower C/W). A lower C/W means that for the same heatload, the temp difference required between the water and the air is lower.

The art is balancing 1 and 3 against one another. The point of diminishing returns is where increasing the flow requires such a large pump that 1 is increased to an extent greater than the improvement in efficiency.

DOES THIS MAKE SENSE?

If so, make sure you tell as many people as possible when you see them having the same discussion/argument.

8-ball

[theetruscan]

However, increasing the flow will also breakdown the barrier layer of slow/stationary water at the interface between coolant and metal in the radiator. This iwll increase the efficiency of the radiator (lower C/W). A lower C/W means that for the same heatload, the temp difference required between the water and the air is lower.

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and in the waterblock.

[spinky]

makes sense. so anybody tried it out, and which pump *should* i get?

the 1048 or the 1250

dont tell me nobody here uses the dd maze and a Black Ice Pro.
maybe in the near future a chipset OR gpu block too, but not anytime soon.

[Sproket]

Im going to use the 1048 for two reason's.

1. It almost silent compared to 1250.

Im only cooling CPU so 1048 is more than enough with one Rad from D-Tek.

My NB is cooled by a Vantec All Copper Chipset fan kit. Works like a charm. I cant justify cooling NB with water, for one it would heat the water up to much and not give me any more stability than what Im getting w/ Vantec cooler.

2. I think water moving slower for "mild" water cooling is better and that the 1250 is overkill. Dont get me wrong I do overclock. Right now Im running a 2100+ AMD @ 2100 Mhz, 10.5x200 FSB on Air. With water I will be able to push my system to what I know it will handle. My new little super computer.

I going with this setup.
White Water 1/2 " w/ Tygon
1048 pump
Dtek Rad w/ shroud(Maybe 2) and Panaflo L1A 120mm fans (Reostat)
Mod the case in front and possibly top.
Use a T connection at high point no Res.

Thats my starting system. Will adjust Fans, etc to get what I want. The Dorm room Frig is always in the back of my mind.

[spinky]

more feedback please?