Watercooling Loop question

[Power_VANO]

Hello guys,

I got a little question about my watercooling loop. I am thinking is it worth placing the pump right before the CPU Block?

I got these components:

CPU Block: Swiftech Apogee GTZ
Pump: Laing D5 (Swiftech MCP655 branded)
Reservoir: Swiftech MCRES Micro Rev.2
Radiator: Airplex XT 240

I got 2 ideas about loop management:

1) Res >> Pump >> Rad >> CPU Block

2) Res >> Pump >> CPU Block >> Rad

D5 puts ~15-24 watts of heat in loop. So here is my question: which loop will give me better results? Is it worth it to place Rad after the pump to dissipate that heat?
Or will the second loop give me better results, cause my CPU Block is impingement design and will receive benefits from more flow rate and pressure?

As far as I concluded, D5 will increase water temps by <0.5-1 C.
If so, then I think that placing the D5 just before GTZ will give me the better results.

What do you think?

P.S. I have not received the rad itself yet to test the loops myself.

[Grinch]

which ever yields shortest loop....wins

[PsYcHoNo0b727]

which ever yields shortest loop....wins

+1.

Less tubing = Better Loop. Temperatures of liquid are uniform through the entire loop.

[OverDozeD]

I found it useful for my future WC thx VANO

[Power_VANO]

Thanks guys for your replies. So you think there will be no bennefit placing the D5 before the GTZ (Starting flow and pressure will be bigger)?

As of tubing, I think there wont be much difference, maybe ~about 10-15 cm...

[=[PULSAR]=]

But you must also think that a pump does dump a little bit of heat into the loop.

[Power_VANO]

OverDozeD
Good that this helped you I am drilling hard into WC details, loops, etc...

[OverDozeD]

OverDozeD
Good that this helped you I am drilling hard into WC details, loops, etc...

...... till your mobo is on it's way home, same as mine

[Webby]

Couple of points,

1. Flow is constant through the whole loop
2. Pressure is not it drops as the loop progresses Impingement CPU blocks can benefit from higher pressure (Neakuh noted that placing the pump directly before the Koolance 350 improves performance slightly).
3. Water Temps are not constant all around the loop they will increase passing through every block how much they increase by is dependent on what the block is cooling, which block is used and the flowrate of the coolant. In a "Highflow" system ~1.5gpm (as opposed to a low flow system <1gpm) with a heatdump of 300W you would expect to have a water delta of 0.76°C over the loop (using pure water, additives and pre-mixed coolants will increase this number some what, if you were using pure ethylene glycol for example then it would rise 1.32°C).

So conclusions to be drawn from that pump -> block is probably not a bad idea if impingement is your thing which with a GTZ it is. The pump (assuming its a D5/DDC 3.2) will not be adding much heat to the loop certainly not enough to make sure you go to a rad first. But as others have said shortest loop makes the most sense so have a play around with a few setups to see what you can do.

[Power_VANO]

Webby
Thank you webby for your informative post

I'll do some more math.