crezno

JerkMan

So you have pump-rad, then split the line and have it to into gpu1 AND CPU? That's very interesting. Do you find that helps with temps/pressure?

The MCP655 has incredible flow and pressure.  The longer the loop is continuous the more pressure there is.  I found that it has high enough flow to actually split 4 times and still have the same flow.  I used to run my loops in 1 continuous loop and the pressure was high enough that it broke my pumps after a few months.  When i split them like this, my pump hasnt broke yet, and the temps are better as they are all getting fresh cool water rather than slightly heated water from something earlier in the loop.

crezno

JerkMan

So you have pump-rad, then split the line and have it to into gpu1 AND CPU? That's very interesting. Do you find that helps with temps/pressure?

The MCP655 has incredible flow and pressure.  The longer the loop is continuous the more pressure there is.  I found that it has high enough flow to actually split 4 times and still have the same flow.  I used to run my loops in 1 continuous loop and the pressure was high enough that it broke my pumps after a few months.  When i split them like this, my pump hasnt broke yet, and the temps are better as they are all getting fresh cool water rather than slightly heated water from something earlier in the loop.

crezno

gtxjackbauer

crezno

JerkMan

So you have pump-rad, then split the line and have it to into gpu1 AND CPU? That's very interesting. Do you find that helps with temps/pressure?

I used to run my loops in 1 continuous loop and the pressure was high enough that it broke my pumps after a few months.  When i split them like this, my pump hasnt broke yet, and the temps are better as they are all getting fresh cool water rather than slightly heated water from something earlier in the loop.

You sir are completely wrong.

For you pumps to break in general, you obviously were doing something wrong.  Could've been debris in your loop to running the pumps dry.  Too many variables to say but it's very rare for multiple pumps in your loop to be defective.

Splitting loops does have a negative effect in flow.

Water reaches a equilibrium in the loop so no one actually gets "fresh cool water".

That colored liquid effects your cooling and stains the hell out of your parts.  Most likely build up too.  Hope you do tear downs every 2-3 months or it will be catastrophic.

First of all, if you have a gripe, please send it in a PM or in a watercooling thread. I posted pics because it was requested.

Second of all, my setup is not typical. I have a 600Watt TEC unit in the loop as well directly after the radiator. So yes, splitting the loop up will give all parts the same cool water vs heated water. You are not an extreme overclocking if you believe the loop reaches an equilibrium. The water is heated some how yes? the 780 Classifieds at 1.5v 1500+ MHz are pulling near 450Watts, thats alot of heat. The longer the loop = more pressure required to create same flow. Splitting the loop allows less pressure and high flow. WC is all about flow, not pressure.

And FYI, i have been running this fluid for 2 years, and it has yet to stain any of my parts. Please keep your opinions to yourself if you are going to be rude.

1. The liquid temp will almost always be within 1-2*C from the time it enters your cooling device (radiator, TEC, etc.) to the time it exits. If there is a huge temp discrepancy, that means there is a problem with the loop. You can take my word for it, research it yourself, or even test it yourself, but there will be very little difference between water temps before/after a rad, before/after a hot component, etc.
2. I don't understand... do you think splitting the loop is increasing your flow?
3. Is that Mayhems Aurora coolant? If so it is infact not meant to be run in a system for a long period of time. If it's not aurora, then it's something that has very similar characteristics and I would think would be the same case.
4. What is your TEC doing in the loop exactly? Are you cooling the loop with it or are you cooling something else with it? (not sure what you'd be cooling with a 600 watt pelt though)
5. I give you props for the uniqueness of the setup :D

crezno

Every time you change the direction of the flow, there is an increase in pressure. A Pump is only going to create so much pressure. Its just like a pressure valve on your house, it will only allow so much water pressure through no matter how much pressure is coming in. By creating longer and longer series, you increase the pressure a little at each turn in the flow of the water, etc.  By splitting it, the water has more option to choose a path of least resistance. In turn, it will increase the flow. now if you are just running 1 card and 1 cpu, probably not that big of a deal. If you are running quad sli and a cpu, it will start to become more noticable. There is a difference in running your pump at half speed when splitting a loop to running at full speed and creating a long series, the flow may be similar in the end.  The effects of this can become minimal with the use of high flow parts, but the fact is still there. In a series, the temps of my cards would differ around 4-5C. In parrallel, they are all the same. No matter how fast i got the flow in a series.

My TEC unit is there for 2 purposes. One its immediately after the radiator which cools the water, then immediatle gets split to each of my components. They get TEC Cooler water. My temps on the parts are in the low teens. The water is still cool at this point, and it hits the rad, which does warm the water up a bit, but causes teh fans on the rad to blow cool air at my motherboard which in turn cools the components there, and whatever energy is left is cooling my room. All the hot air is expelled off the hot end of the TEC unit which is vented to my 2nd radiator which is outside my house in a shaded compartment. Trust me, this does work, and is working.

Everyone has their opinions and experiences.

Andrew_K

crezno

gtxjackbauer

crezno

JerkMan

So you have pump-rad, then split the line and have it to into gpu1 AND CPU? That's very interesting. Do you find that helps with temps/pressure?

I used to run my loops in 1 continuous loop and the pressure was high enough that it broke my pumps after a few months.  When i split them like this, my pump hasnt broke yet, and the temps are better as they are all getting fresh cool water rather than slightly heated water from something earlier in the loop.

You sir are completely wrong.

For you pumps to break in general, you obviously were doing something wrong.  Could've been debris in your loop to running the pumps dry.  Too many variables to say but it's very rare for multiple pumps in your loop to be defective.

Splitting loops does have a negative effect in flow.

Water reaches a equilibrium in the loop so no one actually gets "fresh cool water".

That colored liquid effects your cooling and stains the hell out of your parts.  Most likely build up too.  Hope you do tear downs every 2-3 months or it will be catastrophic.

First of all, if you have a gripe, please send it in a PM or in a watercooling thread. I posted pics because it was requested.

Second of all, my setup is not typical. I have a 600Watt TEC unit in the loop as well directly after the radiator. So yes, splitting the loop up will give all parts the same cool water vs heated water. You are not an extreme overclocking if you believe the loop reaches an equilibrium. The water is heated some how yes? the 780 Classifieds at 1.5v 1500+ MHz are pulling near 450Watts, thats alot of heat. The longer the loop = more pressure required to create same flow. Splitting the loop allows less pressure and high flow. WC is all about flow, not pressure.

And FYI, i have been running this fluid for 2 years, and it has yet to stain any of my parts. Please keep your opinions to yourself if you are going to be rude.

Let's play nice here. I don't think he had a "gripe," but was just commenting on what was said. Nothing wrong with that. 

1. The liquid temp will almost always be within 1-2*C from the time it enters your cooling device (radiator, TEC, etc.) to the time it exits. If there is a huge temp discrepancy, that means there is a problem with the loop. You can take my word for it, research it yourself, or even test it yourself, but there will be very little difference between water temps before/after a rad, before/after a hot component, etc.
2. I don't understand... do you think splitting the loop is increasing your flow?
3. Is that Mayhems Aurora coolant? If so it is infact not meant to be run in a system for a long period of time. If it's not aurora, then it's something that has very similar characteristics and I would think would be the same case.
4. What is your TEC doing in the loop exactly? Are you cooling the loop with it or are you cooling something else with it? (not sure what you'd be cooling with a 600 watt pelt though)
5. I give you props for the uniqueness of the setup :D

Andrew_K

crezno

Every time you change the direction of the flow, there is an increase in pressure. A Pump is only going to create so much pressure. Its just like a pressure valve on your house, it will only allow so much water pressure through no matter how much pressure is coming in. By creating longer and longer series, you increase the pressure a little at each turn in the flow of the water, etc.  By splitting it, the water has more option to choose a path of least resistance. In turn, it will increase the flow. now if you are just running 1 card and 1 cpu, probably not that big of a deal. If you are running quad sli and a cpu, it will start to become more noticable. There is a difference in running your pump at half speed when splitting a loop to running at full speed and creating a long series, the flow may be similar in the end.  The effects of this can become minimal with the use of high flow parts, but the fact is still there. In a series, the temps of my cards would differ around 4-5C. In parrallel, they are all the same. No matter how fast i got the flow in a series.

My TEC unit is there for 2 purposes. One its immediately after the radiator which cools the water, then immediatle gets split to each of my components. They get TEC Cooler water. My temps on the parts are in the low teens. The water is still cool at this point, and it hits the rad, which does warm the water up a bit, but causes teh fans on the rad to blow cool air at my motherboard which in turn cools the components there, and whatever energy is left is cooling my room. All the hot air is expelled off the hot end of the TEC unit which is vented to my 2nd radiator which is outside my house in a shaded compartment. Trust me, this does work, and is working.

Everyone has their opinions and experiences.

This is wrong, actually. And generally science and opinions don't go together very well. More changes in direction of a loop (bends, elbows, etc.) cause pressure drop. Not increased pressure. And splitting a loop doesn't simply increase your flow. [a source I will cite for one example - martinsliquidlabs - http://martinsliquidlab.f...s.jpg?w=614&h=1104]

crezno

JerkMan

I think I'm just going to stick with a 360 30FPI rad and a MCP655 to power my sli and CPU and go from there. Thinking serial res>pump>CPU>GPU1>GPU2>rad.

Id see no issue with that. Although, only advice id have to people, is if you plan to pass 1.3v with evbot software whatever you choose, (assuming you use the backplate) watch the temps of the backplate.  I have seen some stability issues arise when it really starts to heat up. put some passive heatsinks back there and it cleared that up.

Usually i am not a believer of a backplate lowering temps, but these ones somehow seem to pick up heat, more than past cards. Im thinking the backs of these cards just put alot of heat off. Wasnt 100% sure if the pads were thermal pads or just insulation for the backplate. Could have been the same thermal pads they used on the reinforcement plate.

crezno

Most of them are elpida now. With the waterblocks i have gotten mine to +700Mhz. Not sure what the samsungs are hitting, I hear its more.

coolhand41

crezno

Most of them are elpida now. With the waterblocks i have gotten mine to +700Mhz. Not sure what the samsungs are hitting, I hear its more.

+700 offset  Game/bench  stable ?

Cial00

Crezno are you hitting 1397 on stock LN2 bios and voltage?