Duel res do able?

[Dimetime35c]

Okay I'm wondering if your able to run duel res in a system? I'm wanting to do a separate cpu and gpu loop to mainly cut down on extra tubing runs and to keep the heat down from both components. But I'm wondering if need be say one pump fails or just for looks, would I be able to hook both res together in one loop if the pump is strong enough? Or would it cause to many issues having two in one loop? Kinda like the look of a front bay res and a cylindrical one in the inside.

[alexhelvetica]

I don't know what case you have, so I don't know if your case can hold 1 or even 2 reses, but if i can it should be fine!

[W-L]

Okay I'm wondering if your able to run duel res in a system? I'm wanting to do a separate cpu and gpu loop to mainly cut down on extra tubing runs and to keep the heat down from both components. But I'm wondering if need be say one pump fails or just for looks, would I be able to hook both res together in one loop if the pump is strong enough? Or would it cause to many issues having two in one loop? Kinda like the look of a front bay res and a cylindrical one in the inside.

 

Having a separate CPU and GPU loop doesn't make a big difference in performance as long as you have enough rad space, the fluid moves around very rapidly around the loop so the order also doesn't affect temps of each other that much. The only reason really for dual loops is for looks when people have an extremely large case and too much open space.

 

Having two pumps in series or parallel in a loop would give you that extra redundancy if one were to fail without issue.

[Dimetime35c]

Having a separate CPU and GPU loop doesn't make a big difference in performance as long as you have enough rad space, the fluid moves around very rapidly around the loop so the order also doesn't affect temps of each other that much. The only reason really for dual loops is for looks when people have an extremely large case and too much open space.

Having two pumps in series or parallel in a loop would give you that extra redundancy if one were to fail without issue.

I've got a 760t and I just think the look of a front bay res for the cpu and the internal cylindrical rad for the gpu would look super cool

[Enderman]

1) having two loops for performance reasons is a waste of money

if you want two loops, then you should be doing it for looks

 

2) if you are going to have two loops you need a separate pump+res for each loop

 

3) a single D5 pump is enough for any watercooling loop even with two reservoirs

 

4) you should be reading to spend $1k+ for a watercooling system like that

[W-L]

I've got a 760t and I just think the look of a front bay res for the cpu and the internal cylindrical rad for the gpu would look super cool

 

If you have the extra money you can but as said there isn't really a performance gain by dual loops in a system.

[Deli]

Having a separate CPU and GPU loop doesn't make a big difference in performance as long as you have enough rad space, the fluid moves around very rapidly around the loop so the order also doesn't affect temps of each other that much. The only reason really for dual loops is for looks when people have an extremely large case and too much open space.

 

Having two pumps in series or parallel in a loop would give you that extra redundancy if one were to fail without issue.

I have this question in my head for sometime. If the water goes to the GPU first, then to the CPU. High end GPU(s) really pump out a lot of heat, especially if you have more than one. You can feel the warm of the exhaust tubing of the GPU by touching it. Then the hot water from the GPU goes to cool the CPU. Doesn't seem to be a good idea. GPU usually has more head room for cooling than CPU when water cooled.

 

Either the loop starts from going to the CPU first, which generally produces less heat than high end GPU. Or runs two separate loops if there are enough space in the case. Just a thought.

[W-L]

I have this question in my head for sometime. If the water goes to the GPU first, then to the CPU. High end GPU(s) really pump out a lot of heat, especially if you have more than one. You can feel the warm of the exhaust tubing of the GPU by touching it. Then the hot water from the GPU goes to cool the CPU. Doesn't seem to be a good idea. GPU usually has more head room for cooling than CPU when water cooled.

 

Either the loop starts from going to the CPU first, which generally produces less heat than high end GPU. Or runs two separate loops if there are enough space in the case. Just a thought.

 

It would marginally but not in a meaningful way in a PC loop, in thermodynamics if you were to calculate it there would be a slight increase in fluid temps if the loop went from the GPU into the CPU then the rads and pump/res but the fluid still has enough heat capacity to take away heat from the other components down the line.

 

That's also the main reason why loop order doesn't matter other than the res and pump as long as there is enough rad space which is the key. The fluid moves around really fast so it's not increasing in temps by much at all before it gets cooled off by the rads and repeats the process. 

[Deli]

It would marginally but not in a meaningful way in a PC loop, in thermodynamics if you were to calculate it there would be a slight increase in fluid temps if the loop went from the GPU into the CPU then the rads and pump/res but the fluid still has enough heat capacity to take away heat from the other components down the line.

 

That's also the main reason why loop order doesn't matter other than the res and pump as long as there is enough rad space which is the key. The fluid moves around really fast so it's not increasing in temps by much at all before it gets cooled off by the rads and repeats the process. 

Thanks for clearing that up.

[Dimetime35c]

It would marginally but not in a meaningful way in a PC loop, in thermodynamics if you were to calculate it there would be a slight increase in fluid temps if the loop went from the GPU into the CPU then the rads and pump/res but the fluid still has enough heat capacity to take away heat from the other components down the line.

That's also the main reason why loop order doesn't matter other than the res and pump as long as there is enough rad space which is the key. The fluid moves around really fast so it's not increasing in temps by much at all before it gets cooled off by the rads and repeats the process.

How about if we add into the mix 2+ titan Xs running battlefield 4 at ultra high on triple monitor? I can see one card not making a difference but factoring in the highest end card on the market and I don't see how that wouldnt effect the cooling performance. Wouldn't two titan Xs put out almost 100 degrees each making the water in the loop close to 200+ degrees??

[W-L]

How about if we add into the mix 2+ titan Xs running battlefield 4 at ultra high on triple monitor? I can see one card not making a difference but factoring in the highest end card on the market and I don't see how that wouldnt effect the cooling performance. Wouldn't two titan Xs put out almost 100 degrees each making the water in the loop close to 200+ degrees??

 

As said it has to do with the radiator space for the ability to cool the fluid, it would never reach 100C if it did your loop would boil and pop a hose off which is the worst thing that could happen.

 

The fluid in a loop should never pass 60C since it's moves so quickly through the blocks and it actively being cooled by the rads, you may see a small effect on the CPU temps but very marginal as before.

[Deli]

How about if we add into the mix 2+ titan Xs running battlefield 4 at ultra high on triple monitor? I can see one card not making a difference but factoring in the highest end card on the market and I don't see how that wouldnt effect the cooling performance. Wouldn't two titan Xs put out almost 100 degrees each making the water in the loop close to 200+ degrees??

More accurate to describe the heat output in watt instead of *C degree. Yes, high end GPU can produce a lot of heat(watt). But water has a very high heat capacity. It can adsorb a lot of heat without rising a lot in temperature. My old system has a 4790K and GTX 780(same TDP as Titan X), both overclocked. The highest I've seen the water temperature in the loop was like 40*C before it got cooled by the rads, when both CPU and GPU are under stress test.

[Dimetime35c]

As said it has to do with the radiator space for the ability to cool the fluid, it would never reach 100C if it did your loop would boil and pop a hose off which is the worst thing that could happen.

The fluid in a loop should never pass 60C since it's moves so quickly through the blocks and it actively being cooled by the rads, you may see a small effect on the CPU temps but very marginal as before.

I still am confused as to how it would only be a small margin of increase. With high end cards running a very demanding task wouldn't the heat given off by multiple cards effect the water temp and ability to cool the cpu? Yes the water isn't staying and being heated like in a pot. But wouldn't it be heated by the first card, then heated more by any card after that. Then go from the gpu into the cpu carrying what ever heat it's picked up off the gpus, the having to pick up the heat from the cpu on top of what it already got. From the other cards before. So like say both cards add 20c of heat each so 40c is going out to the cpu. So on top of whatever heat the cpu already has its receiving 40c worth in heat from the water? Sorry if it sounds like I'm arguing with you I'm just interested and was never good at science. Just trying to explain my train of though.

[W-L]

I still am confused as to how it would only be a small margin of increase. With high end cards running a very demanding task wouldn't the heat given off by multiple cards effect the water temp and ability to cool the cpu? Yes the water isn't staying and being heated like in a pot. But wouldn't it be heated by the first card, then heated more by any card after that. Then go from the gpu into the cpu carrying what ever heat it's picked up off the gpus, the having to pick up the heat from the cpu on top of what it already got. From the other cards before. So like say both cards add 20c of heat each so 40c is going out to the cpu. So on top of whatever heat the cpu already has its receiving 40c worth in heat from the water? Sorry if it sounds like I'm arguing with you I'm just interested and was never good at science. Just trying to explain my train of though.

 

Both cards would not add 20C of heat maybe a 5C at most the fluid stay in the block less than a second it has to do as said with the speed of how everything flows through the loop. When the loop warms up and reaches optimum temp it will pickup a little bit of heat from the cards and CPU and immediately dissipate it to the rads, the reason why order doesn't really matter is water's high heat capacity. It's like what Deli said where water can absorb a fairly large amount of heat without a major change in temperature.

 

If you were to calculate though there is a decrease in cooling for the CPU if it went through the GPU's but it's still not much in a real world results.

[OddsCrazyStuff]

Dual loop is for looks and easy upgrades/maintenance.

Unless you run ether CPU or GPU(s) at max for hours at time, then it can be good to separate them, since that will increase the lifespan of the parts not in use (at least in teori).