Two short questions on watercooling

[Stefan1024]

To the WC gurus on LTT

1) How much is the temperature difference between the water temperature and the CPU / GPU core temperature under full load?

2) Is it possible to shield the pump with dampening material so it will be dead silent? Can the pump overheat when hermeticly sealed or is it cooled by the water it is pumping?

Thank you.

[HeathCliff]

1) Not much. Because your pump cycles the liquid at a fast rate, the temps wouldn't really rise much.

 

2) Get a PWM D5 pump and stick it down with velcro or something similar. 

[Stefan1024]

1) Not much. Because your pump cycles the liquid at a fast rate, the temps wouldn't really rise much.

2) Get a PWM D5 pump and stick it down with velcro or something similar.

The heat must still go through the IHS and the waterblock. I assume you lose around 5-15℃, but I have no experiabce on WC.

[QBtech]

The heat must still go through the IHS and the waterblock. I assume you lose around 5-15℃, but I have no experiabce on WC.

 

The difference mostly depends on how long the load lasts and whether or not ur rads can deal. It also depends on where you measure the water temps, water going in the the block will be warmer than the water coming out. but the inefficiencies also depends on the core and block in question. Usually water is cooler than the cores

[HeathCliff]

The heat must still go through the IHS and the waterblock. I assume you lose around 5-15℃, but I have no experiabce on WC.

 

To be honest, I have no idea on the precise numbers. If you have a single D5 with multiple rads and blocks, then the temperature in the fluid may rise by 10-15, but in the standard build, I doubt it will go higher than 5 degree. 

[Stefan1024]

The difference mostly depends on how long the load lasts and whether or not ur rads can deal. It also depends on where you measure the water temps, water going in the the block will be warmer than the water coming out. but the inefficiencies also depends on the core and block in question. Usually water is cooler than the cores

Ok lets assume I have a unlimitted supply of 20℃ water to runn through the CPU block.

How hot will the cores be?

[Stefan1024]

To be honest, I have no idea on the precise numbers. If you have a single D5 with multiple rads and blocks, then the temperature in the fluid may rise by 10-15, but in the standard build, I doubt it will go higher than 5 degree.

Well I think we talk about two different things.

At the moment I don't care how to cool the water. But when the water is at temperature x the cpu will have the temperature x + y. I'm interested in y.

Or in other words: What is the max temperature of the CPU in a good custom loop with an overkill of rads?

[QBtech]

Well I think we talk about two different things.

At the moment I don't care how to cool the water. But when the water is at temperature x the cpu will have the temperature x + y. I'm interested in y.

Or in other words: What is the max temperature of the CPU in a good custom loop with an overkill of rads?

 

That all still depends on the block and core. There is only so many heat the water cn absorb at any given time. if you have a massive overclock and overvolt that would result in ur core being 500 degrees on a stock cooler, even the most advanced waterloop will still make the cores reach thermal limits. Thats the reason people go into phase changing and Liquid nitrogen

[BrightCandle]

To the WC gurus on LTT

1) How much is the temperature difference between the water temperature and the CPU / GPU core temperature under full load?

2) Is it possible to shield the pump with dampening material so it will be dead silent? Can the pump overheat when hermeticly sealed or is it cooled by the water it is pumping?

Thank you.

 

1. Depends on how you spec the loop. Typically you will aim for around 10C delta above ambient. Its possible to go lower but requires high speed fans and big radiators or not a lot being cooled.

 

2. You can put the pump onto various foams to dampen the vibration into the case and they then can become very quiet, quieter than a few 800rpm fans or the click of hard drive. The pump is cooled by the water its one of the considerations when choosing the radiators and fans you need as it dumps about 15-25Watts into the water.

[Deli]

D5 pump is cooled by the coolant(water) passing through it. DDC pump is air cooled, might benefit from an additional heatsink.