What do you think of this Accelero Hybrid? I'm thinking in giving it a try. Not a cheap toy (~120€)!

The screw heads on the bottom of the waterblock suggest to me that there is a gasket between the bottom of the waterblock and the top. That gasket (if there actually is one) is guaranteed to leak at some point in the future. Guaranteed! It might even need to be replaced. Will there be replacement parts available when you need one? Are you willing to make a new gasket if you cannot buy one?

The only good way to make a 2 piece waterblock is to weld the 2 pieces together prior to machining the contact surface. If you buy anything else you're buying a guaranteed failure.

The numbers are impressive but read the fine print.... the tests were conducted in 24 C ambient. Can you maintain 24 C ambient? If not then the pump and/or fans will have to run faster which means they will be louder. Obviously I can't say whether they'll be too loud for you or not but it's something to think about.

With water cooling you always have the option of extending the hoses and putting the radiator plus the fan outdoors.
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BOINC <<--- credit whores, pedants, alien hunters

That gasket (if there actually is one) is guaranteed to leak at some point in the future. Guaranteed!

With water cooling you always have the option of extending the hoses and putting the radiator plus the fan outdoors.

That gasket (if there actually is one) is guaranteed to leak at some point in the future. Guaranteed!

I don't understand you. You have a closer look at 8:55. But the pump is inside there! http://www.youtube.com/watch?v=5SGTg9YIGvo

With water cooling you always have the option of extending the hoses and putting the radiator plus the fan outdoors.

I don't think you can with this cooler, seeing the way the hoses are hooked and that the pump is included in the cooler. This is the main feature of this desing is all one packet.

True about 24ºC ambient, but this is Spain!! Here gets REALLY hot in summer, little can be done there.
but as skgiven said, the advantage is that it blows hot air outside

Thanks very much for your explanation, really interesting thoughts!!

You can cut the hoses and add more hose to make them longer.

Higher ambient means louder fan and pump.

I find quite difficult to know how unpleasant/noisy are 35 dB vs 36 dB or 40 dB. The scale is logaritmic, but I don't know how much logaritmic are my ears :P

Another thing I don't like about their system is that the radiator is aluminum and the cold plate is copper. That will create a Galvanic reaction which will corrode either the cold plate or the radiator and create a leak.

For that reason alone I would not install their cooler in my computer even if they gave me one for free. If they gave me a free cooler and a free computer to put the cooler into I would sell the cooler to my enemy (not a friend) and keep the computer.

Thanks very much for your explanation, really interesting thoughts!!

You can cut the hoses and add more hose to make them longer.

I wouldn't do this, as the design is so compact I don't think it is designed to extend the resistance of a longuer hose.

Higher ambient means louder fan and pump.

dB specs are at Full Load.

Anyway I found somebody that is lending me a sound meter. I find quite difficult to know how unpleasant/noisy are 35 dB vs 36 dB or 40 dB. The scale is logaritmic, but I don't know how much logaritmic are my ears :P

The main drawback of water cooling is that the water pump is hidden, so you won't see its status. You'll know that it stopped only when it's too late - it fried your GPU. In this design the water also hidden (the hoses are black), the tank (reservoir) is probably small and integrated into the radiator - so you won't see the level of the coolant. This is a very dangerous design for 24/7 crunching.

Another thing I don't like about their system is that the radiator is aluminum and the cold plate is copper. That will create a Galvanic reaction which will corrode either the cold plate or the radiator and create a leak.

For that reason alone I would not install their cooler in my computer even if they gave me one for free. If they gave me a free cooler and a free computer to put the cooler into I would sell the cooler to my enemy (not a friend) and keep the computer.

Personally I am using for my CPU from over two years ago with no problems and great performance.

I have an Alienware with a liquid cooler on the CPU and that ran fine. The noise is normal to a fan cooler as the radiator has a fan and that one is mounted at the back of the case. Other computers have a 120 or 140 mm fan there to blow out air from the entire case. The Alienware is missing that.

Pump has indeed a gasket (O-ring) but fits nice in a chamber so leaking is not very likely and the vibration of the pump is minimal.
However at full load (i7 960) temperature goes to 68-70°. My air cooled systems are running 55-64°C. But that are other CPU's. And depends on which program you use to monitor.

Anyhow after three year the temperatures went to 75-80°C. So an indication that there is something wrong with the cooler. It is a close system so nothing to do about it for me. Even replacing the liquid or cleaning the pump is not possible or it must be dismantled completely. I can do that but I don't know if I can replace it properly. So I bought a new one, an all-in-one with, pump, radiator and fan. Temperature now (ambient 25°) at 58-62°.

I am not a big fan of liquid cooling but they are small the pumps to fits easily and there is then room to put a special fan on the memory. These don't fit with the air coolers I have, especially the Zalman CNPX12X needs a lot of space. I even needed to make the bracket that holds the cooler shorter to fit.
But temperature is around 56°.

In the future it could be that I would buy another liquid cooler. It would work on GPU's as well. But I don't know if there is space enough to fit then two or even three GPU's with this type of cooler. The hoses are a bit stiff to bend easily as well.
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Greetings from TJ

Instead of bending the hoses you should use elbows which are metal fittings that have 90 degree or 45 degree angle. When you bend a hose it pinches shut and restricts the flow.

There is nothing magic about closed systems. You can open them, repair them, refill the fluid and close them up again as long as you bleed all the air out of it. Or you can just convert it to an open system with a reservoir which makes it easy to remove all the air.

O-ring seals are easy to replace. O-rings and bearings are so vital to industry that they have been standardized around the world and mass produced to keep costs low and availability high. You could buy a replacement for that O-ring at many automotive parts stores and any industrial parts supply store. They can measure it precisely for you and give you a replacement guaranteed to fit properly. Then all you have to do is clean the mating surfaces well with scotchbrite (a very fine, light abrasive pad), rub a wee bit of petroleum jelly on it, put the O-ring in place and re-assemble.

The problem gaskets are the flat gaskets. They are not standardized and if the manufacturer cannot supply a replacement then you have to make your own. That's not difficult but if you make it too big and a piece breaks off inside the system it can jam a small pump or block small diameter hose like what is used in PC cooling.

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BOINC <<--- credit whores, pedants, alien hunters