Massive Power that is Inaudible for us Watercoolers !

[virtualrain]

Hey Virtual Rain,
This entire thread was inspired by you. First off, I got the link to work, I believe. Second, the fan that comes stock with the Toughpower 1200 and 1000 watt models (cant speak about the 850 and 750) is a I believe (I had this in some file or another and cant seem to get to it at the moment) a Yate Loon D14BH-12 that can is controlled by the PCB to output up to 2400 rpm or 120 cfm at 44.5 dBa (in other words, loud). The replacement fan is the D14SM-12 at 62 cfm/1400 rpm/29 dba or at 7 volts it is 42 cfm/~1050 rpm/~19 dBa (much quieter). The traffic is just some folks asking me about the merits of watercooled PSUs (like I am some authority, ha).

I see. That wasn't obvious from your OP.

There is nothing wrong with watercooled PSUs in principle, but <snip> They are not good for noobs, <bla bla bla>

I agree. Water cooling isn't for everyone and water cooling PSU's isn't for everyone either... but as with water cooling anything, it can be done well or poorly. It can be a very effective way to remove some noise from your system with the right selection of components, loop design, etc.

The question about whether you want a pump with more head pressure (like the DDC + 18 watt version) or a pump with more flow (like the MCP 655); or likewise whether it is better to have a high impingement block (like the Storm) with reduced flow or a low impingement block (like the Fuzion) with greater flow or a block that might be somewhere in between, like the Apogee GT, turns out to be surprisingly difficult to give a one sentence answer to. These exact questions that many of you have wrestled with when choosing your blocks or pumps in a slightly different context are the same questions that stumped the ancient Romans when building aquaducts to bring water into Rome. That is because the two critical components in the performance of your water loop, pressure and flow are COUPLED. That is why it is so difficult to have an intrinsic or instinctual feel for what is going on (believe me when I say that this was also argued about fiercely until the matter was finally laid to rest in the early 1800s). Consider for a moment this quandry: If I have a high flow waterblock with almost no pins on it, the water should move across its surface quicker (since there are no pins to block its flow) allowing the water to flow over the block's smooth surface and take more heat away, right? But wait, if the block has very tall copper pins sticking up from the base or a wide area of pins (like the Apogee GTX) they provide much greater surface area for transmitting heat into the passing water, right? But then again, those pins sticking up are blocking the flow of some of the water, right? So, now which block design is the best?

More to come this evening,
Jay

I'll drag this over to your other thread so we aren't off topic here.