No, you want to minimise the overall noise of the system. How fast the air inside is moving is only one factor in that but in our scale of thinking (keeping things quiet) it is the fans that make the noise, not the draft of air. We're not blowing a hurricane here.No1 wrote:What you want is to minimize the linear velocity of the air while maximizing the heat transfer rate.
Have you even thought what purpose the graphics card fans will have in this? Drawing air in from the rest of the system, driving it through a heatsink and expelling it out of the back? That combined with a positive pressure set of case fans can be considered a push pull system. You are very confident of your claims and perhaps you do have general scientific and engineering knowledge but for computer systems there is a lot that is specific so please do consider what we are all saying and bare in mind that we might also have the same scientific/engineering background knowledge that you also have, we just also happen to know stuff about this field in particular.No1 wrote:Push-pull fan configurations have been shown to excel at this, because the decrease in noise output due to the slower-moving fans and air more than compensates for the increase due to having more fans. Using both intake and exhaust fans for the case as a whole amounts to a system-wide push-pull configuration. So you get a net gain in noise performance at any given level of cooling performance.
Take a look at the SPCR review of the FT02:No1 wrote:I would love to get a better understanding of the trade-offs involved. Can you point me to any good sources?
http://www.silentpcreview.com/article1250-page1.html
It was given an editors choice and it was noted that adding a second graphics card made no real difference to temperatures or noise. This is a good sign if you are aiming for 3 graphics cards. Perhaps this system is lower powered but adding on the possible power of additional components I only get to 900W AC even under stress testing so again this confirms that a 1000W PSU would be fine.
Again, be careful with noise measurements. Unless you are going to be testing in exactly the same way as someone else you can not say that something is louder or quieter than something else that you haven't heard yourself. That SPCR system in the FT02 was tested at 30dB at load and might be a bit louder with the components you are talking about putting in it but it is possible it could be a similar range.No1 wrote:Do you think it's possible to get it down much quieter than the 35dbA at idle and 45dbA under load we have arrived at so far in this thread?