system order..... and fan rad size cfm...
 

hi i'm looking for whats the best way to run my dangerden kit....... is it better to go pump>cpu> radiator or pump>radiator> cpu

my setup is in a inwin 500 case cooling cube sits on the psu and has air blowing from the inside to the out... 69cfm fan...

the pump is eheim 1250 (waiting on it) and will do the reservoir mod from overclockers.com ...... currently using mag drive 140 gph is very bad 53c full load at 1556 1.85v a7v133 mobo.......

I found its always best to have the radiator just before the CPU (so the pump doesn't heat the cooled water)
ie. Res > Pump > Rad > CPU > Res or Pump > Rad > CPU > Pump withouth the res.
Try a bigger fan also.. from what some are saying the pump shouldn't make that much difference (but this is also the topic of my debate, and I'm starting tho think towards the 350gph area as well)!

Let me preface this by saying that I have no clue if this is right, and I have had no experience with watercooling other than reading what others have said (yet)...

If the prevailing theory is you want to have a huge difference in temp (most efficient heat transfer), you want the water to move quickly through the waterblock and slowly through the radiator. If you put the radiator before the waterblock, won't water flow through the radiator faster than the waterblock? If you put the radiator after the waterblock, the resulting drop in flow from the waterblock should keep the water in the radiator longer, right? Anyone have data to back this up or shoot it down?

Thanks!

Because a watercooling system is a closed loop, the water flows at the same rate throught the system.

The only change is velocity due to size, although the flow stays constant, we can slow the velocity by using a larger path. So in effect the waterblock does have a faster velocity than something like a Big Momma with it's large and many flow paths. The placement in the system won't make a difference.