O.K. i measured the CPU heatsink fan with a inches measuring tape,it seems to measure 3" an 1/16 i believe a 1/16 first mark after the 3" mark on tape i believe,excuse my math lol,so this one http://www.amazon.co...ref=pd_sim_pc_2
is 3.2 x 1 x 3.2 inches might be better fit then this one http://www.amazon.co...n/dp/B006GD3K5C
which is 3.6 x 1 x 3.6,this one fit well as a case fan,both have same CFM,RPMS i believe.CPU fan is clipped on,not screwed on.So far heat doing well in case,usually no higher then 30c - 40c on CPU also i see most of the times the CPU fan is running at 1748 RPMs,seems be pretty much what runs at no matter how long PC is on,You feel this is enough air flow and RPMs with Noctua only runs at highest 1800 with the Noctua i mentioned NF-R8 PWM FAN with a 34 CFM.I will monitor it,since have software came with PC that does this,so do not have look in BIOS.This i found on internet by trying look up model of fan on CPU,closest i got,same model #,a Delta http://www.cwc-group.../aub0812vh.html
see it ran at 39,000 RPMs,quite noisey high dba's,why at first concern over enough airflow.Question to,know might seem like i should know but when mounting CPU FAN airflow should blow towards the heatsink(down),right?If you feel Noctua NF-R8 PWM is best choice i will try it.So far noise levels beter with new PSU,might of been older one was noisier,also new Noctua case fan is very quiet,great fan.Thank you for answering,just answer last question be much appreciated,then i feel i will be done with this post,ty again.
Edited by jds63, 23 December 2012 - 05:06 PM.