Just installed fans dont seem to push enough air

[mltno]

I am using this 120mm fan uptop http://www.frys.com/product/5707972?site=sr:SEARCH:MAIN_RSLT_PG which has 30 less CFM but it seems to push twice as much air then these 120mm fans i just installed http://www.newegg.com/Product/Product.aspx?Item=N82E16835200048&cm_re=rosewill_120mm-_-35-200-048-_-Product. The way i installed the new fans is just with 4 pin connectors i had open. Im running a MSI 890GXM G65 MB which has a Coller master 212 plus installed. When i open up speedfan i can only see fan1 with a speed. Am i doing something wrong or is there a way to up speed...?

 

[henydiah]

In mobo have 3 socket for fan, 1 for cpu and 2 for sys sytem . software speed fan cannot increase speed fan cpu because locked from bios , you can check in bios . For increase maximum cpu fan disabled smart fan.
from fan sys can increase speed use software .

 

[davcon]

Wow lol! pretty lofty claim of 74.48 CFM and 29.28 dBA
from a $5 fan.
You get what you pay for fella!

 

[orangegator]

If you want it to run at full speed, use the molex adapter that came with it and plug it directly to a molex plug of the psu. It will push a lot more air, but also be much louder.

 

[JackNaylorPE]

Advice is a bit late, but I wouldn't ever buy anything with the Rosewill name on it.

Also, labels get written by marketing types who seem to have no qualms about stretching the truth .... (read lying). A fan is simply an air pump and a rating of say 75 cfm means nothjng. What ya need to judge with is:

75 cfm @ 0.000" pressure
50 cfm @ 0.100"
25 cfm @ 0.200"

The reality is that all fans installed in a case will experience back pressure. So a fan which they rated at 75 cfm (@ 0.000 backpressure) may have a very low performance at the backpressure which it is experiencing.

See this:

http://www.silentpcreview.com/article63-page1.html

Here's some reasonable choices

http://www.newegg.com/Product/Product.aspx?Item=N82E16835214001
http://www.frozencpu.com/products/10323/fan-674/Scythe_Gentle_Typhoon_120mm_x_25mm_Fan_-_1850_RPM_D1225C12B5AP-15.html?tl=g36c15s60
http://www.frozencpu.com/products/10174/fan-653/Scythe_Kama_Flow_2_120mm_x_25mm_Fan_-_1900_RPM_w_Extra_Fluid_Dynamic_Bearing_SP1225FDB12H.html?tl=g36c15s60
http://www.frozencpu.com/products/7526/fan-441/Scythe_S-FLEX_SFF21G_120_x_120_x_25mm_Fan_w_S-FDB_Bearing.html?tl=g36c15s60