Upgrading System fans

I have a CM690 case and have 4 LED on/off Coolermaster fans


and 2 black fans that came with the case,

i am looking to upgrade to AC Ryan Blackfire4's


because of the higher CFM, so i thought that i would just replace my LED on/off Coolermaster fans. but would the increased CFM interfere with the two stock coolermaster fans that have a lower CFM?

Thanks in advance, rob
5 answers Last reply
More about upgrading system fans
  1. There are two chains of thought. Higher airflow into the case or higher airflow out of the case... both have plus and minus points (positive & negative pressure) but to be honest as long as the case maintains a decent and unobstructed airflow through the case it waont make a huge difference.
  2. Brilliant cheers, well i was thinking...

    i might get these xigmatek ones


    because of the higher air flow compared to my coolermaster, although it is a littler lower compared to the AC ryan fans and plus they are more quiet! bonus!

    I think i might just replace them all...

    Thanks for the response though,

  3. I took a look at the AC Ryan fan specifications. At 2000 rpm they are going to be making quite a bit of noise. The sweet spot for case fans is 1200 rpm. I would not go above 1600 rpm.

    Here is a link to a very good web site with a lot of useful information about quiet pc fans:

  4. thats why i thought of these xigmatek fans but now i am confused because all the fans say how many watts they use, however i cant find how many watts the xigmatek fan takes???


    i want to put them in my scythe fan controller and if i opt to replace them all, 2 in the mobo

    Thanks again for the handy website

  5. Don't worry about the fan wattage. They don't use much power. I doubt if all four fans together use more than 1 amp at 12 volts.
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