Airflow problems Zalman Z11 Plus case: Replace fans?

Hi, I recently built a new PC build (shown below) and decided to go with the Zalman Z11 Plus as it was going for a very good price.

I have noticed that the fans included with the case (5: 1 front, 1 back, 2 sides and 1 top) are not venting/transporting air as much as I'd want (except the rear exhaust one) and I'm noticing temperatures I'd rather like to reduce.

The fans are controlled via mobo software included and even at 100% are not doing much. All my components are red/black now, so I would want to replace the stock blue LED fans in anycase with red LED fans and include additional 2 fans top and bottom.

Any pointers would be appreciated.

Regards, Snuif

My build:

CPU: intel i5 4670K (3.4 Ghz)
CPU Cooler: stock
MOBO: msi Z87-GD65 Gaming
Ram: Corsair Vengeance LP red 8GB (2x4GB) (1866 Mhz)
GPU: msi Geforce GTX 760 TF OC 4GB
PSU: Antec HCG-850M
HDD1 (OS): Samsung 840 evo 120GB SSD
HDD2: WD 1TB Caviar Black 7200rpm (64mb)
OS: Win 7 Professional (64 bit)
CHASSIS: Zalman Z11 plus
4 answers Last reply
More about airflow problems zalman z11 case replace fans
  1. What are your cpu temps?
    The fans are likely to be poor quality with a budget case, even so they are delivering air so it is possible that it is another problem, perhaps the airflow is obstructed by cables? Or its just because haswell runs hot on a stock cooler, either way you wanna get an aftermarket cpu cooler for the 4670k.
  2. Yes the Haswell does run quite hotter, 35 degC idle, up to 60+ degC during gaming (CoD Ghosts for eg.) with the stock cooler. I will be getting an aftermarket cpu cooler (not watercooling though) in the next month or so, so I bet that will help already.

    Cable management is decent, so I don't think it could be that. It is most likely the included top and front fans as they barely do anything but spin. As mentioned, the rear exhaust fan works reasonably good.

    So would it be worthwhile to replace the fans with more decent fans? I'm not really worried about louder fans, since my UPS fans tend to run loudish. I'm also using gaming headphones so I wouldn't really notice the sound in anycase.

    Fans I'm considering are:

    Corsair: or
  3. I personally use Aerocool Sharks as they deliver 83 CFM at 25 dba + the LEDs are really good.
  4. Before getting new fans try connecting them to the PSU with 3-to-4-pin adapter, which you can get for $5 in any info store. Check out my tutorial on that:
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