Are the Cooler Master Silent fans good enough to cool my case?

I bought these fans: http://svc.com/tlf-s12-ew-19.html
Here are the specs: Fan Dimension 120x120x25 mm
LED number 4
Voltage (Volt) 12 VDC
Current (Ampere) 0.15 A±10%
Input Power (Watt) 1.80 W±10%
Speed (R.P.M.) 1220 R.P.M.±10%
Air Flow (CFM) 42.734 CFM
Air Pressure (mmH2O) 1.557 mmH2O
Noise (dB-A) 22 dB-A
Weight 137g
Life (hour) 30,000 hours
Bearing Type Sleeve
Speed Senser Yes


Are these 2 fans too weak to cool my Lian-li v2000? I put the original case fans on my heatercore (that's the plan anyway) and they were rated at I believe around 70cfm. I am watercooling everything, so not sure if I still need the higher cfm fans or not. So, any help is greatl appreciated.

If they're going to be used as case fans then they're adequate. Don't expect low temps, but if they're actually 22dBA then they should be worth the temp increase over the stock case fans.