I don't know what kind of power set up you have, but those are 24 volt fans. You'd have a fairly significant undervolt to run them at 12V. At 24V they supposedly put out 88cfm so you'd have to decide whether their undervolted output is enough for your rad. It might be, but since you already have fans and are only upgrading to see if you can increase performance I don't know if it's worth the risk.