alphakry
Limp Gawd
- Joined
- Jul 21, 2005
- Messages
- 470
Cathar said:The other thing to be wary of is that with fans they can be somewhat like pumps. Possible for a fan maker to maker a very high cfm/ low noise level fan, but be totally piss-weak the moment it has to push against any form of back-resistance (ie. through a radiator). My experience with the TT thunderblade fans was like this. In open air-flow mode they worked well but the moment I stuck them on a radiator, performance was no better than fans with even 2/3's of the same rated free-air flow rating.
Sticking my hand in front of them, and I could've sworn that the TT thunderblade fans would kick butt, but when push came to shove, they were all show and no go for a radiator application.
The trick again is to know the actual PQ (pressure-flow) curve of the fans. Like the little MCP600 vs the Eheim 1250 water-pumps. The MCP600 has 1/2 the peak flow rating of the Eheim 1250, but as soon as you stick them in anything but extremely low resistance applications, the MCP600 holds its own very well, and even surpasses the Eheim 1250 for moderate resistances and higher.
So again, going by peak air-flow rating can also be a false carrot. Unless the fan is just blowing air into an open room, pressure counts for a lot. A LOT.
based on those facts, which are very valid points btw - which do you think are the best dba vs cfm 120mm's to slap on a radiator? i think you're thinking Yate Loon's/Nexus.