ANTEC SP 2.0 FAN CONFIGURATION OPTIONS

CAUTION: Before opening a power supply, find out how to do it safely.


Stock - 80x15mm intake fan + 80x25mm exhaust fan. Exhaust fan is turned off until temperature threshold is reached.

Configuration 1 - 80x25mm intake fan mounted outside of the psu case using the stock fan controller. No exhaust fan.

Configuration 2 - (Nov. 27, 2005) 80x15mm intake fan with an 80x15mm exhaust fan both running at the same speed.




//=============== Configuration 1 ================

Replace the stock XFan 80x15mm intake fan with a Panaflo 80x25mm FBA08A12M-1BX and remove the Top Motor 80x25mm exhaust fan for better air flow. By using a 25mm thick fan with a lower top rpm, the fan controller can be used without modification. The fan will run slower but produce more air flow in a less restrictive environment than the original SmartPower design with a main intake fan and an auxiliary exhaust fan.
Panaflo FBA08A12M-1BX
- 32.1 cfm at 2450rpm
- 11.0 cfm at 850rpm

Other fan options - http://forums.silentpcreview.com/viewtopic.php?t=25323



SmartPower 2.0 with stock fans removed.
The printed circuit board noted in the photo is part of the modification that allows psu fan speed to be monitored by the mainboard. The first SmartPower models with the fan monitor cable connected to the mainboard ran intake fan at full speed. Its also interesting that the first smartpower 2.0 I received used medium speed fans. The replacement with a working fan speed monitor used high speed fans, although they never ran at full speed.



Early smartpower 2.0 unit w/o mainboard rpm monitoring.



The exhaust fan is easily disconnected and removed.
I left the intake fan connector in place and cut the wires near the fan since the rpm monitor wire is soldered in place.



Standard 80x15mm intake fan.
- 31.2 cfm at 3000rpm
- 11.0 cfm at 1100 (ususal speed with medium loads)
- High speed sleeve bearing
This fan would usually run at about 1100rpm with very little noise. The top speed is 3000rpm, but has never reached that speed.



Standard 80x25 exhaust fan.
- High speed sleeve bearing
This fan would start in my system with one instance of cpuburn. Toss it!



A new fan header was installed to allow easy fan replacement.
The Panaflo medium speed runs at 850rpm with light to medium system loads and has better air flow at the exhaust opening than with the original fans. The exhaust fan restricted air flow when not running and was noisy when running.



Plenty of room for attaching cables.




//============== CONFIGURATION 2 ==============

2 Panaflo 80x15mm fans in series, temperature controlled and running at the same speed. Two fans in series produce no more air flow (CFM), but twice as much pressure in free air. This makes sense in a restrictive power supply case.



Panaflo FBA08T12L
- 80x15mm
- 21.9 cfm @ 2000rpm
Very quiet, nice fan.



Dual panablows installed.



Smartpower 2.0 intake side.
Nicer than hanging fan outside of psu case as in the previous arrangement. Fans in this configuration are controlled by a T-Balancer. I especially like this setup as it seems to povide more air flow at the same noise levels.


References:
Fan Swap Sticky

Edits:
- added new photo
- added Configuration 2 photos

Cool project, I'll be keeping tabs on this to see how it goes - might be something to do to mine after I get my HD silenced up . I would think having a 25mm fan without the restriction of the back fan would give more than enough airflow - I can barely hear my PSU fan as it is, even with the rest of my fans turned off.

Frank, I added a link to the PSU modding sticky for this thread.

Thx. I was planning to link your fan swap sticky as a reference so I will do that now. - FG

bumped on behalf of Frankgehry. Updates in the first post.