Yep, will get about 6C off the temps. Alternatively if you only have a few you can do the cooling mod (reverse both boards so the heatsinks both face outwards, then 2x120mm per blade blowing directly onto each heatsink).
Thank you, i'll go and get them tomoz and report back
By adding one of http://www.corsair.com/en/air-series-sp120-pwm-high-performance-edition-high-static-pressure-fan-twin-pack
Fans in a pull config to my S1's, my average temp drop is 8c (one dropped 10c!)
Probably hoovering out up to 5mm of dust from behind each fan has probably helped massively too.....
They've been spinning since December lol
Avg fan speed is now 2000ish and I can now hear myself think again.
(I suppose you don't notice them gradually getting louder until it is ridiculous)
The only downside is the fans didn't come with the correct length / diameter screws, so i've cable tied (zip tie) the fans to the pull end
There is also a ridge on the 4 pin that needs shaving off (carefully with a Stanley knife)
Does anyone know the fan screw size for ordering please? So i can finish this properly, cable ties are handy but not what i'd term as a permanent fix.
Thank you Dogie
the desired effect has been achieved