Ultra-120 Extreme fan question

Hi folks,

I'm in the process of installing a Thermalright Ultra-120 heatsink to my cpu, and of course now I need to install the fan. I bought the Scythe S-Flex SFF21F, which comes with a 3-pin connector. The connector on the mobo for the cpu fan has 4 pins. So my question is this: do I connect the 3-pin connector to the 4-pin cpu fan socket on the board (if you look at the top left picture in http://www.hardwarecanucks.com/foru...rampage-extreme-x48-motherboard-review-6.html it looks like that's what they did, the review at http://www.anandtech.com/casecooling/showdoc.aspx?i=2941&p=2 also implies that you can plug a 3-pin connector to the 4-pin cpu fan socket), do I use a 3 to 4-pin adapter and plug it into the 4-pin cpu fan socket on the board, or do I use the included molex adapter that came with the Scythe fan and plug it into a standard 4-pin molex?
Thanks!

Just connect it, the 4 pins connector at the mobo side is downward compatible with 3 pins fan with rpm sensor. its just the 4 pins fan design is newer with new separated pwm signal line and usually work with higher pwm frequency > 20Khz.

You should be able to connect it, the piece of plastic on the behind the pins should allow to you connect a 3 pin one

voidale said:

where can i buy the ultra what website is the best?

Click to expand...

Depends where you live. Do you live in the US or elsewhere?

works fine for me, shuodln't differ for you
it must be like one of those auxiliary things like the CPU 4 and 8 pin connector