Connecting multiple fans PSU or M/B?

Hello

I recently purchased and started assemling the following setup....

CPU: AMD Phenom II X4 955 Black Edition
CPU Heatsink: Thermalright Ultra-120 Extreme & Sythe S-Flex 800rpm fan
Motherboard: Gigabyte GA-MA970XT-UD4P
RAM: 2 x OCZ Technology DDR3 PC3-10666 1333Mhz 4GB (2x2GB)
Graphics: XFX ATI Radeon HD 4870 512MB DDR5 (HD-487A-YDFC)
HDDs: 4 x Seagate 160GB SATA 3.5IN 7200RPM 8MB SATA300
Case: Antec Three Hundred (plus extra 3 x Antec 3 speed 120mm case fans - no LEDs)
PSU: Thermaltake Toughpower 750W
DVD: LG 22x DVD RW

With the exception of the CPU fan header, the M/B has two other fan headers, but I will have the two inbuilt fans (top and rear) and 3 additional fans (two front, one side). I am looking for advice on how to connect them all.

I notice that the fans all seem to allow pass through (if that is the correct term) power connection. Is it advisable to use? I was thinking maybe connect the two inbuilt fans to one header and the three added to the other? That way the M/B can control all the fans.

I will also need to convert from the 4 pin power connection of the fans to 3 pin for motherboard attachments but I have seen such adapters and I could do with an extension anyway to keep my cabling tidy.

FYI: They are all Antec 3 speed fans, regardless of whether they are connected to the motherboard or not any recommendations including the settings I should choode for each would be appreciated too.

Regards

Thanks for the response, in short I don't know whether I should or could connect all to M/B, hence my post (maybe I should have mentioned this is my first system build in about 5 years, things have changed somewhat) :-)

So which ones should I M/B connect and which PSU?

My thoughts....

Two in built (top and rear) to M/B, still not sure what I should set the 3 speed selector at, I guess High as the M/B will dial right down anyway?

Three additional to PSU (molex) and all set to Low?

Thanks

right i bought a artic cooler pro 64 for my cpu and it has occupied a 4 pin white socket....

i have one 120 mm fan that has 3 pins put into another socket...


now where do it put my 80 mm fan i cant seem to find anymore sockets,,,, they gave me this little converter thing with the zalman cooler but it looks the same to me, can i even put this thing in or am i out of space....


ive got a asrock n68-s

ive herd sum ppl connect direct to psu how do u do that?