My Mother boards asus M4A78LT-MLE but when computer start fast screen appear " this cpu is not supports please call asus costumer care" and pres F1 enter bottom to star contnue, processor fan speed high, my processor X4 965 3.4GHZ , tell me how solve this problem?

Click here to view the list of supported processors for the ASUS M4A78LTM LE Mainboard.

The AMD AM3 Phenom 2 X4 965 3.4GHz is not supported as it is a 125Watt or 140Watt Processor.

The ASUS M4A78LTM LE Mainboard supports up and including a 95Watt Processor.

Therefore you either need to downgrade, purchase a Processor that is supported as shown in the list or purchase a Mainboard that supports your AMD AM3 Phenom 2 X4 965 3.4GHz Processor.

I myself would go for an ASUS M4A88TD-V EVO/USB3 Mainboard, its a good companion for that monster of a Processor you have got.

See if you are able to return the Mainboard and purchase the ASUS M4A88TD-V EVO/USB3
Click here for it's Specs.

There is also the cheaper ASUS M4A785TD-V EVO
Click here for it's Specs.

Tell me how it goes!

All the Best!
damnor01