the short answer is Not its never going to be compatible.
Long answer: The E5404 Processor belongs to the E5400 Family of processors which, apart from other things have socket 771.
This motherbaord you showed us supports only the 5500 series and 3500 series which as you mentioned uses socket 1366.
Thank You, Thank You, Thank You!
You have accomplished the following:
1. Now I won't accidentaly open the processor up when it arrives.
2. Because of #1, I will be able to return it with the greatest of ease
3. I will not be dissapointed when the processor does not work in my system.
Because of your response to my posting, I have ordered this item:
Since I messed up last time I tried to order this processor, I would appreciate it if you would critique this item and see if I messed up again. The little bit of reading that I have done leads me to believe that the LGA 1366 socket is also known as Socket B.
Again, PLEASE let me know if I messed up again...
Steven P. Ulrick
Great processor. i had a chance to try it for a few hours and it sure is fast.
The only thing to keep an eye out for is that this processor has a Slower QPI link to the chipset, does NOT support hyperthreading and does NOT support Turbo Mode.
My personal choice would be the E5520 which support all the features above.