That CPU is not supported on those boards. Look at the CPU list. That might be the problem.
sure is not, oficialy not- is mod. the same is with my another mobos GA-P35-DS3L GA-P35-DS3R oficialy not supported, however after mod is supported, on CPU adapter LGA771 to LGA775 and bios with microkodes for xeons and thats it.
With the mobo from beginung was a bit starnge situation, from batch 10 pcs of E5450 SLBBM only 5 was runing, I thought that I got not working cpus, but then put them and test on GA-P35-DS3L and all working corectly.
I thought that are 2 options
0-not working
1-working
but it seams that is 3rd one working in 50%
Tusday I will prepare clean win7 and hope I will find item working 100% with the mobo
Will let know about result