Gigabyte GA-H77N-WIFI, motherboard gone bad?

[mxnerd]

Pair this motherboard with i5 3470, ran for 2 weeks, Win 7, mostly OK. Since 2 days ago, the mouse and keyboard seems getting very slow sometimes, the keyboard especially many times would not respond then all of a sudden the keys waiting in the queue jump out all at once.

Then today it start to have video output problems. Sometimes I can see the BIOS bootup screen, most of the time I couldn't. Replace the PSU with another, same thing. Reset the CMOS, same result.

I wonder whether the motherboard has gone bad. I did not overclock at all. 16GB of 1333 DDR3. I don't think the CPU is the culprit.

Any guess?

 

[mxnerd]

replaced i5 3470 with i3 2100 and seems a bit better. but the motherboard just seems just can't maintain dual monitors setup reliably, constantly dropping 2nd monitor.

 

[gpse]

download and install the latest bios perhaps