Ram Slot A not reading

[xrionitx]

I Changed the processor from i3 to i7, i have two DDR3 ram sticks, one of 8 gb and other 4gb, but when both are installed, the pc won't start and three beeps are heard, and when i remove the ram from slot A, then pc starts up..?!

 

[NDC1995]

How many RAM slots do you have? If 4, then are you using the corect places of ram?

Are you sure both ram sticks are in perfect health? (i.e. do both work ok if you install them in slot B or whatever?)

 

[xrionitx]

How many RAM slots do you have? If 4, then are you using the corect places of ram?

Are you sure both ram sticks are in perfect health? (i.e. do both work ok if you install them in slot B or whatever?)

hello, i have two ram slots, which are working on i3, but when iswitch to i7 the first slot needs to be empty.