Unable to use 4 sticks of ram?

[OreoThePanda]

I can use two sticks of ram but not any more than that.All of the new ram I bought are fine. I tried all of them.Also tried to check if it was the mem slots but it wasnt
all of the mem slots work fine.When I try using four sticks of ram it restarts.
over and over and over again?

 

[rolli59]

Did you try resetting BIOS before starting with all sticks in?

 

[OreoThePanda]

Did you try resetting BIOS before starting with all sticks in?

I've tried it and it still restarts itself.

 

[rolli59]

Can you get into BIOS and set speed and timings manually? Aswell look at bumping your volts up 0.05 volts at a time. What board and CPU and ram?

 

[barto]

The problem could be the fact that the additional kit overloads the memory controller. It's not an uncommon occurrence. Your motherboard by not be able to take more than 2 sticks.

 

[rolli59]

That is where voltage bump comes in to help the controller.

 

[OreoThePanda]

Can you get into BIOS and set speed and timings manually? Aswell look at bumping your volts up 0.05 volts at a time. What board and CPU and ram?

and yes I can set the speed and timings manually but when I do it freezes.
I have an AMD Phenom II X4 990
I got DDR2 Kingston 4 gb PC2-6400 800 mhz

 

[rolli59]

In bios if you can get there make sure command rate is set at 2 T when timings are set and trial and error start bumping the volts up like I said before, normally you can go to 0.2 volts over what is std but do it in 0.05 volts increments.

 

[barto]

That is where voltage bump comes in to help the controller.

Noted.

 

[Tradesman1]

Try raising the CPU/NB voltage + 0.10 (that's your MC 9memory controller) voltage, AMD tends to (and has) tuned their CPUs towards 2 sticks of DRAM, going to 4 often requires a little help to the MC via the voltage to it as well as the DRAM voltage