Memory DDR2 is causing problems

[rocket84]

Mi old cpu is causing problems, I have 4 memory, 2 800mhz and 2 667 in my motherboard. I have tried many combinations, only using the 2 of 667 work correctly.
But when adding other memory, the first, cause bluescreens when playing some game and with the other, the monitor not turn on.

My question is if are those normal faults or if could be other thing. Thanks

 

[VirtualLarry]

The RAM could be bad or incompatible. Or your RAM slots where they were plugged in are defective.

 

[XavierMace]

Does your CPU/Motherboard support DDR2-800?

 

[Ketchup]

How does it operate if you just run the ddr2 800 sticks?

 

[denis280]

my motherboard

What brand and model

 

[Elixer]

I also hope you aren't yanking the DIMMs out of the slot with the computer "off" but still connected to power/ PSU still on (if it has a switch)?

 

[rocket84]

motherboard is asus p5q, only with ddr2 800 cause bluescreens, using same slots where i have now 667 ram.
All the wires are disconnected when manage cpu.
I have 4 memory running correctly before, maybe a little problem, tabs firefox, crashing sometimes, and i have to reload.

 

[RLGL]

It is best if the ram sticks are all the same brand and have identical spec's. It is waste of time to fight mis-matched ram

 

[denis280]

the Mobo.d'ont support ddr2 800,and if it did it will run at 667. ddr2 don't like mixmatch

 

[fralexandr]

Is the ddr2 800 "amd only"?
What does your bios say about the ddr2 800 ram when it's plugged in, ie timings, voltage, etc?