Memory problem?

[peerob]

I have an MSI 865PE Neo2 FiS2R motherboard with 512mb RAM.

I have just put an additional 512MB as follows:

Channel A (DIMM) 1 x 512MB Kingston PC3200
Channel B (DIMM3) 1 x 512MB Crucial PC3200

i thought this would work with no problem as the sticks are identical in all but brand. Instead the PC never boots - not a solitary beep. Each stick works individually but used together with any combination of slots it just will not boot. Any ideas why this might be

 

[eyeCpc]

Did you mix a single sided dimm with a dual sided? That would be a row of IC chips on only one side for a single sided while a dual sided has a row on both sides. The only other thing would be the memory timings like mixing a performance series dimm with a value tam. It's always best to make sure that "everything" is identical not just PC3200 number and DDR400.

 

[networkgeek]

also the memory sticks may be running at different timings. I have run into issues just like that where one brand would not be compatable with another

 

[eyeCpc]

When mentioning that fact somewhere else no one believed that one. But some boards are limited to memory with slower timings too. If you iinstall a 2-2-2-5 dimm on a board that won't on memory faster then 4-4-4-15 pr some actual slower set of timings that will stall the system.