RAM modules upgrade compatibility issue??

[nammy22222]

Hello,

My computer had natively 2 rams of 1GB each (2Rx16-PC2-6400S-666-12)

I wanted to upgrade to 2 rams of 2GB each. The laptop can support up to 8GB ram.

Problem when i put the new HP SPARE Rams (number 598858-001, 7F1034) (2Rx8 PC2-6400S-666-13-F1 ) the computer juste doesn't strat at all. And nothing diplayed on the screen.

I tried them one by one.

thanks

[Huffer · Accepted solution]

This is the specified memory for Intel processor models:

2048-MB 482169-001

This is low density CL = 12 memory

http://www.ebay.com/itm/2GB-PC2-6400-Laptop-Memory-HP-Part-480382-001-482169-001-483194-001-483233-0...

If this is "the Answer" please click "Accept as SOlution" to help others find it. 

[nammy22222]

So you mean that "13" stands for high density.. so its not compatible? **bleep** it -_-

Thank you

what is the difference between "12" and "12-E3" please?

[Huffer]

-12 and -13 are "latency" not density. Latency is about the way the uptake of data from the memory to the processor is timed with each turn of the processor. Density is how many black blocks of memory chip are on the side. 4 blocks per side is high density and 8 blocks per side is low density. DDR2 is not usually so finicky, but it appears that the chip you tried to install is just different enough that it was not compatible. 

-12 and -12 E3 are the same. E3 is a reference number by the memory maker, not the latency.