What kind of RAMs were used on older HP machines?

Question

Iron

Like DDR2 SDRAM, PC3200U. But the key does not match any other DDR2 RAM that you can buy in the store. Although the number of contacts is the same, visually, they have the same size.
The question is: what kind of form factor is this (at the right bar), and what kind of analog can be used instead of it, respectively?
HP Compaq dx6120mt system unit. Nanya operative.
Here are pictures of this RAM on skydrive: 1drv.ms/1r7scNo I
compared it with DDR and DDR2 sticks. Everyone's keys are different. And this is definitely not DDR
Here is their comparison, I took pictures just in case
3.

Answer 1

It seems to me that there may be RIMMs. This is me, offhand, but yes. telepaths in the solarium

Answer 2

DDR first, just ddr, not ddr2.
bit.ly/1sRarpF

Answer 3

Show a photo of the bar or write the model of the HP machine.

Answer 4

what kind of question is there no description of what kind of piece of iron you have and there is not even an ozu marking, telepaths on vacation, come on photos and markings

Answer 5

The key determined the supply voltage, there are 3 types / locations of the keys.