Can't add RAM?

Question

RAM

There is a Pegatron IPI43-TTM mother, 775 socket 4 slots for ddr2 RAM. Already worth 2 dies of 1 GB. Bought 2 more for 2gb. All memory of the same frequency, only new ones from another company. Separately, old memory and new memory work in any slots. If you add at least one plate of another company, the speaker beeps, the PC does not start. I pulled out the battery on the motherboard for a few minutes, it did not help. What else can be done?

Answer 1

The originally spec supports 2 Dimms only, therefore, we only guarantee the 4 Dimms with our qualified Memory list.

https://forum.ixbt.com/topic.cgi?id=4:121775
a number of useful links and thoughts - in the same place.