[SOLVED] Frequent BSoD after RAM upgrade

[Confused Builder]

My PC had 1 gb hynix ram. I bought a new 2 gb hynix ram.
I tried to place the ram in the second port (only 2 ports).
But the pc was rebooting again and again with BSoD and showing windows loading files. Then I tried with the new ram only in the 1st port. It worked and then i placed the old ram in the 2nd port. This time it was agin like the 1st time.
So I decided to use my new ram only.
But now sometimes there is random Blue sceens with message irql not less or equal errors. I didnt change any BIOS settings when I installed the new ram. Is there anything I could to prevent further blue screens??

RAM SPECS
OLD hynix
PC6400S-25330
1GB MB DDR 2 800MHz CL2.5
HYMD564M646CP6-CF
There is also 0815A written.

NEW hynix
2GB 2RX8 PC2-6400U-666-12
HYMP125U64CP8-S6 1809

Advices are appreciated.
Thanks in Advance.

 

[cin19]

Because you mixed the RAM, that is problem. You should return the 2GB, then buy the Kit of 2X2GB or 2X4GB if your PC can support the 8GB memory.

 

[Confused Builder]

Because you mixed the RAM, that is problem. You should return the 2GB, then buy the Kit of 2X2GB or 2X4GB if your PC can support the 8GB memory.

But I'm now using only the 2 GB ram. Should I have changed any voltage or other settings in BIOS??

 

[Confused Builder]

But I'm now using only the 2 GB ram. Should I have changed any voltage or other settings in BIOS??

 

[Confused Builder]

Today BSoD appeared again when I was running Chrome. The error message was memory management