[Q] PC Continuously on Off/On Loop After RAM Change

Hardware Hub Other Hardware
1

Hi,

I recently bought a complete custom-made PC from someone which had been working great until this moment!

The PC has a total of 6GB of RAM installed - 1x 4GB DDR3 Kingston stick at 1,600MHz and 1x 2GB Transcend DDR3 at 1,300 MHz.

Thought I should increase my RAM and get similar ones; I plucked the 2GB Transcend one in order to get a bigger Kingston one and tried to turn on the PC with only one RAM only to find out that it will turn on for about 2 seconds, turn off automatically for another 2 seconds, turn on again, so on and so forth.

Now I'm not a tech-savvy guy so I don't know what wrong I did there, but I did check that the RAM is properly-seated and fitted in. Can anyone of you [who has experienced the same thing] tell me what's wrong and how do I fix it?

My PC specs are:

  • i7 4790s
  • Radeon R9 290
  • ASUS H81M-E
  • Corsair 650W PSU
  • 2TB HDD

Also, since I'm new here; I don't know if I created the thread in right section or not.

2

Some motherboards really don't like different sized or speed DIMMs. I would try the system with one stick at a time and see if you can get it to boot off of one of the two.

3

I actually tried it with single Kingston one and it didn't turn on. I'll try doing so with the Transcend one once I get back home and report back.

EDIT: Placed in the Memory Module a bit tighter and it worked fine. Thank you!

4

I had this problem with a friends' pc, it did the same. The reason was that slot 4 (furthest away) and 2 away from the CPU should be occupied, while slot 3 and 1 did not work if nothing was in the other ones. So if I had only one dimm, I'd have to put it in slot 4. Two dimms slot 4 & 2. and by the third dimm it didn't matter which slot out of 1 & 3 I used next.

EDIT: Other motherboard may want it differently. Try switching it up a bit.