Please go easy on me, I am a novice.
In short (as short as can be, I suppose), I bought new RAM. Second hand, but confirmed working by seller. Took the old out, put the new in, no POST. Attempts to boot repeatedly, but never actually makes it. Old sticks are DDR3 1.5V 1600MHz UDIMM 4GBX2. New are also DDR3 1.5V 1600MHz UDIMM, but 8GBx2. Motherboard (soyo SY-H81-ITX) has a limit of 8GBx2 from what I can see, so the new are at this limit. My current sticks, I found out, have been running at 1333MHz, though the board is definitely compatible with 1333MHz and 1600MHz. I also see that the system is running my old sticks at 1333MHz. I don't know if that's relevant but doesn't hurt to mention.
I did hear the RAM click when pressed in. Both latches clicked for each stick.
What I have tried since:
- Removed GPU and am working with integrated graphics for now, it's easier to maneuver without it in the way.
- Took out the new sticks, replaced the old and tested to see if things still worked. They do.
- Removed old sticks once more, took out CMOS, and gave it 10 minutes or so.
-Put in only one stick of the new pair in the first slot. Now it won't POST again.
- Pulled out that 8GB stick and swapped in the other. Same result. No POST, still attempting to boot repeatedly.
I have tried to make searches for this to troubleshoot on my own, but all the other problems were seemingly solved by things like actually seating the RAM properly or remembering to actually plug in the power cable before attempting to boot.
Some hardware info:
Motherboard- soyo SY-H81-ITX
Old RAM- SK Hynix HMT451U6BFR8C-PB
New RAM- Kingston KVR16N11H/8
And if it's relevant, BIOS date is 11/20/2015, and version is 4.6.5.
Please let me know if I've missed any information. As I said earlier I am very much a novice, and so I don't know what's actually needed to diagnose this issue. Thank you to anyone who can give me a hand here.