RAM not working at first...why?

[TheKracken]

Hey, just wanted to see why this happened. I was building my first PC and it wouldn't post. With some help from LTT forums and some troubleshooting, I determined it was my RAM that was preventing me from posting. I bought some new RAM, still no post. At this point, I borrowed some friends RAM, which worked, and installed Windows, drivers, etc. At this point, I gave him back his RAM and assumed I would have to buy his exact RAM from Amazon. But, at this point, I discovered something weird....if I turned my PC on, cut the power, and turned it back on again, it would boot with the RAM that wasn't working at first. After I booted the first time, I did not have any problems afterward. Why would this be? The two Ram models that didn't work at first were G.Skill Ripjaw V 3600 and Corsair Vengeance LPX 3000. Now I have 32 GB of memory running at 3200 :) My friends RAM that worked was Team Group Delta 3000.

[.Apex.]

2 minutes ago, TheKracken said:

Hey, just wanted to see why this happened. I was building my first PC and it wouldn't post. With some help from LTT forums and some troubleshooting, I determined it was my RAM that was preventing me from posting. I bought some new RAM, still no post. At this point, I borrowed some friends RAM, which worked, and installed Windows, drivers, etc. At this point, I gave him back his RAM and assumed I would have to buy his exact RAM from Amazon. But, at this point, I discovered something weird....if I turned my PC on, cut the power, and turned it back on again, it would boot with the RAM that wasn't working at first. After I booted the first time, I did not have any problems afterward. Why would this be? The two Ram models that didn't work at first were G.Skill Ripjaw V 3600 and Corsair Vengeance LPX 3000. Now I have 32 GB of memory running at 3200 My friends RAM that worked was Team Group Delta 3000.

What's your Motherboard and CPU? this could be related to your motherboard automatically resetting the BIOS after a number of failed attempts to boot, to my experience ASUS boards would require something along the lines of 5 failed posts until it determines that the BIOS settings are incorrect so then it would reset them, it might be more than 5 I'm not exactly sure

[TheKracken]

Hmmm, that may be it. I'm running a Ryzen 5 1600 af on a Gigabyte DS3H. So it would probably be motherboard BIOS incompatibility rather than CPU?

[gloop]

34 minutes ago, TheKracken said:

Hmmm, that may be it. I'm running a Ryzen 5 1600 af on a Gigabyte DS3H. So it would probably be motherboard BIOS incompatibility rather than CPU?

IIRC that’s running Zen+ which has a sh*t imc, which reduces memory stability. The max that is guaranteed is 2933MHz. 

[Haro]

10 hours ago, gloop said:

IIRC that’s running Zen+ which has a sh*t imc,

not just the imc, the fclk is also a limitation for it.