strange... F3-12800CL7D-4GBRM

[subie]

Mobo- GA-870A-UD3
Ram- F3-12800CL7D-4GBRM
CPU- 555 BE C3

This build has been a pain in the ****! 3+ days of hair pulling but it seems like I have things under control now.

With both sticks of ram in (tried both dual and separate channels) I could not get any OS to load completely. Win7 finally loaded but BSODed continually with ram set at mobo default (1333 9-9-9-24 2t). Memtest (ran in windows) tossed out errors within a second of starting. I think the install partially failed. I then played with timings until I hit 1600 7-8-7-24 2t at 1.6v and nb of 1.1. It passed a 100% sweep of memtest but I was still getting BSODs.

Also, several Linux distros would not install. Finally I pulled one stick of ram and was able to install Linux and reinstall windows without a problem. Strange?

After installing the 3 OS that I wanted I plugged the other stick back in and have now completed a 200% error free memtest86+ with mobo stock ram settings (besides dram 1.6v).

My question is... ram? mobo? amd cpu? or a crumby combo of all 3?

Now to try and unlock those extra cores and play around with timings now that I finally have stable OS installed.

More or less I wrote in to share what worked for me when I was having very strange problems that I hadn't read about yet. Hopefully this will help someone out.

Cheers!

[GSKILL TECH]

Thank you for your kind intention to share information.

The CPU will not be capable of rated timings, so you will need to use 8-8-8-24 timings instead of 7-8-7-24. Also, raise CPU-NB Voltage +0.1V. Once this is complete, your system should be more stable.

Thank you
GSKILL TECH

[subie]

follow up

Thanks for the reply- Gskill guy!

Problem has been isolated! One stick passes memtest86+ in all 4 dimm slots and the other stick throws errors at 47% in all 4 slots. Looks like I have one bad stick. I have tried a few dozen different timings with the same results.

I am going to RMA the sticks back to Newegg tomorrow and pick up a set of white listed F3-12800CL7D-4GBECO (staying with gskill for now). Seems like that set will have a better chance at hitting tight timings and 1600.

I know that this happens now and then- just sucks a bit to be down for a few days.

Thanks,
Subie

ps- with the one good stick in all three os are working great. windows was terrible with both stick in- tons of errors and BSODs.