Problem with B150 fatality and 4 x 4G ram

rastafari wrote: Hello, I have a Asrock Fatality B150 Gaming K4 MB and 2 x 4G ram Corsair Vengeance LPX DDR4 2133Mhz. Everything worked fine and I decided to upgrade to 16G ram by purchasing an other 2 x 4G kit, identical to the previous.  When I installed the 2 extra dimms, I've had a BSOD. I did the basic troubleshooting. I tested each dimm individually and then in pairs. Right now, everything seems fine if I install up to 3 dimms (I tried all combinations). When I install the 4rth one, BSOD. Has anyone else faced that problem? Do you have any ideas what could cause the problem? Any suggestions? Thanks in advance, Jim

You may have purchased another set of the same model number of Corsair memory, but the two sets of memory are not a matched set.

"Memory manufactures" like Corsair buy memory chips from another manufacture, they don't make their own memory chips.

The actual memory chip manufacture may not have the same memory chips in stock when the second set of memory was built, or the new set may be using memory chips from a different manufacture.

Regardless of what the differences between the two sets of memory is, they do not seem to be matched in some way.

You said you tried each DIMM individually, so you know all of them work, right? If you are able to sort the four DIMMs into the old and new set, try the old set in one memory channel (A1 and A2), and the new set in the other channel (B1 and B2.) This way you don't have the two sets mixed in one channel, which may allow them to work.

Did you clear the UEFI/BIOS after inserting the new set of memory? If not, do that after putting each set in its own channel. Be sure to have all the memory settings on Auto, at least initially.

You may need to increase the DRAM voltage a bit to allow all four DIMMs to work at the same time.

Download CPU-Z, run it and click the SPD tab. That will show the basic memory latency settings programmed into each DIMM. You can select each DIMM individually with the Slot # list, on the upper left of the display. If you have each set in a different channel, going from slot 2 to slot 3, see if any of the values in the lists change at all. If they do, then the two sets are very unmatched. You can also see if the manufacture of the chips changed on that screen.

How long after the PC booted did you have the BSOD? Right away, or when doing something specific?

Hello again,

I tried to test with 2 x 8gb ram (same as above) an I have a similar problem. It boots, but after a while (~15') it crashes. I removed one dimm, and the problem persists. I tested the ram on a different pc and it seems stable.

I also run windows memory diagnostic and the test passed succesfully.

Any ideas?