Open the online Inspiron 3891 Setup and Specifications PDF to page 15 = [IMAGE] Here are the tested/validated OEM Inspiron 3891 memory sticks that will automatically downclock to either 2933MHz or 2666MHz = 36FTX 4GB, 3200MHz, 512x64, Unbuffered, DDR4, 288 pin, Single Rank, 1.2V, Non-ECC9CXF2 8GB, 3200MHz, 1Gx64, Unbuffered, DDR4, 288 pin, Single Rank, 1.2V, Non-ECCDK8NX 16GB, 3200MHz, 1Gx64, Unbuffered, DDR4, 288 pin, Single Rank, 1.2V, Non-ECC732YD 32GB, 3200MHz, 2Rx8, Unbuffered, DDR4, 288 pin, Dual Rank, 1.2V, Non-ECC
Recently purchased Inspiron 3891. I wanted to upgrade the ram. I know its currently 8GB & 4GB DDR4 3200 for total 12GB of ram. I purchase 16x2GB DDR 2666 ram, when installing the new ram, I cannot get the pc to boot even to bios. I can get PC to boot using 8GB and 16GB stick together but any combination using just 16GB stick (ie 1x16 or 2x16) will not work whatsoever. I have the 16gb in slot 1 and 8gb(it came with) slot 2 and it is able to boot. Any suggestions? Normally I would install new RAM and clear CMOS but there isn't a cmos reset on this mobo. Any help would be grateful. thank you!
Inspiron 3891, ram upgrade problem