The difference between DDR3 and DDR4 | PC Gamer
Crucial 8GB (2 x 4GB) 204-Pin DDR3 SO-DIMM DDR3L 1600 (PC3L 12800) Laptop Memory Model CT2KIT51264BF160BJ. ... Cons: The DDR3 ram doesn’t work in the Gateway P-7811 FX laptop because the laptop uses DDR2 ram and is not upgradable to 8+GB of DDR3 ram.
Amazon.com: HUANANZHI X99-TF-Q ATX Motherboard with LGA 2011-3 ...
Flexible Memory & Ultra-Fast Storage: X99 motherboard equipped with 8 DIMM slots supporting up to 128GB DDR3/DDR4 memory (DDR3 limited to specific Xeons) and ...
MSI PRO H610M-B DDR4 Motherboard, Micro-ATX ...
Unfortunately, DDR4 is not backward compatible, so neither is DDR3 forwards compatible. Putting a DDR3 stick into a DDR4 socket would be bad for the stick and the motherboard, perhaps even causing irreversible damage.