[SOLVED] OK To Mix older spec DDR3-1333 with newer DDR3-1600 on the same board?

[cpumobopsu]

Intel DB75EN motherboard (circa 2012) 4 sockets. Existing 2x2GB (DDR3 PC3-10600 • CL=9 • Unbuffered • DDR3-1333 • 1.5V • 256Meg x 64) from Crucial. Can modules for this board currently-selling also from Crucial (DDR3 PC3-12800 • CL=11 • Unbuffered • NON-ECC • DDR3-1600 • 1.35V • 256Meg x 64 ) go into the 2 empty slots and coexist with the older-spec RAM? Or need to better match modules? Realize that running the 1.35V at 1.5V is not a problem, but the rest of the differences? (Fine if all run at the older RAM specs, just want no conflicts etc.)

Thanks for any comments.

Extra detail:
Intel Core i3-2125 (Sandy Bridge) Processor with Intel HD Graphics 3000
Current RAM Crucial CT2KIT25664BA1339 (2x2GB), considering adding CT2K25664BD160B (2x2GB)

 

[lvt]

I don't see why it's not OK, they are all DDR3.

 

[Karadjgne]

Yes. It's fine to mix, hopefully they'll work. You have 2 options. The pc will automatically run the ram at the lowest speed for all the ram, so 1333MHz for all sticks, but it might be possible to OC the 1333MHz sticks to 1600MHz, and then you can run all the sticks at 1600.

I'd try and OC the 1333MHz by themselves first manually. Set the timings and voltage to the same as what's on the 1600MHz sticks.

 

[SamirD]

They'll be fine.

 

[BFG-9000]

DDR3 was current for 10 years, so was made in three density levels. Sandy Bridge can support the low and medium density chips (2Gbit or 4Gbit, respectively) but not the high density 8Gbit that became common after 2013 (before that it was listed as "AMD compatible"). 256Meg x 64 is 8 chips of 2Gbit low density so would even work on Core 2 Duo.

However at this point there's not that much price difference between 2GB or 8GB sticks, and your system should accept 8GB sticks provided they have 16 chips on them. I'd look for a 2x8GB kit, as even if your old ram turns out to not be compatible with it you'd then still have 16GB