Mixed Ram Speed Same Brand, Safe?

arvyarc

Prominent
May 17, 2017
3
0
510
which is better for ram? same brand different speed or different brand same speed?
I mean I bought and Alienware 17 last 2014 and immediately upgraded the top RAM toCorsair Vengeance Performance 16GB (2x8GB) DDR3L 2133MHz CL11 Laptop Memory Kit (CMSX16GX3M2B2133C11) .
Few Years after, I decided to upgrade the bottom two (behind the keyboard) and I can no longer find the same Corsair Vengeance 2133Mhz. So I settled for Corsair Vengeance Performance Memory Kit Unbuffered SODIMM 16GB (2x8GB) DDR3L 1866 DRAM CMSX16GX3M2C1866C11 1.35V .

Is it okay that I'm using that RAM Set? or should I get a HyperX 16GB (Kit of 2) 2133MHz DDR3L CL11 1.35V SODIMM HyperX Impact Laptop Memory HX321LS11IB2K2/16 to match speeds with my older RAM Module?