need help upgrading my ram

[Kaitlin Kaschak459]

ok so i have an hp z400 desktop its the 4 dimm motherboard and i need to upgrade the ram right now i have 12 gig ram 3 4 gig sticks but im having trouble finding a matching 4 gig stick heres my speccy info

Type DDR3
Size 4096 MBytes
Manufacturer Micron Technology
Max Bandwidth PC3-10700 (667 MHz)
Part Number HMT351U7MFR8C-H9

so what 4 gig ram stick can i buy to max out my ram to 16 gigs also if i buy faster ram will it down clock to the lower speed of the other 3 sticks and if so will that decrease my performace

 

[Tradesman1]

Adding DRAM is a crapshoot, it may play with what you have or it might not - there are no guarantees. If going to mix try and match data rate, timings and voltage to what you have. If any problems give a shout and we can try some adjustment, best would be to get a set of the full amount you want need

 

[Kaitlin Kaschak459]

gonna stick with my 12 gigs for now