Memory Problem Kingston HyperX KHX1600C9D3/8GX

[Bobulin]

Hi.
I have double Kingston HyperX KHX1600C9D3/4GX (Kingston HyperX KHX1600C9D3/8gb together) in my pc, recently i bougt same 2xKingston HyperX KHX1600C9D3/4GX set so at this moment i have 4 DIMMS (4x4gb) i saw something strange about the two newly bought set:
1- the radiators look diffrent, i tought that mayby its just diffrent revision
2- the "new" dimms are "Kingston 9905403-199.A00LF" as the aida64 and cpuz says. but the sticker says KHX1600C9D3/8GX. And finally, i cant seem to get it working at 1600mhz (i get bsod, freezes etc). Xmp fails to do its job. It seems stable at 1333mhz. Its sad because i've managed to get first set working at 2080mhz
and now all 4 dimms need to work on 1333mhz. Please help! Sorry for my poor english.

 

[Bobulin]

Also aida64 says that the "9905403-199.A00LF" was manufactured in 2011 and the "KHX1600C9D3/8GX." in 2013...

 

[Tradesman1]

Mixing DRAM is a crapshoot, even two identical sets. Try setting manually to 1600 9-9-9-26 and DRAM voltage at 1.6