I was using 2 pcs 3000Mhz ram before and I bought 2 more ram of the same brand but I bought 3200. So 2 of the RAMs are 3000 and the other 2 are 3200 Mhz but it works very comfortably at 3000 Mhz stably. I have been using all 4 of them for 3 years and I have never encountered a problem such as a blue screen. I am selling the old ones because I bought more powerful parts for my computer. I do not sell them one by one. If you buy the ram, do not forget to select the profile from the bios menu and set the Mhz value. Finally, I do not speak Latvian, please contact me via whatsapp and I can reply to you using translation.