What is my RAM Issue

[AMD_Fan]

So when I first built my rig I ran into memory issues and eventually I had to settle with 2GB of DDR3 1600 so when I bought a 4GB 1600 stick my PC wouldn't boot up so I took out the 4GB stick and replaced the 2GB stick and the PC booted up with no issue. So I look up the speed and it says 1066 and it also said 1066 on the BIOS screen as well. So what's the issue if there's an issue

 

Thanks for reading and thanks for all the help

[TrigrH]

there isnt one?

[JaegerB]

When you ask a question and answer it in the same post.

[AMD_Fan]

If I didn't explain correctly I bought 1600Mz RAM for my motherboard which it can handle but when I install it it doesn't work. Why does only 1066Mz work or is that the speed

[Gaussen]

9 minutes ago, AMD_Fan said:

If I didn't explain correctly I bought 1600Mz RAM for my motherboard which it can handle but when I install it it doesn't work. Why does only 1066Mz work or is that the speed

1600mhz = xmp profile

1066mhz = default profile

533mhz = each stick speed(cpu z see like 2x533 = your current speed[2 = quantity of stick || 533 = speed that read by cpuz])