How to tell if a RAM module (DDR3) is buffered or unbuffered RAM?

I have an HP Desktop 705 G1 SFF(small form factor) that supports DIMM - DDR3, non-ECC, unbuffered RAM, with max support for 1600 MHz.

I bought a pair of DDR3 RAM sticks (the one in pic) which has the capacity of 8GB - 1600 Mhz, to replace the ones that was used in the motherboard. The old RAM is also 8 GB, but has a lower clock speed of 1333 Mhz.

Once the RAM was installed on the motherboard, I checked Task Manager/ Memory, and it showed the speed of 1600 Mhz. By looking at the chip counts, I know that these are non-ECC modules (these sticks have 8 memory chips on each side).

But, how to verify that these are unbuffered modules? (since, some items listed on Amazon.com don't function exactly as described).

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