Question Ram has different versions although they are the same stick

[neovoid]

Heyy there,
Im confused about my 2 ram sticks which are the corsair vengeance ddr3 8gb 1600 mhz
One stick says ver 2.21 and the other one says ver 2.20
Is there any difference that i need to know or is it the same thing?
Both have the same model number CMZ8GX3M1A1600C10

 

[Barty1884]

Likely a minor revision, but potentially using a different supplier etc.

Shouldn't inherently be a 'problem', but if you start running into crashes, lockups, BSODs etc, you know where to start the troubleshooting...

 

[neovoid]

Its been running fine without no problems at all