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According to CPU World regarding the FX-6350 CPU:
FD6350FRW6KHK is an OEM/tray microprocessor
FD6350FRHKBOX is a boxed microprocessor with fan and heatsink
However, my CPU has FD6350FRW6KHK
written on top of it, and yet I bought it in a (sealed) box, and it came with heatsink, cooler and even a sticker. This was in 2014. It only caught my attention today when I was switching thermal compound.
Is this to be expected, or a reason to worry?
Ask the shop you bought it from – Dave – 2017-07-07T07:34:22.253
It is completely normal. You are over thinking it... the AMD P/N FD6350FRW6KHK is for the FX-6350 CPU, the P/N FD6350FRHKBOX is a retail box multi-part set that includes a FD6350FRW6KHK CPU and fan/cooler assembly. You order FD6350FRW6KHK for the CPU by itself, or FD6350FRHKBOX for the retail box assembly. Whether you get the CPU by itself (OEM) or in a retail box, the CPU is still exactly the same. I would put this as answer, but I cannot find a reference for it although experience has taught me this is true. – acejavelin – 2017-07-07T08:06:46.187