I probably explained that wrong. I meant post-QS, pre-Retail, such as delivered to big players (like 3rd gen scalable xeons right now).some seller don't know what they sell.
that is stepping A0 (50655) not B1 (50657)
Only thing on the heatsink is "Intel Confidential" and no signs of alterations.what is the QDF ? Q??? (printed on the Heatspreader)