As copied from the main Haswell thread I will post it again here so customers are aware of this. 
Update from OcUK
First of all I would like to apologise to all those who received these processors in this state, they were not intended to be sent out to our customers, as these were to be used in our system builds, there has been a mix up in our warehouse.
There is nothing wrong with the processors, and they are purely just mixed with the normal OEM which means some customers may have accidentally received these by mistake.
We have tested a number of OEM CPUs before launch for use in system integration to ensure that our overclocks are commercially viable. This is a method that has happened here since the launch of Bloomfield. Batch testing means that we have a range of overclock frequencies to offer customers looking to buy full systems and overclocked bundles.
This testing procedure takes place separately to free stock. Sadly in this instance, the tested stock has been picked rather than standard free stock. Please remember that this is the first CPU launch that has occurred since the move to our new warehouse premises.
If you do have these used marks on your processor:
Then feel free to contact us in the Customer Service forum with your order number, we have been informed this morning and have been trying to contact as many customers as we can, however it is hard for us to know who would have received a processor in this state. So please contact us and we can get the processor replaced. And as a gesture of good will, we will replace the OEM processor you originally purchased for a RETAIL version of the processor which will cost you no extra.
Please understand that you will need to send the OEM processor back to us first, and we can send out the RETAIL version to you.
Thank you for your understanding.
Update from OcUK
First of all I would like to apologise to all those who received these processors in this state, they were not intended to be sent out to our customers, as these were to be used in our system builds, there has been a mix up in our warehouse.
There is nothing wrong with the processors, and they are purely just mixed with the normal OEM which means some customers may have accidentally received these by mistake.
We have tested a number of OEM CPUs before launch for use in system integration to ensure that our overclocks are commercially viable. This is a method that has happened here since the launch of Bloomfield. Batch testing means that we have a range of overclock frequencies to offer customers looking to buy full systems and overclocked bundles.
This testing procedure takes place separately to free stock. Sadly in this instance, the tested stock has been picked rather than standard free stock. Please remember that this is the first CPU launch that has occurred since the move to our new warehouse premises.
If you do have these used marks on your processor:
Then feel free to contact us in the Customer Service forum with your order number, we have been informed this morning and have been trying to contact as many customers as we can, however it is hard for us to know who would have received a processor in this state. So please contact us and we can get the processor replaced. And as a gesture of good will, we will replace the OEM processor you originally purchased for a RETAIL version of the processor which will cost you no extra.
Please understand that you will need to send the OEM processor back to us first, and we can send out the RETAIL version to you.
Thank you for your understanding.
