Ted is correct.
X-Rite upgraded the OEM version of the i1D3 to a 2000 nits peak luma capability from Jan 2017.
They just forgot to tell us!
I had a nice e-mail from X-Rite apologising for the info drop-off, and have now updated the i1D3 page of our website with the relevant info.
The only way to tell if you have a 2000 nit OEM i1D3 is the probe serial number, which has the date encoded into it.
(As Ted says, the Retail i1D3 is only capable of 1000 nits).
So, the Part Number must have the characters OEM at the end.
And the serial number will be something like OE-yy.A-02.101115.mm
Where 'yy' is the year, A-02 the hardware revision (the 2000 nit version will be RevB, this one is RevA, which is just what I had to hand as I write this...), 101115 is just an incremental number which will be different on every i1D3, and 'mm' is the month.
So, 'yy' needs to be 17, and as Jan is 01 anyway, that means 'mm' value is not really relevant.
Hope that helps.