If you want decent batches try to get 3836Axxx, 3841A, most 38xxB batches...
I know personally that 3835A was really bad for me, and 3838B was not good either...
Check your private messages by the way
My 3844a has been one of the best I've seen for voltage and high clocks. Will do 3.6 @ 1.075v, 3.8 @ 1.145v. Temperatures are hard to keep under control though.
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