Ramsey...AIMVHO, I think the 520 is a mistake, since the support of NON TPm, LEGACY systems is no the target. I know that a TPM is not the issue, but Dell equipped the D531 (nachfolger?) with a TPM, and so I guess they´ll ignore the OLD 520. The D631 is similar to the D630 except the processor which is manufactured by AMD...
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