By: Mark Roulo (, January 18, 2019 6:19 pm
Room: Moderated Discussions
Charlie ( on January 18, 2019 10:40 am wrote:
> John ( on January 18, 2019 4:52 am wrote:
> > The i9-9990XE chip has a '255W TDP'. Is that literally
> > just the max settable TDP due to being an 8-bit integer?
> You can set TDP up to 4095.75 W. Download XTU and see for yourself.

If Intel *really* wants a higher TDP, they'll have to recompile the VHDL for the chip with the TDP paths specified as 16-bit rather than 8-bit.

The 4095.75 is basically a hack where the chip re-interprets the 8-bit unsigned integer path as a weird 8-bit floating point value. This is only to support over-clockers.

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TopicPosted ByDate
255W TDP = 8-bit integer?John2019/01/18 04:52 AM
  255W TDP = 8-bit integer?Groo2019/01/18 07:52 AM
    255W TDP = 8-bit integer?Jeff S.2019/01/18 08:32 AM
  255W TDP = 8-bit integer?Charlie2019/01/18 10:40 AM
    255W TDP = 8-bit integer?dmcq2019/01/18 05:22 PM
      255W TDP = 8-bit integer?David Hess2019/02/12 09:37 AM
    Yes.Mark Roulo2019/01/18 06:19 PM
      Yes.Charlie2019/01/19 09:17 PM
        Mark probably skipped the sarcasm tags (NT)David Kanter2019/01/20 08:27 AM
          Mark probably skipped the sarcasm tags ... yesMark Roulo2019/01/20 02:32 PM
        David can you ban this asshole?Groo2019/01/20 09:47 AM
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