5 ms·

Intel treats TDP numbers as more of a vague classification than an actual indication of power consumption. "140W" is basically code for "tons of power". In PCP

• dogma1138 9y ago
  No, Intel classifies TDP as the instantaneous maximum power draw, AMD classifies it as the average maximum draw over a period of 1M.
  • sp332 9y ago
    But jsheard's link shows multiple chips using way over the listed TDP. Here's a whitepaper from Intel that explains what it means (as of 2011) [PDF] https://www.intel.com/content/dam/doc/white-paper/resources-xeon-measuring-processor-power-paper.pdf https://www.intel.com/content/dam/doc/white-paper/resources-... Thermal Design Power (TDP) should be used for processor thermal solution design targets. TDP is not the maximum power that the processor can dissipate. TDP is measured at maximum TCASE. TCASE is the temperature measured on the heat spreader over the CPU.
  • Analemma_ 9y ago
    > No, Intel classifies TDP as the instantaneous maximum power draw Are you sure about that? I can't dig up the link at the moment, but I seem to recall some hardware hacker thread where people would regularly exceed the TDP of Intel chips by running SSE/AVX-heavy workloads like Prime95, and Intel's response was basically, "That's not a real workload, it doesn't count". Which is not an unreasonable answer, but it's definitely not defining TDP as the maximum possible power draw.
  • dom0 9y ago
    > No, Intel classifies TDP as the instantaneous maximum power draw That's not correct. Both Intel's TDP and AMD's TDP are maximum-typical values, for different scenarios. Every processor can exceed it's TDP by a significant margin with some notorious applications. https://www.intel.com/content/dam/doc/white-paper/resources-xeon-measuring-processor-power-paper.pdf https://www.intel.com/content/dam/doc/white-paper/resources-...
  • loeg 9y ago
    Both go well over listed TDP running AVX instructions.