Intel Core i9-7900X (Skylake-X) Review

Written by bit-tech Staff

June 16, 2017 | 15:58

Tags: #skylake-x #x299

Companies: #intel

Power Consumption

For all of the overclocked performance tests, we disable all power-saving technology in order to give us a consistent set of results, and also best-case performance numbers - even though technologies such as Intel's SpeedStep might only take microseconds to kick in, that can make a difference in some tests.

However, for the stock speed results and power consumption tests, we re-enable everything in order to get a real-world power draw. The power draw is measured via a power meter at the wall, so the numbers below are of total system power draw from the mains, not the power consumption of a CPU itself. Measuring the power draw of any individual component in a PC is tricky to impossible to achieve.

We use Prime95's small FFTs test to put the CPU under 100 percent load, while idle power results are taken with the PC sitting at a Windows Aero-enabled desktop.

Intel Core i9-7900X (Skylake-X) Review Intel Core i9-7900X Review - Power Consumption

Power Consumption (Idle)

Windows 10 desktop

  • AMD Ryzen 7 1800X
  • AMD Ryzen 7 1800X (4GHz)
  • Intel Core i9-7900X
  • Intel Core i7-6950X
  • Intel Core i9-7900X (4.6GHz)
  • Intel Core i7-6950X (4.4GHz)
    • 52
    • 64
    • 70
    • 78
    • 88
    • 138
0
25
50
75
100
125
150
Watts (lower is better)
  • Power Consumption

Power Consumption (Load)

Prime95 small FFTs test

  • AMD Ryzen 7 1800X
  • Intel Core i7-6950X
  • AMD Ryzen 7 1800X (4GHz)
  • Intel Core i9-7900X
  • Intel Core i7-6950X (4.4GHz)
  • Intel Core i9-7900X (4.6GHz)
    • 168
    • 195
    • 259
    • 267
    • 368
    • 378
0
100
200
300
400
Watts (lower is better)
  • Power Consumption

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