AMD Ryzen 7 1800X and AM4 Platform Review

Written by Antony Leather

March 2, 2017 // 1:57 p.m.

Tags: #am4 #amd-ryzen-7-1800x-and-am4-platform-review #best-gaming-cpu #overclocking #ryzen #ryzen-1600x #ryzen-1700x #x370-1800x

Companies: #amd

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.

AMD Ryzen 7 1800X and AM4 Platform Review AMD Ryzen 7 1800X and AM4 Platform Review - Power Consumption

Power Consumption (Idle)

Windows 10 desktop

  • Intel Core i7-7700K
  • Intel Core i5-7600K
  • Intel Core i7-7700K (5GHz)
  • AMD Ryzen 7 1800X
  • Intel Core i5-7600K (5.1GHz)
  • AMD Ryzen 7 1800X (4GHz)
  • Intel Core i7-6850K
  • Intel Core i7-6900K
  • Intel Core i7-6850K (4.2GHz)
  • Intel Core i7-6900K (4.2GHz)
    • 50
    • 50
    • 64
    • 71
    • 73
    • 75
    • 91
    • 91
    • 121
    • 142
0
25
50
75
100
125
150
Watts (lower is better)
  • Power Consumption

Power Consumption (Load)

Prime95 small FFTs test

  • Intel Core i5-7600K
  • Intel Core i7-7700K
  • Intel Core i7-6850K
  • Intel Core i7-7700K (5GHz)
  • Intel Core i7-6900K
  • Intel Core i5-7600K (5.1GHz)
  • AMD Ryzen 7 1800X
  • Intel Core i7-6850K (4.2GHz)
  • AMD Ryzen 7 1800X (4GHz)
  • Intel Core i7-6900K (4.2GHz)
    • 113
    • 129
    • 178
    • 184
    • 187
    • 188
    • 220
    • 220
    • 253
    • 255
0
50
100
150
200
250
Watts (lower is better)
  • Power Consumption

Discuss this in the forums

QUICK COMMENT

Week in review

WEEK IN REVIEW

TOP STORIES

SUGGESTED FOR YOU