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The site quotes "40 watts lower power draw" as a reason to prefer the AMD CPU, but what they're actually comparing is TDP, Thermal Design Power. The TDP for Ryz
by sorenjan 7y ago
The site quotes "40 watts lower power draw" as a reason to prefer the AMD CPU, but what they're actually comparing is TDP, Thermal Design Power. The TDP for Ryzen 3900X is noted as 125W, but it's actually 105W. According to Anandtech, the power threshold that is allowed to be delivered to the socket for 105W TDP CPUs is 142W.
The 3900X probably does use less power than the i9 9980XE, but TDP is not power usage.
https://www.anandtech.com/show/14605/the-and-ryzen-3700x-3900x-review-raising-the-bar/19 https://www.anandtech.com/show/14605/the-and-ryzen-3700x-390...
- madrix999 7y agoBut intel calculates their TDP at base clocks while AMD calculates theirs at boost clocks, so AMD definitely definitely has a better wattage per performance
- jdietrich 7y agoAccording to tests by Tom's Hardware, the i9-9980XE draws 199w under full synthetic load and 245w in an AVX stress test at stock clocks. A comparison of TDP understates the efficiency advantage of the Ryzen chip. https://www.tomshardware.com/reviews/intel-core-i9-9980xe-cpu,5902-2.html https://www.tomshardware.com/reviews/intel-core-i9-9980xe-cp...
- zamadatix 7y agoI don't know it understates the efficiency as much as it simply understates the max draws in general. 3900x Tom's Hardware review for reference: https://www.tomshardware.com/reviews/ryzen-9-3900x-7-3700x-review,6214-3.html https://www.tomshardware.com/reviews/ryzen-9-3900x-7-3700x-r... Difference of about ~57 watts (142 vs 199) in the non AVX.
- tigershark 7y agoNow I’m not following the cpu market anymore, but for as long as I remember (before y2k) AMD was always much more conservative than intel regarding the TDP. I don’t know if it’s possible that in the last 10 years or so things changed drastically though.