News for hackers. Stuff that matters.

A comment on Intel Core I9 9980XE vs. Ryzen 9 3900X Benchmark.

Re:Intel Core I9 9980XE vs. Ryzen 9 3900X Benchmark by sorenjan on Sunday July 14, 2019 @05:04PM (#20436012)
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-390...

[ Parent | on HN ]
Re:Intel Core I9 9980XE vs. Ryzen 9 3900X Benchmark by jdietrich on Sunday July 14, 2019 @05:25PM (#20436153)
According 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-cp...

[ Parent | on HN ]
Re:Intel Core I9 9980XE vs. Ryzen 9 3900X Benchmark by zamadatix on Sunday July 14, 2019 @05:40PM (#20436279)
I 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-r...

Difference of about ~57 watts (142 vs 199) in the non AVX.

[ Parent | on HN ]
Re:Intel Core I9 9980XE vs. Ryzen 9 3900X Benchmark by madrix999 on Sunday July 14, 2019 @05:22PM (#20436129)
But intel calculates their TDP at base clocks while AMD calculates theirs at boost clocks, so AMD definitely definitely has a better wattage per performance
[ Parent | on HN ]
Re:Intel Core I9 9980XE vs. Ryzen 9 3900X Benchmark by tigershark on Sunday July 14, 2019 @05:50PM (#20436346)
Now 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.
[ Parent | on HN ]