Ryzen 5/7 as a Xeon E3 Competitor?

alucasa

New Member
May 23, 2017
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I dislike how AMD lies about their TDP.

AMD CPU TDP is based on average load while Intel's TDP is max load.

So, when AMD CPU says 65w TDP, it is effectively 95w TDP.
 

Evan

Well-Known Member
Jan 6, 2016
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I dislike how AMD lies about their TDP.

AMD CPU TDP is based on average load while Intel's TDP is max load.

So, when AMD CPU says 65w TDP, it is effectively 95w TDP.
So AMD TDP is more like Intel SDP :)

On the topic of TDP I am surprised how high the low core count parts are these days, certainly ghz plays a huge role in TDP.
 

alucasa

New Member
May 23, 2017
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High clock frequency is what determines TDP, not the core count.

For an example, Intel has E5-2630L CPU. V4 has 10 cores and 20 threads @ misery 1.8ghz but runs at 55w TDP.

And there is E3-1235L v5, 4 cores (no HT) @ 2ghz and 25w TDP.
 

Nanotech

Active Member
Aug 1, 2016
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I dislike how AMD lies about their TDP.

AMD CPU TDP is based on average load while Intel's TDP is max load.

So, when AMD CPU says 65w TDP, it is effectively 95w TDP.
Not necessarily true that a 65W TDP processor is 95W TDP. See below even though the R7 1700 is rated at 65W TDP under a Prime95 torture test it's only 16.9W over. Look at Intel's Broadwell-E lineup. They rate it for 140W TDP and the 6900K is 148.1W under Prime95.



If we were to take an average load then AMD's tdp is actually much lower:

 
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alucasa

New Member
May 23, 2017
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That's still huge though.

For 65w part to go over 17w is about 25% over. This much can't even be called margin of error.

For 140w part to go over 8w is about 6%.
 

Nanotech

Active Member
Aug 1, 2016
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That's still huge though.

For 65w part to go over 17w is about 25% over. This much can't even be called margin of error.

For 140w part to go over 8w is about 6%.
That's under maximum load. You said and I will quote:

I dislike how AMD lies about their TDP.

AMD CPU TDP is based on average load while Intel's TDP is max load.
So under an average load which is most consumers run the processors at the Ryzen processors are more efficient than a similar 14nm Broadwell-E processor even on 14nm. They are all coming under 65W even when overclocked on an average load.
 

alucasa

New Member
May 23, 2017
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Not sure how you are coming to that conclusion.

And I am mostly concerned about maximum load since rendering uses all available resources which is my main task.
 

spfoo

Member
May 23, 2017
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Not sure how you are coming to that conclusion.

And I am mostly concerned about maximum load since rendering uses all available resources which is my main task.
Well I've been running an 8 AMD CPU C6105 for a couple of weeks at very close to maximum load 24/7. TDP of the 4332 HE CPU is 65W. 65W x 8 = 520W. My UPS displays the power consumption of the server at 585W. If what you say would have any fact base in my case I should be looking at over 1 kW instead of 585W...
 

alucasa

New Member
May 23, 2017
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They are server chips. AMD or anyone wouldn't dare lying TDP on industrial chips.
 

sfbayzfs

Active Member
May 6, 2015
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SF Bay area
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