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GMP damaging Zen 5 CPUs?

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Re: GMP damaging Zen 5 CPUs?

#81
post #62

Most likely it's the motherboard. ASRock is getting nailed right now for unstable XMP and CPU voltages (it's recommended to undervolt a little just in case). The Asus Prime B650M motherboards they are using aren't exactly high end.

Yikes, this is the cheapest motherboard and failed Hardware Unboxed VRM tests. https://youtu.be/DTFUa60ozKY?t=744

conversely the asrocks actually did pretty good in that test...

Re: GMP damaging Zen 5 CPUs?

#82
post #56
post #54

Earlier quoted context omitted.

No, they don’t design the chip with these numbers in mind. The marketing department picks the number they want based on how they want customers to think about the chip, and which competitors they want you to compare it against. They just plug in whatever numbers are needed into the formula so that the number comes out how they want it.

>The marketing department picks the number they want based on how they want customers to think about the chip, and which competitors they want you to compare it against. They just plug in whatever numbers are needed into the formula so that the number comes out how they want it. Are you just describing product segmentation? ie. how the ryzen 5700x and 5800x are basically the same chip, down to the number of enabled c…

Yep. The 5800X is a higher bin specifically because it can clock higher than the ones in the 5700X bin. That certainly makes them draw more power, so they give them a higher TDP number too. But the TDP doesn’t have anything to do with how much power the cpu will draw or how much heat it will generate in practice. Those numbers vary quite a lot; the CPU continuously adjusts it’s own frequency multiplier based on it’s own measured temperature, meaning it’ll draw more power if you cool it better.

Re: GMP damaging Zen 5 CPUs?

#84
post #70
post #19

> The so-called TDP of the Ryzen 9950X is 170W. The used heat sinks are specified to dissipate 165W, so that seems tight. TDP numbers are completely made up. They don’t correspond to watts of heat, or of anything at all! They’re just a marketing number. You can't use them to choose the right cooling system at all. https://gamersnexus.net/guides/3525-amd-ryzen-tdp-explained-...

I have a 65W TDP CPU, and the difference in power draw (measured at the outlet) from idle to full CPU load is over 100W; it seems to just raise the clock until it hist 95C, so if I limit the CPU fan's top speed, the power draw goes down.

Yep. Modern CPUs continually adjust their clock multiplier based on what their temperature is doing, plus a few timers. If you have a better cooler then you’ll get more performance out of the same CPU, but at the cost of drawing more power and producing more heat.

Re: GMP damaging Zen 5 CPUs?

#86
Not that it makes a huge difference since they are supposed to downclock when hot, but what was the actual cooler being used? It doesn't say in the article. My guess is that it's aircooled being only 165W max, but aircooled is not recommended for most newer high end CPUs.

Re: GMP damaging Zen 5 CPUs?

#88
post #52

Earlier quoted context omitted.

AMDs desktop chips don't have distinct P and E cores, they're all P cores. AMD do have an E core design but it's currently only used in mobile and server parts.

Gotcha. Apparently Intel's marketing's gotten to me. I haven't really been keeping up with this stuff, so whenever I read about P & E cores in the past, I think I just assumed that was a thing both Intel & AMD were doing, without considering the source material too closely.

AMD has definitely been moving in that direction, and arguably doing a better job of it than Intel. But for now, AMD's desktop parts are still built with the same CPU core chiplets as their server parts, and none of the server parts are using heterogenous cores yet (from AMD or Intel). At some point AMD could theoretically build a desktop processor from one Zen chiplet and one Zen-c chiplet, but there hasn't been a good reason to do that yet.

Re: GMP damaging Zen 5 CPUs?

#89

Earlier quoted context omitted.

He's a bit sensationalist, yes, but I am thankful that he saved us from buying affected Intel CPUs.

He's a "student" and friend of late Gordon Mah Ung. He's carrying his torch forward. This was Gordon's style, and Steve is continuing it. He has the courage to hit Bloomberg offices with a cameraman, so I don't think his words ring hollow. We need that kind of in your face, no punches held back type of reporting when compared to "measured professionals".

Absolutely - this is the sort of direct citizen journalism I expect (sort of hope?) we'll see more and of as traditional investigative journalism dies its slow death.

Re: GMP damaging Zen 5 CPUs?

#90
post #19

> The so-called TDP of the Ryzen 9950X is 170W. The used heat sinks are specified to dissipate 165W, so that seems tight. TDP numbers are completely made up. They don’t correspond to watts of heat, or of anything at all! They’re just a marketing number. You can't use them to choose the right cooling system at all. https://gamersnexus.net/guides/3525-amd-ryzen-tdp-explained-...

When I see the term TDP, I remember what I have read in the "Thermal Design Document" of Intel Core2Quad Q6600 and the family it belongs: > The thermal solution bundled with the CPUs is not designed to handle the thermal output when all the cores are utilized 100%. For that kind of load, a different thermal solution is strongly recommended (paraphrased). I never used the stock cooler bundled with the processor, but w…

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