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GMP damaging Zen 5 CPUs?

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Re: GMP damaging Zen 5 CPUs?

#111

Post by gruez »

lazide wrote: post #104
gruez wrote: post #91

Earlier quoted context omitted.

>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. I don't get it, are you referring to the phenomenon that different workloads have different power consumption…

Apparently that’s not actually true?

Which part?

Re: GMP damaging Zen 5 CPUs?

#112

Post by dwood_dev »

mk_stjames wrote: post #28
tux3 wrote: post #7

The room temperature or precise way the paste was applied should not matter. Modern CPUs have very advanced dynamic voltage and frequency scaling (DVFS), which accounts for several sensors, including temperature. These big x86 CPUs in stock configuration can throttle down to speeds where they can function with entirely passive cooling, so even if the cooler was improperly mounted, they'd only throttle. All that to sa…

This was my first question as well- I thought it had been a long, long time since you could fry a CPU by taking away the heatsink. As in... what, AMD K6 / early Pentium 4 days was the last time I remember hearing about cpu cooler failing and frying a cpu?

Athlon era when AMD had no IHS but Intel had one. Intel also had thermal controls that AMD lacked.

I once worked on a piece of equipment that was running awful slow. The CPU was just not budging from its base clock of 700Mhz. As I was removing the stock Intel cooler, I noticed it wasn't seated fully. Once I removed it and looked I saw a perfectly clean CPU with no residue. I looked at the HSF, the original thermal paste was in pristine condition.

I remounted the HSF and it worked great. It ran 100% throttled for seven years before I touched it.

Re: GMP damaging Zen 5 CPUs?

#113

Post by o11c »

vel0city wrote: post #49
einpoklum wrote: post #44

Earlier quoted context omitted.

Wow, I can't believe how BS this TDP is! I feel like a total idiot! I've always assumed it's sorta-kinda a tight upper bound on power consumption, perhaps with some allowance for "imperfections" in the dissipation properties of the CPU, and that I shouldn't sweat the details. Couldn't this count as false/misleading advertizing though?

Its pretty insane to see someone say something like: “TDP is about thermal watts, not electrical watts. These are not the same.” Watts are watts. But yeah, TDP means nothing. If you stick plenty of cooling and run the right motherboard board revision your "TDP" can be whatever you want it to be until the thing melts.

"TDP is about average watts, not peak watts" would be an honest way of saying it.

Re: GMP damaging Zen 5 CPUs?

#114

Post by monster_truck »

All other potential causes aside, including the likely most-relevant of motherboard companies exceeding recommended defaults for power delivery: Running a cooling solution good for less than the TDP (which is NOT the max power, which tends to be about 30% higher than the TDP on these) is frankly extremely dumb. I've seen x950 processors of every generation pull at least double that on extreme workloads. I think it speaks to them being a bit clueless that they did not manually lower the thermal limits. You can cut the power and thermal limits by wild amounts and barely lose 15% multicore performance.

Re: GMP damaging Zen 5 CPUs?

#115

Post by cogman10 »

bayindirh wrote: post #71
db48x wrote: 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…

Man that was a beast of a CPU back in the day.

The Conroe Intel era was amazing for the time.

Re: GMP damaging Zen 5 CPUs?

#117

Post by vel0city »

o11c wrote: post #113
vel0city wrote: post #49

Earlier quoted context omitted.

Its pretty insane to see someone say something like: “TDP is about thermal watts, not electrical watts. These are not the same.” Watts are watts. But yeah, TDP means nothing. If you stick plenty of cooling and run the right motherboard board revision your "TDP" can be whatever you want it to be until the thing melts.

"TDP is about average watts, not peak watts" would be an honest way of saying it.

But in the end that's still not actually true in many modern desktop chips. You can take a 65W part, and with a "stock" motherboard firmware, good cooling, and the right workload end up averaging way more than 65W. Or if you have it in a hot room it just might end up using less than 65W.

TDP is more of a rough idea of how much power the manufacturer wanted to classify the part as. It ultimately only loosely relates to the actual heat or electrical usage in practice.

Re: GMP damaging Zen 5 CPUs?

#118

Post by jchw »

tpurves wrote: post #61
fxtentacle wrote: post #8

Earlier quoted context omitted.

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

Yes. When he's right, he's right. However the main issue I have with GN is how Steve tends to go full Leeroy Jenkins pitchforks and torches for 9 out of every 5 actual scandals in the tech industry.

When it comes to interpersonal drama, the "Shoot first, ask questions later" style of reporting is terrible. However, for consumer advocacy it's basically the opposite, especially because in most cases it's easy for companies to turn the narrative around by simply handling the issue well. It's almost more about how they handle it than the actual issue in many cases.

Re: GMP damaging Zen 5 CPUs?

#119

Post by userbinator »

We don't overclock or overvolt or play other teen games with our hardware.

But doesn't the hardware "overclock" and "overvolt" automatically these days?

This reminds me of the Intel CPUs with similar problems a year ago, and AFAIK it was caused by excessive voltage: https://news.ycombinator.com/item?id=41039708

Re: GMP damaging Zen 5 CPUs?

#120

Post by mrheosuper »

userbinator wrote: post #119

We don't overclock or overvolt or play other teen games with our hardware. But doesn't the hardware "overclock" and "overvolt" automatically these days? This reminds me of the Intel CPUs with similar problems a year ago, and AFAIK it was caused by excessive voltage: https://news.ycombinator.com/item?id=41039708

Also "play other teen games" should not damage your cpu.
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