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De-lidded AMD Ryzen 7 5800X3D Has Vastly Improved Thermals

btarunr

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An AMD Ryzen 7 5800X3D processor that's been de-lidded (has its integrated heatspreader or IHS removed), posts vastly better thermals, according to Madness7771 on Twitter, who succeeded in de-lidding their 5800X3D. The stock 5800X3D posts significantly higher CPU core temperatures than a regular 5800X, due to its 3D Vertical Cache (3DV Cache) chiplet design, in which heat from the CPU cores is conducted through structural silicon, to the surface of the die-stack, from where the STIM conducts heat onward to the IHS.

A de-lidded 5800X3D reveals the 8-core "Zen 3" 3DV chiplet (CCD) next to a blob of structural material in the vacant area meant for a second CCD. With the residual STIM cleaned off, Madness7771 used a Conductonaut TIM and a Noctua NH-D14 to cool the processor. Madness7771 also posted some before and after temperature numbers for the processor (using the same cooler). It sees a maximum temperature drop from 80 °C to 70 °C, and average temperature drop from 78 °C to 67 °C, tested with a Forza Horizon 5 gaming workload. They also note that the peak temperature of the 5800X3D no longer reaches over 90 °C. De-lidding processors with STIM is a very risky process, and will destroy your processor if not done right.



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Can't we get special edition CPUs without IHS even without warranty, pretty cooler manufacturers or some other third party would make adapters to make sure you won't destroy the CPU.
 

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CPU power also got lower, despite higher clocks. I think the temps are not only a result of delidding, but maybe a slight undervolt too.
 
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CPU power also got lower, despite higher clocks. I think the temps are not only a result of delidding, but maybe a slight undervolt too.
The cooler the CPU, the less power it consumes for the same load. 10C less is enough to reduce the power consumption with ~5%.
 
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It just goes to show how poor and terrible work is done by AMD in the manufacturing facilities. AMD's managers must be expelled from their work places and replaced by someone who knows what they are doing. :banghead:
Sarcasm or :kookoo:?
 

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Well, for example that there is almost zero personnel on the manufacturing floors in the plants. Very few things are done by hand.

Ok, but someone makes the decision to use "residual STIM" instead of "Conductonaut TIM and a Noctua NH-D14", which is a wrong solution as we can see from the thermal consequences.
 
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15% is quite a good improvement.
Please note that you use Kelvin if you want to express the difference in temperature and that would be ~3% difference
 
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Ok, but someone makes the decision to use "residual STIM" instead of "Conductonaut TIM and a Noctua NH-D14", which is a wrong solution as we can see from the thermal consequences.
Yes, this I can agree with. Sadly, it is business as usual, although I didn't expect that from AMD.
 
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A premium and hot product should be treated accordingly with premium level cooling solutions ;)

Exactly why i use a custom loop. Build a $2000 PC with high end parts, buy a $100 CPU cooling solution :laugh: My loop cost about £600 but so what when it looks good and does a very good job at cooling both my CPU and GPU.
 
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Please note, that you use Kelvin if you want to express the difference in temperature and that would be ~3% difference
Well could be true in a remote corner of space, but what matter is the delta from the ambient temperature as powering it off doesn't bring the cpu back to 0 Kelvin.

So if the ambient was 20° C, it would mean 19% decrease in temp, that is significant.

Doesn't change that heat spreader are there for a reason and they probably even more important with multichip die, (and even more now with 3d stacking).
 
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@madness777
Congrats on making the headlines! :D
I must admit it takes balls to delid an expensive soldered SKU such as this one. I wouldn't risk damaging the die myself. But I'm really curious about your temperatures.

Did you test Forza Horizon 5 in the benchmark or actual gameplay? I find it hard to believe you got the 5800X3D to 80c before the delid with an NH-D15. In my own testing it never exceeded 61c in the benchmark - which is assumed to be more demanding than the game itself. I'm talking full stock CPU with an Assassin III in a 25c room:

fh5.jpg
 
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10% not worth the risk in my view but nice to see whats under the lid.
 
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@madness777
Congrats on making the headlines! :D
I must admit it takes balls to delid an expensive soldered SKU such as this one. I wouldn't risk damaging the die myself. But I'm really curious about your temperatures.

Did you test Forza Horizon 5 in the benchmark or actual gameplay? I find it hard to believe you got the 5800X3D to 80c before the delid with an NH-D15. In my own testing it never exceeded 61c in the benchmark - which is assumed to be more demanding than the game itself. I'm talking full stock CPU with an Assassin III in a 25c room:

View attachment 252625
I'm doing gameplay benchmarks, exact same track for 60 seconds. I'm using a 1080Ti HOF so it can get a bit toasty in the case especially now when it's 34°C outside
My sample was very hot from the start when I was benchmarking it under custom watercooling on open bench, for example linpackXtreme was pinned against 90°C tjmax and downclocking
Once I put it in the daily with the NH-D14 it was constantly hitting 90°C while opening firefox and games... linpack was downclocking to 3.7GHz and reducing TDP from the usual 135W to around 95W so I was getting pretty tired of it.
After delid and applying Conductonaut it hasn't hit anywhere close to 90°C in games, linpack still pushes it to 90°C but the CPU is doing around 4.1-4.2GHz scoring pretty much the same when it was watercooled, around 310Gflops. I haven't done tests with watercooling after delid but I'd assume it's much better as well. Sidenote I'm using Kryonaut for all my tests.
To be honest I wasn't expecting such a big difference but here it is :D
 
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