Sunday, June 26th 2022
De-lidded AMD Ryzen 7 5800X3D Has Vastly Improved Thermals
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.
Sources:
Madness7771 (Twitter), VideoCardz
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.
42 Comments on De-lidded AMD Ryzen 7 5800X3D Has Vastly Improved Thermals
Definitely a modders chip
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).
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:
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
90C under custom WC while opening Firefox? LMAO! That's intel territory BS right there!
Edit: a few :D :D :D before someone starts calling 'fanboy' or 'trolling'.