The idea of testing the Ryzen Threadripper 3960X processor in conditions of direct contact of the sole of the water block with its crystals, the German enthusiast Roman Hartung (Der8auer) caught fire in December last year, but only recently published a video with final conclusions that only confirm the meaninglessness of such manipulations.
Recall that the logic of removing a standard heat-distributor cover from the processor is based on reducing the number of links in the heat transfer chain. Some processor manufacturers tend to save on the characteristics of the standard thermal interface, so in some cases, enthusiasts look under the cover to replace it. The Ryzen Threadripper family uses solder to provide reliable bonding between the processor crystals and the heat transfer cap.
Roman removed the cover from the Ryzen Threadripper processor back in December, at the same time he modified the processor socket of the motherboard, since the standard mounting frame prevented the installation of a water block due to a decrease in the mounting height of the processor. The water block fastening system for the new size was also not ready, since the clamping force decreased, therefore, in the continuation of the experiment, Roman Hartung made four expansion washers, which were laid under the water block fastening screws. The required clamping force has been restored.
Next, it was necessary to eliminate the likelihood of a skew of the water block on the processor, since the area of the supporting surfaces after removing the cover decreased. Der8auer solved the problem by applying narrow strips of thermal pad 1 mm thick along the perimeter of the processor substrate. This cannot be said that this completely eliminated bias, since in order to achieve equal core temperatures on each of the four crystals, the author had to reinstall the water block more than a dozen times and re-apply the “liquid metal” type thermal interface. Along the way, Roman was convinced that all five processor crystals were the same in height, having equal conditions for contact with the sole of the water block.
When a precarious balance was reached and liquid was charged into the cooling system, the “scalped” Ryzen Threadripper 3960X processor was tested in the Cinebench R15, but the temperature of individual cores under load dangerously approached the limit after which thermal protection is triggered. Once again, Roman was convinced that there wasn’t much point in removing the lid from the processor.
An enthusiast turned up at his fingertips with a suitable sized evaporation chamber, which he decided to use instead of the regular processor cover. Placing it between the Ryzen Threadripper 3960X crystals and the sole of the water block after applying “liquid metal” on both sides, Der8auer performed another test measurement. In the Cinebench R15, the temperatures have become slightly lower, but in this sense, the evaporation chamber is no better than the standard heat-distributor cover. The conclusion was simple – they are not looking for good from good, it is better not to remove the cover of Ryzen Threadripper processors when trying to improve the heat sink. All such manipulations lead to a loss of warranty on the processor, not to mention the risk of damage to it due to inept user actions.
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