AMD Radeon RX 7900 ‘flipping’ suggests reference playing cards may have situation with vapor chamber design
Der8auer released a complete overview of Radeon RX 7900 hot place temperature problem. He procured four cards to verify the most frequently stated problems, these as a big difference in between horizontal and vertical installations of the GPUs.
As it turns out, there is indeed a big difference. As for each the movie, with just about every card examined in a 10 moment burn-in examination, GPUs will reach greater sizzling place temperatures when installed vertically. But this is not the whole tale.
In horizontal set up A and B cards will start out to throttle in just 1 moment right after commencing the exam. A quick comparison has demonstrated that Radeon RX 7900 GPU examined ended up running hotter in horizontal set up than in vertical. These playing cards ended up managing at ‘well above’ 2000 RPM as opposed to 1700-1800 RPM in vertical manner.
Der8auer made a distinctive stand to validate if the cooler bodyweight and gravity may be the reason higher temperatures are observed in horizontal manner. This examination has proven very similar final results in comparison to absence of a support for the cooler, which usually means that it is not an problem.
In the same way, soon after getting the cooler apart and taking away the assist bracket which has direct contact with VRM did not improve the temperature. The YouTuber speculated that the stand offs top may have developed a small hole and as a end result impact cooler effectiveness, but this alternatively very simple take a look at has verified that this not an concern. He even went as far as to grind the stands on the most important cooler element to decrease the gap amongst the GPU and the cooler, but this did not clear up the problem both.
Yet another concept was a vapor chamber trouble. Though a single of the tested cards was nevertheless running Furmark der8auer rotated the whole examination bench to see that the temperature has enhanced significantly. Even flipping the card yet again did not provide the reduced temperature back again. The identical difficulty was noticed with both modified and untouched RX 7900 reference playing cards.
This led der8auer with only a single probable explanation, a design challenge with the vapor chamber. Even though it is not intended to be rotated, it implies that the liquid within the chamber may possibly have complications circulating back again immediately after condensing (a vapor chamber is basically a huge heatpipe). He promises that this could be a design situation or the content selection trouble, but he is fairly absolutely sure that this is a vapor chamber issue.
AMD not too long ago printed a quick assertion that encourages folks with the thermal throttling to get hold of their support:
“We are aware that a minimal selection of end users are encountering surprising thermal throttling on AMD Radeon RX 7900 XTX graphics playing cards (reference versions produced by AMD). End users encountering unanticipated thermal throttling of an AMD Radeon RX 7900 XTX must contact AMD Support.”
But as Der8auer states, this concern now impacts a lot of users, and if vapor chamber is genuinely the difficulty, then this may drive AMD to get a lot serious motion.
[der8auer EN] I was Erroneous – AMD is in Significant Issues (11,762 sights)