Last week the scandal with melting 12+4-pin power connectors at GeForce RTX 4090 owners began to break.It turned out that the problem could be caused by poor-quality power adapters, used by NVIDIA and some partners to assemble their cards with four 8-pin to 12+4 pin connectors.But YouTube channel Gamers Nexus was unable to confirm this hypothesis.\tAfter German resource Igor's Lab publication about substandard performance of adapters with 12VHPWR socket, Gamers Nexus YouTube channel decided to check this by examining several adapters from ASUS GeForce RTX 4090 ROG Strix, Colorful GeForce RTX 4090 Neptune OC and NVIDIA GeForce RTX 4090 Founders Edition graphics cards.And several things in the Igor's Lab investigation were called into question at once.\tFirstly, the cables on the adapter opened by the German resource have a different marking - they are designed for 150 V, whereas all Gamers Nexus adapters use cables for 300 V.Second, the soldering of cables to connectors is different: while Igor's Lab cables are soldered separately, GN cables are soldered in pairs.In the latter case, a larger contact area is provided and the connection is potentially more reliable.Gamers Nexus tested many adapters, all of which were different from what Igor's Lab demonstrated.\t\t\t\tGamers Nexus replicated several cable failure scenarios to measure connector temperatures and figure out when melting was most likely to occur.The tests were conducted with a normal power connector, a damaged connector with bad contact, as well as two missing contacts (two wires on the sides were cut and current only flowed through the center two), and finally one cut and one bad contact.The tests were done with normal frequencies and with overclocking.FurMark and other applications were used for the tests.\t\t\t\t\t\t\t\t\tAs a result, it was not possible to burn the connector.The maximum temperature to which the power connector was heated was +74.4 °C.In this case the cable with damage gets hotter than the whole one.So, in theory, this could lead to problems.But it was not possible to repeat them in laboratory conditions yet.We should add that NVIDIA itself urged all its partners, to whom consumers will return GeForce RTX 4090 with melted connectors, to send video cards to study them.
AMD will unveil Radeon RX 7000 graphics cards on the latest RDNA 3 architecture graphics processors tonight. The start of the presentation,...
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