Amd radeon rx 480 overload pci slot
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The Radeon RX 480 has arrived offering an excellent relationship between price and performance, the new Polaris card intends to become a best seller, although not all is good news. Having a single 6-pin power connector forces the card into the PCI-Express port on the motherboard, drawing more electrical power than is recommended.
AMD Radeon RX 480 excessively forces the electrical power of the PCI-Express slot
The new Radeon RX 480 presents a single 6-pin connector that is capable of offering up to 75W of power, in addition to the 75W that the PCI-Express slot can provide, so we have a total of 150W, a figure that coincides with the TDP of the card. The problem comes in that the card shows peaks of maximum consumption slightly higher than those 150W, this situation causes the card to force the PCI-Express slot extracting more power at those 75W and this can create restart problems in the computer and in more cases serious damage to the motherboard itself.
Tom's Hardware has made a fine analysis of the consumption of the Radeon RX 480 and they have obtained maximum peaks of 164W, so the card is forced to extract 86W from the PCI-Express slot, remember that the maximum is 75W and most the cards do not exceed 66W for security reasons. These consumption peaks are very brief, so the system will not experience damage in the short term, but if it is something to take into account in the long term, prevention is better than cure.
Other means such as PC Perspective go even further by targeting maximum consumption of 180W, so the problem would be even greater, especially for users who decide to overclock their card. In this situation , low-end motherboards are the most vulnerable, since they have lower quality components and can be more easily damaged.
AMD is aware of the problem and is already working, surely an update of the BIOS of the card will solve the problem although many users will not know how to flash the new BIOS and it remains to be seen if the solution is to lower the performance of the card, because You cannot extract more power than is available.
Our recommendation is to wait for the custom versions of the Radeon RX 480 that will have a more robust power system.
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