Advanced Micro Devices, the American multinational semiconductor company based in California, has recently launched their RX 480 graphics cards with AMD LiquidVR technology as well as Polaris Architecture in order to provide immersive and rich virtual reality experiences with advanced capabilities and compatibility. In engineered setups used to test the precise power offered from the video card itself, a couple of reviewers, specifically Tom’s Hardware and PC Perspective, found that the RX 480 slightly exceeds its target TDP. The card itself may also exceed the limits of the PCI Express specification.
“The RX 480, like most Graphics Cards, pulls power from two different places. The first is through its own PCIe slot, which the PCIe specification rate at up to 75 watts. Some cards use less power than that, and don’t require any additional connections,” explained Brad Bourque from Digital Trends. “The RX 480 has a 150 watt total TDP, so it should theoretically pull the other 75 watts from its six-pin PCIe power connection. Both of those connections are specified for a maximum of 75 watts. Yet, in certain situations, the card’s power draw can exceed 150 watts — and thus the limits of one or both power connections.”
While playing Metro: Last Light in 4K, both Tom’s Hardware and PC Perspective found power readings which reached 160 watts from the power supply. Both reviewers discovered consistent power draw over 150 watts and reported peaks of 200 watts.
“One vendor told me directly that while spikes as high as 95 watts of power draw through the PCIE connection are tolerated without issue, sustained power draw at that kind of level would likely cause damage,” said the owner of PC Perspective, Ryan Shrout.“We have extensive testing internally on our PCIE compliance and RX480 passed our testing. However we have received feedback from some of the reviewers on high current observed on PCIe in some cases, said Raja Koduri from Radeon. “We are looking into these scenarios as we speak to reproduce these scenarios internally. Our engineering team is fully engaged.”
At this moment, there has been no reports of a RX 480 frying a motherboard. Even if the RX 480 does technically exceed specifications under certain loads, it is very unlikely to harm your motherboard at stock clock speeds.
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