1450 MHz the clock doesn't want to go any further at all, no matter what the voltage is. 1400 MHz only badly undervoltage, until then at approx. The Radeon RX 580 can be used from approx. It is really striking to see that the following diagram offers almost coincident curves, because the real achieved performance scales almost linearly to the clock over the entire measuring range! This of course also explains why the chip then becomes much thirstier from a certain limit, but can maintain the required performance. What is fundamentally different, however, is, of course, the required power consumption. This is possible because both the Radeon RX 580 and the Radeon RX 590 also provided completely identical benchmark results at the same time (within possible measurement tolerances)! Feat, because it's almost the same chip in the end. Let's move on to the standardized benchmarkvalues that I set for each card as a 100% mark at 1200 MHz each. What is added to the Radeon RX 590 in power consumption "out of line" and thus undermines the linearity of the rise, is likely to be explained for the most part by the leakage currents at rising temperature and the then faster rotating fans On the one hand, the curve is much more relaxed and does not have a disproportionate increase towards the end. The solid curves stand for the default values for both cards, which Wattman provides us with the automatic function and the dashed curves then for what I was able to get out manually by means of subvolts.Īpart from the fact that with both cards "ordinary what's possible", you can see very clearly the improvements from Polaris 30 to Polaris 20! What the RX 590 offers with a safe and still stable undervoltage, can be seen and I will show later in a bar chart at which bar the most savings for the two cards was possible.īut what can impress, I will certainly come back to it several times later, is the much flatter ascent of the curve at the Radeon RX 590 in order to achieve the next clock increase. In the first diagram, I once compared the curves for the clock frequency-related power consumption values for you. But in the end the result counts and that is quite impressive. After a few hours, I stopped counting how many times I was subvolting towards the desktop or the Back/Greyscreen i crashed. I had already teased this follow-up in the launch article for the Radeon RX 590 and thus also promised the readers, only such a cluster of never-ending measuring series then takes a little longer than expected.
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