I purchased this card to replace my reference 5700XT and, while it is a good card in many respects, it suffers from the same technical flaw as my original Sapphire RX480 Nitro+. The heat sink is simply not large enough to passively maintain a fixed low GPU temp under desktop conditions, which makes the fans come on periodically. Under desktop conditions the GPU temps steadily climbs up to 59degC and then the fans come on until the temp drops down to 49degC at which point the fans stop. Then the cycle constantly repeats: the GPU temp steadily climbs back up to 59degC and the fans come back on and then off once it reaches 49degC again. As mentioned this is just using desktop applications such as Word/Outlook or browsing etc which, according to Sapphire's claim, should see no fans coming on. The time it takes between fan off to fan on is approx. every 3.5 minutes. This fan on/off cycling is really annoying - its actually more annoying than the constant low level fan noise of eh reference card - and makes Sapphire's the 'fan stop at idle' claim misleading. Please note that I am currently using the card's quiet BIOS and have an HP 1440p monitor with a fixed 75Hz refresh rate. I have also tried lowering my monitor to a 60Hz refresh, but the card exhibits the same fan on/off cycling. GRRRR. I have captured the cycling using GPU-Z (refer attached). You can see the fans coming on and going off again, but the GPU (load and clock data) is pretty much doing nothing. My Sapphire VEGA 64 Nitro+ was able to stay cool enough under all desktop conditions that the fans never came on. I think Sapphire should have used the exact same heat sink for the RX 5700 XT. Unfortunately, this fan cycling in the desktop has spoilt my enjoyment of this card quite a bit.
