Many people used thermal paste (Kryonaut) between chipset and heatsink and temperatures improvement was significant (+/- 15ºC) as mentioned above, but I don't know what happens with the guarantee.
If it helps for comparison purposes, in my Aorus Xtreme the x570 chispet uses to be between 45ºC and 52ºC with case fans spinning at 700 rpm when gaming, so I guess the chipset should not be difficult to maintain with good temperatures.
Gigabyte X570 Aorus Xtreme
EVGA RTX 2080 Ti XC Ultra
G.Skill 32 GB (2x16) 3200CL14 @ 3800CL16
Corsair MP600 1TB m.2 SSD
Seasonic 850w Prime Ultra Titanium
Dell Alienware AW3418DW
Corsair K63 Wireless
Logitech G900 Chaos Spectrum
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