bssunilreddy
Keymaster
Asrock B450 Steel Legend is indeed a legend like will Smith in Legend Movie but when we come to B550 mobos their pricing is of another level and in both the cases as in B450 & B550 Asrock Pro4 are legendary mobos with Rock solid bioses that does not need any more updates and their VRM cooling heatsinksare minimal but their performance is superb when we take price to performance ratio because I used B450 Steel Legend & B550 Phantom Gaming 4/ac which are rock solid both in terms of VRM cooling setup and performance when not overclocked since I never overclocked my PC until now.The Steel Legend has a different VRM arrangement. It is a 4phase VRM without doublers, and because of that it has higher temps compared to the Pro4 and K4's 3phase VRMs with doublers.
Also the temperature difference between K4 and Pro4 would probably be in margin or error but for peace of mind you can go with the K4. Your choice dude, both are the same mobo anyway.
Go with either B450 Pro4 or Steel Legend if you choose to go with B450 chipset.
Or
Go with either B550 Pro4 or Phantom Gaming 4/ac if you choose to go with B550 chipset.
Choice is yours.