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The preferred combination for CPU + motherboard?

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thanks bro. I checked HERE And I dug a little deeper, look what I found. Publishing it for anyone who is undecided, may help him. The relevant models in the country, are arranged according to some real phases in VRM. The price in shekels on the right:


  • MSI B550M-PRO-VDH-WIFI - 6 True, 4 + 2 - 690
  • MSI MAG B550M BAZOOKA - 6 True, 4 + 2 - 742
  • ASRock B450M-Pro4 - 6 True (9 Virtual), 3 (x2) +3 - 338
  • ASUS TUF-GAMING-B550M-PLUS - 6 True, 4 (x2) +2 - 652
  • MSI MPG Gaming Plus - 7 True (12 Virtual), 5 + 5 + 2 - 810
  • Gigabyte B550M S2H - 8 True, 5 + 3 - 386
  • Gigabyte B550M DS3H - 8 True, 5 + 3 - 461
  • Gigabyte B550M PRO - 8 True (13 Virtual), 5 (+5) +3 - 574
  • Gigabyte GAMING X - 8 True (13 Virtual), 5 (+5) +3 - 649
  • Gigabyte B550 Elite - 8 True (14 Virtual), 6 (+6) +2 - 708


The funniest thing is that all the gigabytes (except the last one) and MSI use the same main components exactly (By ONSemi).


By the way someone wrote to me that ribs Especially for beauty:


"Technically speaking, there is nothing wrong with a plain four phases VRM either: the CPU draws around 80A peak, divided between four phases, that's 20A average, and with FETs that have 4mOhm Rdson, that's 1.6W worth of loss per phase. If you use two pairs of FETs per channel, average current through each pair drops to 10A, allowing you to use cheaper FETs with 6mOhm Rdson while still reducing power dissipation to 0.6W per pair (1.2W per phase when driving two pairs per phase output) and making the VRM 1.6W (0.4W per phase, x4) easier to cool. Those VRM heatsinks are mostly decorative: they are clamped on top of the VRM's plastic / epoxy encapsulation. Most of the real VRM heatsinking is provided by the motherboard's power and ground planes. "


S2H seems to be the best deal, or the B550M Pro If you need a little power the virtual phases give:


VRM doublers work by distributing the power amongst the two lanes of MOSFETs, chokes and capacitors available to each of them. Usually, the PWM controller sees every two lanes controlled by a doubler as one. This allows PWN controllers with support for up to 6 phase VRMs to be used in 12 phase VRM designs using doublers. While still better than regular six-phase parts, they're not as efficient as, say true eight or 10-phase VRMs. They induce a delay and reduce the frequency of the supplied current in half. Furthermore, only one of the two can be switched on at a time. The first one sees a modest delay but the second one is usually delayed by half a cycle, and in terms of precision, even the former is rather substantial. While multi-phase VRMs kick in instantly, or one after the other without a notable delay in between, pseudo-phases or doublers induce a latency which reduces the overall efficiency. Again, a 5 phase VRM doubled to 10 is less efficient than a native 7 phase or eight-phase VRM. The reason as already explained is that the doublers induce a small delay to the PWM signals. Regardless, a 10 phase (doubled) VRM is still better than a 5 phase and is a cheap trick to allow a higher power draw.

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