Originally Posted by AlphaC
It's very good. Better than the TI NexFET Powerblocks actually.
The ISL99227B has more thermal dissipation due to the exposure of the junction to the heatsink , plus they won electronic innovation awards in 2016. They're actually a bit better than International Rectifier IR3555. They have up to 2MHz switching frequency vs 1.5MHz on NexFETs and 1MHz on IR powerstages.
Generally speaking : Powerstage (integrated driver+high side+low side) such as ISL99227B / IR3555 > Powerblock (high+low side) such as the TI NexFET 87350 , Fairchild dual-N Powertrench, or the Sinopower > separate Powerpak / 2 Low RDS(on) mosfets for high side such as Onsemi 4C09N + 4C06N or Vishay Sira19+Sira12
Texas Instruments diagram
http://www.ti.com/lsds/ti/power-management/power-mosfet-module-overview.pageRight now it's looking like for VRM (subject to change if some boards are using 2 low side mosfets aka "doubled low side"):TOP
= Gigabyte Z370 SOC Force (unreleased, found on hwbot records
) , Gigabyte Z370 Gaming 7 due to iSL99227B (60A rating) ... top audio,top overkill VRM , ... likely Asus Z370 Maximus X Extreme tooUpper tier (LN2, custom water)
= Asrock Z370 Fatal1ty Gaming Pro i7 (whatever the full name is
, the expensive one) , Asrock Z370 Taichi , using Fairchild Dual-N (low+high side) when heatsinked properly with heatpipe (limited to about 35A per mosfet) , Asus ROG APEX (a record holder on LN2) /Formula/Hero boards using TI NexFETs (per marketing page) , MSI Z370 Godlike (until more info it goes here, but it's poor price/perf regardless
(All-in-one watercooling/dual tower air cooling)= Asrock Z370 Extreme4 / K6 using Sinopower 2-in-1 / "DSM"/ low+high sideLow Midrange , should be $160ish or less
(Asus z270-A level VRM)= Asus Z370E/F /G , Asus Z370-A , Gigabyte Z370 Gaming 5 (here or higher), MSI Z370 Pro carbon , MSI z370 M5
(sub 150W probably / 120mm fan cooler level, should be $120 or less if VRM is the only concern) = Asrock Z370 Killer SLI (cut down features is another issue on top of regular Sinopowers) , MSI z370 SLI PLUS (uPi controller + Ubiq mosfets), MSI Z370 Tomahawk (uPi controller + Ubiq mosfets ; ALC892) , MSI Z370 Krait (uPi controller + Ubiq mosfets)
Not suitable for really overclocking unless it's not an i7 (at best MCE/ multi-core turbo only) = Asus TUF Pro Gaming / z370 STRIX H, Gigabyte Z370 Ultra Gaming , Gigabyte Z370 Gaming 3 & K3, Gigabyte Z370 XP SLI, MSI Z370 Gaming Plus, etc
<4 phases , or partially Unheatsinked (don't buy) :Asus Z370-P / TUF Z370 Plus, MSI Z370-A Pro , MSI z370 PC Pro, Asrock Z370 Pro4 , Gigabyte Z370 HD3, Gigabyte Z370M D3H , etc
Oct 18,2017 Made more legible: