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Beefier VRMs on the mainstream Intel platform has been more of a marketing feature than anything for the last couple generations since the chips are so power efficient. With the power draw of OCed Skylake-X it matters though, and the X299E-ITX/ac has such limited space for the VRM section that I doubt it will OC as well as anything other than the cheapest X299 ATX boards.That said, if it's a proper SFF case you very well may run into thermal limits for a heavy OC before VRM limits.In an dual-row 8-circuit wire-to-board configuration it's rated for 10A on 16 AWG wire and 8.5A on 18 AWG, at a maximum temperature delta of 30°C over ambient. http://www.molex.com/pdm_docs/ps/PS-45750-001.pdf (page 6)Which works out to 480W and 408W respectively. So there's not quite as much leeway but should still be plenty, short of LN2 overclocking.
Beefier VRMs on the mainstream Intel platform has been more of a marketing feature than anything for the last couple generations since the chips are so power efficient. With the power draw of OCed Skylake-X it matters though, and the X299E-ITX/ac has such limited space for the VRM section that I doubt it will OC as well as anything other than the cheapest X299 ATX boards.
That said, if it's a proper SFF case you very well may run into thermal limits for a heavy OC before VRM limits.
In an dual-row 8-circuit wire-to-board configuration it's rated for 10A on 16 AWG wire and 8.5A on 18 AWG, at a maximum temperature delta of 30°C over ambient. http://www.molex.com/pdm_docs/ps/PS-45750-001.pdf (page 6)
Which works out to 480W and 408W respectively. So there's not quite as much leeway but should still be plenty, short of LN2 overclocking.
