CalculatorsUSB Hub Power for a Sim Rig

USB Hub Power for a Sim Rig

Direct-drive bases usually have their own power brick, so the USB side is the small devices: pedals, shifter, handbrake, button box and a stream deck. Those still trip an unpowered port when they share it.

Inputs

Wheelbase USB (W)Pedals (W)Shifter (W)Handbrake (W)Button box (W)Stream deck or dash (W)Other USB (W)

Results

Total USB draw: 15.0 W
Hub budget: 22.5 W
Powered hub: Yes

Related gear

Powered USB hub
A mains-powered hub keeps the deck and the pedals from browning out a motherboard port.
$30–$80

How the number is made

Total watts is the sum of the seven fields. A bus-powered USB 3 port is treated as 4.5 W. Above that, the powered flag is yes and the hub budget is 1.5 times the total, to leave room for inrush.

Type the USB draw, not the wheelbase motor wattage. A base with a mains brick often sits near 1–3 W on the data port. A stream deck is the line that usually forces a powered hub.

What still needs its own brick

A motion platform, a bass shaker amp and a high-watt wheelbase do not belong in this sum. They want mains power, not a USB budget.

Related calculators

GPU vs VR Headset Bottleneck
A Link headset adds another device that may sit on the same hub as the deck.
Wheelbase and Wheel Quick Release
Some wheels still need a USB lead even after the quick release clicks in.

Questions

Should I include the wheelbase PSU?

No. If the base has a wall brick, enter only what the USB plug draws. Motor watts do not pass through the hub.

Why 1.5 times the sum?

Devices spike when they enumerate. A hub rated only for the steady sum drops pedals on boot.

Is 4.5 W a USB 2 or USB 3 limit?

It is the usual USB 3 bus-power budget used here as the line between an unpowered port and a powered hub.

Disclaimer — no professional advice, no liability

These calculators are simplified estimates for planning a sim rig. They are not a structural sign-off, a wheelbase torque limit, or a guarantee that a quick release, profile or headset will fit. Check the hardware before you cut aluminium or bolt a base down.

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