GoKawiilTecLab mods RTX 5090 to run on triple 8-pin connectors, sustains 900W
YouTube modding channel TecLab rebuilt a Galax RTX 5090D HOF OC LAB XOC by removing its dual 16-pin power connectors and soldering in three 8-pin PCIe connectors directly to the power regulators, rewiring sense pins to remove power limits. Using liquid cooling, they pushed the card from 400W up to 900W, drawing over 120A and hitting clock speeds of 3,400 MHz, all through hardware changes alone with no BIOS or software tuning.
GoKawiil's interpretation of the reporting above, not reported fact.
The experiment shows that decades-old 8-pin PCIe connectors can still handle the extreme power loads of today's flagship GPUs, undercutting arguments that Nvidia's newer 16-pin connector is strictly necessary for performance. It also highlights ongoing concerns around the 16-pin standard's reliability, since older multi-connector designs may offer more headroom and safety margin for extreme overclockers.
- A modded RTX 5090 ran on three 8-pin connectors instead of dual 16-pin, hitting 900W and 3,400 MHz.
- Even a single 8-pin cable sustained 65A and 3,100 MHz, showing surprising headroom in the old standard.
- The mod was purely hardware-based, with no BIOS or software changes involved.
Corsair RM1200x Shift Power Supply — If a 900W RTX 5090 experiment makes you nervous about your own rig's headroom, a high-wattage ATX 3.x unit like the Corsair RM1200x Shift is the sane route. Its side-mounted connectors make cable routing easier, and it ships with the modern 12V-2x6/16-pin cable plus plenty of 8-pin PCIe leads for older cards.
See Corsair RM1200x Shift Power Supply on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: tomshardware.com — Kunal Khullar, 2026-09-10
Published there as: “Modded RTX 5090 ditches 16-pin power for triple 8-pin connectors — draws up to 900W and hits 3,400 MHz”
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