Can this power a RTX 4090 with the included cables?

450-500 Watts ballpark on 4090 of course the manufacturer of the card is a factor due to customized bios and power delivery but if you take in your entire PC , processor, accessories 750 could be pushing it close. Personally in my rigs I tend to lean at 200 watts above needed that way my power supply is not pinned at max. Recommend looking up a units "continuous power output" as units can sometimes display max "peak" wattage . Example 500 continuous 750 peak. Manufacturers differ on small details.

Can anyone please answer is the provided 12vhpwr cable compatible with rtx 4080 fe?

It is not, but you can buy corsair compatible cables if you want, pinouts are identical, I was using this with fasgear corsair cable.

Has anyone experienced the issue of the input capacitor overheating or melting?

Suggested contact manufacturer to inquire a defective unit or recall. As a user of the unit I have had no failures or faults in two builds. Caps popping in modern PSUs is usually due to more power being drawn from the unit then it can produce. (Highly unlikely I admit) the fuse should trip first.

Does this have 3 PCI-E power outputs & cables needed for the Asus Strix RTX 3090?

The unit I received didn't work, but it has 4 of said ports, so you should be fine if you want to get it. I think the one they shipped me was damaged in shipment, I ended up returning it and getting something else entirely, non PSU.

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⚡ Elevate your rig with power that performs as hard as you do.

MODULAR MASTERY - Full modular design for a clean, customizable setup that keeps your workspace sleek and airflow optimized.
BUILT TO PROTECT - Integrated inrush current limiter safeguards your components from power surges, giving you peace of mind.
COOL UNDER PRESSURE - Adjusted Start/Stop limit at 60°C means quieter, smarter cooling that adapts to your workload.
POWER YOUR AMBITION - 850W of reliable, high-efficiency power to fuel your next-level builds without compromise.
GOLD STANDARD EFFICIENCY - Certified 80 PLUS Gold ensures up to 92.6% energy efficiency, saving power and reducing heat.

The Lian Li SP 850 is a compact SFX form factor power supply delivering 850W of stable power with 80 PLUS Gold efficiency. Featuring a full modular steel and brushed aluminum housing, it includes advanced protections like an inrush current limiter and an optimized thermal start/stop threshold at 60°C. Designed for professional-grade builds, it supports a wide input voltage range and offers quiet operation between 17.1 to 40.6 dBA, backed by a 5-year warranty.

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Brand	Lian Li
Product Dimensions	24.13 x 10.16 x 17.78 cm; 1.82 kg
Item model number	SP850 BLACK
Manufacturer	LIAN LI
Series	SP850 BLACK
Colour	Black
Form Factor	SFX
Wattage	850 watts
Item Weight	1.82 kg
Guaranteed software updates until	unknown

Lian LiSP 850 80+ Gold, Black Color, Performance SFX Form Factor Power Supply - SP850 Black

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