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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Lian Li SP 850 80+ Gold, Black Color, Performance SFX Form Factor Power Supply with 12VHPWR Connector, Low Noise - SP850 Black

Lian Li SP 850 80+ Gold, Black Color, Performance SFX Form Factor Power Supply with 12VHPWR Connector, Low Noise - SP850 Black

Product ID: 483710727

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Details

Model Name
SP850 BLACK
Brand
Lian Li
Compatible Devices
Gaming
Connector Type
SFX
Output Wattage
850
Form Factor
SFX

⚡80 PLUS GOLD

🔌12VHPWR Cable

🌡️60°C Limit

Description

Power Up Your Build! ⚡

COMPACT POWERHOUSE - SFX form factor fits seamlessly into your compact builds without compromising performance.
ENHANCED PROTECTION - Inrush current limiter safeguards your system from power surges.
UNMATCHED EFFICIENCY - Experience 80 PLUS GOLD efficiency for lower energy bills and a greener footprint.
FUTURE READY CONNECTIVITY - Includes a 12VHPWR connector cable for next-gen graphics compatibility.
SMART TEMPERATURE CONTROL - Stay cool under pressure with an adjusted start/stop limit of 60°C.

The Lian Li SP850 Black is a high-performance SFX power supply that boasts 80 PLUS GOLD efficiency, ensuring optimal power delivery while minimizing energy waste. With a compact design and advanced features like an inrush current limiter and a smart temperature control system, this power supply is perfect for gamers and professionals looking to enhance their systems without sacrificing space or performance.

Specifications

Brand	Lian Li
Series	SP850 BLACK
Item model number	SP850 BLACK
Item Weight	4 pounds
Product Dimensions	9.5 x 4 x 7 inches
Item Dimensions LxWxH	9.5 x 4 x 7 inches
Manufacturer	LIAN LI
ASIN	B0BCV9JCCH
Country of Origin	China
Date First Available	September 2, 2022

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