This $5000 PC From Just Four Years Ago SUCKS — Summary & Key Points
TL;DR
Running two RTX 3090 Ti cards in SLI to match a single RTX 5090 results in worse performance, massive heat, and micro-stuttering, proving SLI is dead for gaming despite the nostalgic appeal.
Key Quotes
"So, SLI is well and truly dead."
The argument
The setup
The host attempts to build a 'future-proofing hack' using two RTX 3090 Ti cards linked via an NVLink bridge capable of 100GB per second to compete with a single RTX 5090.
The hardware reality
The dual-card setup suffers from severe micro-stuttering due to synchronization delays and runs at over 1,000 watts, reaching 90 degrees Celsius and smelling like a hair dryer.
The modern standard
The single RTX 5090 offers superior memory bandwidth with GDDR7 and a 512-bit bus, providing better performance in 3DMark (16,230 score) despite having less total VRAM than the two older cards combined.
The conclusion
Nvidia killed SLI because modern architecture and power efficiency make multi-GPU setups obsolete for gaming, though the tech survives in professional AI workstations.
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