How does the RTX 5080 Gaming OC compare with the RTX 5090?

The 5080 has 10,752 CUDA cores and 16 GB of GDDR7, while the 5090 roughly doubles the core count and memory. The 5080 is the better fit for 4K gaming at high refresh rates; the 5090 is for those who need maximum VRAM and compute.

What does the dual BIOS switch do?

It selects between a Performance profile and a Silent profile. Performance favors higher clocks and fan speeds; Silent trades some of that for lower noise.

Is 16 GB of VRAM enough for 4K gaming?

Yes for current titles at 4K with ray tracing and DLSS, which is what the card targets. The heaviest texture-heavy mods and professional workloads can exceed it, where the 5090's larger pool helps.

What power supply does it need?

It is a high-wattage card, so plan on a quality 850 W or higher PSU with the appropriate 12V-2x6 connector. Check the exact requirement against your CPU and the rest of the build.

The card, a VGA support bracket and the documentation. The four-year warranty requires registering the card online.

It is a long, thick three-slot card, so check your case's GPU length and slot clearance before buying. The bundled support bracket helps with sag in large towers.