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Graphics Cards comparison

Gigabyte RTX 5080 vs ZOTAC RTX 5090

Specs, platform, power, size and UK prices side by side. Every value comes from the product listing; anything we don't hold is marked unknown.

Gigabyte AORUS NVIDIA GeForce RTX 5080 XTREME WATERFORCE WB 16GB Graphics Card
Gigabyte
Gigabyte RTX 5080
£1792.63at eBay UK
Checked 16 Mar 2026. Confirm at the retailer.
View at eBay
ZOTAC NVIDIA GeForce RTX 5090 SOLID OC 32GB Blackwell Graphics Card
ZOTAC
ZOTAC RTX 5090
£3699.00at eBay UK
Checked 16 Mar 2026. Confirm at the retailer.
View at eBay

Key differences

  • Different graphics chips: RTX 5080 against RTX 5090.
  • The ZOTAC RTX 5090 has 32 GB of video memory against 16 GB. More video memory helps at higher resolutions and texture settings.
  • The ZOTAC RTX 5090 is 122 mm longer (329.7 mm). Check your case's graphics card clearance.
  • The ZOTAC RTX 5090's maker recommends at least a 1000 W power supply, against 850 W for the Gigabyte RTX 5080.
  • The Gigabyte RTX 5080 is £1906.37 cheaper at its lowest listed new price (£1792.63 against £3699.00).

Performance

We don't have measured benchmark results for these parts yet, and we don't publish estimated scores. Specs like core count, clock speed and video memory are a guide, not a measure of speed in games or apps.

Specifications

SpecificationGigabyte RTX 5080ZOTAC RTX 5090
Graphics chip
Graphics chipRTX 5080RTX 5090
Memory
Video memory16 GB32 GBHigher
Memory typeGDDR7GDDR7
Platform
PCIe interfaceUnknownUnknown
Power
Recommended PSUThe card maker's recommended minimum power supply.850 W1000 W
Power connectorsUnknownUnknown
Size and fit
LengthCheck against your case's maximum graphics card length.208 mm329.7 mm
Thickness (slots)UnknownUnknown
Height156 mm137.8 mm
Width29 mm67.8 mm

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Prices are the lowest listed new price from retailers we track, checked on the date shown, and can change. We may earn a commission from retailer links. How it works