Hardware Spec Index

Zephyra GX-8421 Ultra 16GB GDDR6 Graphics Card

Graphics Cards · Zephyra · SKU GX8421-ULTRA · Released 2024 · Updated 2026-10-22

Key facts

Benchmark index25,434 (Graphics Cards scale)
Category rank#13,215
Street price$769
Power250 W (TGP)
Performance per dollar33.07
Released2024

Specifications

BrandZephyra
ModelZephyra GX-8421 Ultra
Video memory16 GB GDDR6
Memory bus256-bit
Memory speed14 Gbps
Memory bandwidth448 GB/s
Shader units9,728
Boost clock2,565 MHz
Bus interfacePCIe 4.0 x16
Total graphics power (TGP)250 W
Power connectors1× 12V-2x6 (16-pin)
Recommended PSU650 W
Ray tracingHardware-accelerated
UpscalingXeSS 2
Display outputs1× HDMI 2.1, 3× DisplayPort 1.4a
Resizable BARSupported
Card size2.5-slot, 263 mm

Related guides

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Cite this page: Hardware Spec Index, “Zephyra GX-8421 Ultra 16GB GDDR6 Graphics Card”, https://vextor7.com/item/52947877 (accessed 2026-10-22).