Hardware Spec Index

Zephyra GX-6421 Ultra 16GB GDDR6 Graphics Card

Graphics Cards · Zephyra · SKU GX6421-ULTRA · Released 2022 · Updated 2026-10-26

Key facts

Benchmark index39,285 (Graphics Cards scale)
Category rank#20,992
Street price$1,629
Power375 W (TGP)
Performance per dollar24.12
Released2022

Specifications

BrandZephyra
ModelZephyra GX-6421 Ultra
Video memory16 GB GDDR6
Memory bus256-bit
Memory speed16 Gbps
Memory bandwidth512 GB/s
Shader units16,640
Boost clock2,418 MHz
Bus interfacePCIe 4.0 x16
Total graphics power (TGP)375 W
Power connectors3× 8-pin PCIe
Recommended PSU800 W
Ray tracingHardware-accelerated
UpscalingFSR 2
Display outputs1× HDMI 2.1, 3× DisplayPort 1.4a
Resizable BARSupported
Card size3-slot, 309 mm

Related guides

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Cite this page: Hardware Spec Index, “Zephyra GX-6421 Ultra 16GB GDDR6 Graphics Card”, https://vextor7.com/item/21458849 (accessed 2026-10-26).