Hardware Spec Index

Zephyra GX-3991 Core 16GB GDDR6X Graphics Card

Graphics Cards · Zephyra · SKU GX3991-CORE · Released 2021 · Updated 2026-10-19

Key facts

Benchmark index28,215 (Graphics Cards scale)
Category rank#20,121
Street price$969
Power275 W (TGP)
Performance per dollar29.12
Released2021

Specifications

BrandZephyra
ModelZephyra GX-3991 Core
Video memory16 GB GDDR6X
Memory bus256-bit
Memory speed21 Gbps
Memory bandwidth672 GB/s
Shader units11,264
Boost clock2,535 MHz
Bus interfacePCIe 4.0 x16
Total graphics power (TGP)275 W
Power connectors3× 8-pin PCIe
Recommended PSU700 W
Ray tracingHardware-accelerated
UpscalingFSR 1 (spatial)
Display outputs1× HDMI 2.1, 3× DisplayPort 1.4a
Resizable BARSupported
Card size3-slot, 268 mm

Related guides

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Cite this page: Hardware Spec Index, “Zephyra GX-3991 Core 16GB GDDR6X Graphics Card”, https://vextor7.com/item/8095916 (accessed 2026-10-19).