Hardware Spec Index

Kyndral GX-8391 Ultra 12GB GDDR6 Graphics Card

Graphics Cards · Kyndral · SKU GX8391-ULTRA · Released 2021 · Updated 2026-10-19

Key facts

Benchmark index23,923 (Graphics Cards scale)
Category rank#35,840
Street price$629
Power235 W (TGP)
Performance per dollar38.03
Released2021

Specifications

BrandKyndral
ModelKyndral GX-8391 Ultra
Video memory12 GB GDDR6
Memory bus192-bit
Memory speed18 Gbps
Memory bandwidth432 GB/s
Shader units9,088
Boost clock1,818 MHz
Bus interfacePCIe 4.0 x16
Total graphics power (TGP)235 W
Power connectors2× 8-pin PCIe
Recommended PSU650 W
Ray tracingHardware-accelerated
UpscalingFSR 1 (spatial)
Display outputs1× HDMI 2.1, 3× DisplayPort 1.4a
Resizable BARSupported
Card size2.5-slot, 251 mm

Related guides

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Cite this page: Hardware Spec Index, “Kyndral GX-8391 Ultra 12GB GDDR6 Graphics Card”, https://vextor7.com/item/3552500 (accessed 2026-10-19).