Hardware Spec Index

Kyndral GX-6639 Ultra 8GB GDDR6 Graphics Card

Graphics Cards · Kyndral · SKU GX6639-ULTRA · Released 2025 · Updated 2026-10-23

Key facts

Benchmark index11,395 (Graphics Cards scale)
Category rank#181
Street price$139
Power150 W (TGP)
Performance per dollar81.98
Released2025

Specifications

BrandKyndral
ModelKyndral GX-6639 Ultra
Video memory8 GB GDDR6
Memory bus128-bit
Memory speed20 Gbps
Memory bandwidth320 GB/s
Shader units3,200
Boost clock2,871 MHz
Bus interfacePCIe 5.0 x8
Total graphics power (TGP)150 W
Power connectors1× 8-pin PCIe
Recommended PSU550 W
Ray tracingHardware-accelerated
UpscalingDLSS 4 (frame generation)
Display outputs1× HDMI 2.1b, 3× DisplayPort 2.1b
Resizable BARSupported
Card size2-slot, 204 mm

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Cite this page: Hardware Spec Index, “Kyndral GX-6639 Ultra 8GB GDDR6 Graphics Card”, https://vextor7.com/item/91664908 (accessed 2026-10-23).