Hardware Spec Index

Zephyra GX-1644 Ultra 16GB GDDR6 Graphics Card

Graphics Cards · Zephyra · SKU GX1644-ULTRA · Released 2021 · Updated 2026-10-22

Key facts

Benchmark index31,720 (Graphics Cards scale)
Category rank#38,855
Street price$1,309
Power325 W (TGP)
Performance per dollar24.23
Released2021

Specifications

BrandZephyra
ModelZephyra GX-1644 Ultra
Video memory16 GB GDDR6
Memory bus256-bit
Memory speed16 Gbps
Memory bandwidth512 GB/s
Shader units13,952
Boost clock2,381 MHz
Bus interfacePCIe 4.0 x16
Total graphics power (TGP)325 W
Power connectors3× 8-pin PCIe
Recommended PSU750 W
Ray tracingHardware-accelerated
UpscalingFSR 1 (spatial)
Display outputs1× HDMI 2.1, 3× DisplayPort 1.4a
Resizable BARSupported
Card size3-slot, 301 mm

Related guides

How Much VRAM Do You Need? 1080p, 1440p, 4K and AIResizable BAR (ReBAR) ExplainedChoosing a GPU for 1440p GamingChoosing a GPU for 4K GamingGDDR7 Memory ExplainedPCIe 5.0 Explained

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Cite this page: Hardware Spec Index, “Zephyra GX-1644 Ultra 16GB GDDR6 Graphics Card”, https://vextor7.com/item/8535336 (accessed 2026-10-22).