Hardware Spec Index

Zephyra GX-8421 Prime 12GB GDDR6 Graphics Card

Graphics Cards · Zephyra · SKU GX8421-PRIME · Released 2021 · Updated 2026-10-20

Key facts

Benchmark index21,540 (Graphics Cards scale)
Category rank#18,638
Street price$429
Power215 W (TGP)
Performance per dollar50.21
Released2021

Specifications

BrandZephyra
ModelZephyra GX-8421 Prime
Video memory12 GB GDDR6
Memory bus192-bit
Memory speed20 Gbps
Memory bandwidth480 GB/s
Shader units7,936
Boost clock2,223 MHz
Bus interfacePCIe 4.0 x16
Total graphics power (TGP)215 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, 249 mm

Related guides

How Much VRAM Do You Need? 1080p, 1440p, 4K and AIResizable BAR (ReBAR) ExplainedGDDR7 Memory ExplainedChoosing a GPU for 1440p GamingChoosing a GPU for 4K GamingPCIe 5.0 Explained

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Cite this page: Hardware Spec Index, “Zephyra GX-8421 Prime 12GB GDDR6 Graphics Card”, https://vextor7.com/item/19376830 (accessed 2026-10-20).