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White triple-fan graphics card with silver accents and ROG branding

ASUS

ASUS ROG Astral GeForce RTX 5080 16GB GDDR7 graphics card

SKU CH-19A4-5NNJE

16 GB GDDR7 GPU with 10752 CUDA cores, PCIe 5.0 x16, DLSS 4.0, two HDMI 2.1b and three DisplayPort 2.1a outputs for 7680 x 4320 resolution

  • Graphics processorGeForce RTX 5080
  • Memory capacity16 GB
  • Interface typePCI Express 5.0 x16
  • CUDA core count10752
  • Highest resolution7680 × 4320
  • Type of memoryGDDR7
  • 16 GB GDDR7 memory at 30 Gbps fuels 4K gaming
  • 10752 CUDA cores accelerate ray-tracing and AI workloads
  • DLSS 4.0 upscales frames with neural rendering
  • PCI Express 5.0 x16 doubles host bandwidth
  • HDMI 2.1b and DisplayPort 2.1a drive 7680×4320 displays

16GB GDDR7 graphics card

The ASUS ROG Astral GeForce RTX 5080 delivers 16GB of GDDR7 memory across a 256-bit interface. It targets enthusiasts building high-end systems for 4K gaming and professional creative workloads. The Blackwell architecture provides 10752 CUDA cores for parallel compute tasks. A PCI Express 5.0 x16 link supplies full bandwidth to modern platforms.

Memory capacity and bandwidth headroom

The 16GB frame buffer handles 4K textures, large 3D scenes and multi-application workflows without paging. At 30 Gbps effective clock the 256-bit bus moves data quickly for rasterisation and ray tracing. Workloads exceeding 16GB will spill to system memory and reduce throughput. The card supports DirectX 12 Ultimate and OpenGL 4.6 for current API features.

PCI Express 5.0 x16 interface

The x16 Gen 5 link is the single specification that decides platform compatibility. It requires a motherboard with a PCIe 5.0 slot to avoid bandwidth limitation. Older PCIe 4.0 or 3.0 slots will operate at reduced throughput. Verify your platform supports PCIe 5.0 x16 before purchase.

How it compares

Measured against everything we stock in Desktop GPUs & Video Cards, at today’s prices. Recalculated every night.

Price $2,803.99
Pricier than about 92% of the 4,285 comparable items (median $354.99).
Memory capacity 16 GB
Higher than about 80% of the 3,563 comparable items (median 8 GB).
CUDA core count 10752
Higher than about 90% of the 1,946 comparable items (median 4,352).

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Specifications

Product
Brand nameASUS
Product lineROG Astral
Model nameROG-ASTRAL-RTX5080-O16G-WHITE
Processor
TDP rating360 W
Memory
Type of memoryGDDR7
Display
Highest resolution7680 × 4320
Graphics
Graphics processorGeForce RTX 5080
Memory capacity16 GB
CUDA core count10752
Chipset makerNVIDIA
Graphics seriesNVIDIA GeForce RTX 50 Series
GPU architectureBlackwell
Effective memory speed30 Gbit/s
Memory bus width256-Bit
DirectX support12 Ultimate
OpenGL support4.6
Supported displays4
CrossFireX compatibilityNo
Multi-GPU supportNo
Audio & video
HDCP supportYes
Ports & slots
Interface typePCI Express 5.0 x16
HDMI ports2 x HDMI 2.1b
DisplayPort connectors3 x DisplayPort 2.1a
Power
Recommended power supply850 W
Power input connector1 × 16-Pin
Size & build
Max graphics card length358 mm
Card size14.1 × 5.9 × 3 in
Slots occupied3.8 Slots

Questions about this item

Will the PCI Express 5.0 x16 interface on the ROG Astral RTX 5080 work with my older motherboard that only has PCIe 4.0 slots?

Yes, the card is backward compatible and will run at PCIe 4.0 x16 speeds on a 4.0 motherboard. The 10752 CUDA cores and 16GB GDDR7 memory still deliver full compute performance, though peak bandwidth is limited to the slot generation.

How can I verify the card is running at the advertised 30 Gbps effective memory clock and 256-bit bus after installation?

Open GPU-Z or the NVIDIA control panel and confirm the memory interface reads 256-bit with a 30 Gbps effective clock. In games, enable the DLSS 4.0 overlay to see frame-generation active, proving the Blackwell architecture is functioning.

Does the box include any power adapters for the 12VHPWR connector, or do I need to buy a native ATX 3.0 power supply separately?

The package contains the graphics card, a quick-install guide, and a 12VHPWR-to-dual-8-pin adapter cable. If your power supply already has a native 12VHPWR port you can plug directly; otherwise use the included adapter with two separate 8-pin cables from your PSU.

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