Technical Snapshot

The Sapphire Radeon RX 7900 XT OC 20GB is a gaming desktop graphics card built on the AMD RDNA 3 architecture (Navi 31 GPU). It delivers 5,376 stream processors, 20 GB GDDR6 memory, on a 320-bit bus, boost clock of 2,445 MHz. The card connects via PCIe 4.0 x16 and draws 300W TDP, requiring a 750W minimum power supply. Part of the Sapphire OC product line, this card targets 4K/8K gaming, AI/ML inference, and professional rendering.

Use Case: 4K/8K gaming, AI/ML inference, real-time ray tracing, 3D rendering, content creation
Compatibility: Requires PCIe x16 slot, 750W PSU, adequate case clearance
Category: Desktop Graphics Card — Radeon RX 7900 XT (RDNA 3)

Sapphire GPU

Sapphire OC

Radeon RX 7900 XT OC 20GB

Name: Sapphire Radeon RX 7900 XT OC 20GB
Brand: Sapphire
SKU: 11323-01-40G

RDNA 3 · Navi 31 · 5,376 SPs · 20 GB GDDR6 · PCIe 4.0 x16

Stream Processors 5,376

VRAM 20 GB GDDR6

Boost Clock 2,445 MHz

TDP 300W

MPN11323-01-40G

EAN840777088746

CategoryGraphics Cards

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GPU Core & Memory

GPU Chip AMD Navi 31

Architecture RDNA 3

Stream Processors 5,376

Base Clock 2,000 MHz

Boost Clock 2,445 MHz

VRAM 20 GB GDDR6

Memory Bus 320-bit

PCIe Interface PCIe 4.0 x16

TDP 300W

Recommended PSU 750W

Cooling Dual fan

Display Outputs 3x DP 2.1, 1x HDMI 2.1

Full Specifications

Data sourced from Sapphire product specifications and AMD reference data

GPU
GPU Chip	AMD Navi 31
Architecture	RDNA 3
Stream Processors	5,376
Base Clock	2,000 MHz
Boost Clock	2,445 MHz
GPU Vendor	AMD
Memory
VRAM	20 GB GDDR6
Memory Bus	320-bit
Interface & Power
PCIe Interface	PCIe 4.0 x16
TDP	300W
Recommended PSU	750W
Card Design
Slot Width	2-slot
Cooling	Dual fan
Display Outputs	3x DP 2.1, 1x HDMI 2.1
Product
Brand	Sapphire
Brand Series	OC
GPU Series	Radeon RX 7900 XT
Segment	Gaming
MPN	11323-01-40G
EAN	840777088746
Physical
Weight	3.18 kg
Package Dimensions	45.72 x 26.67 x 12.7 cm

Support & Downloads

AMD Radeon Software Adrenalin (Latest)Windows 10/11 64-bit

AMD Drivers →

Sapphire Radeon RX 7900 XT OC 20GB User ManualPDF · Installation guide and specifications

Sapphire Support →

← Back to GPU Catalog

Frequently Asked Questions

What motherboards are compatible with the RX 7900 XT OC 20GB?

The Sapphire Radeon RX 7900 XT OC 20GB uses a PCIe 4.0 x16 interface and is compatible with any motherboard that has a PCIe x16 slot. This includes AMD AM5 and AM4 motherboards as well as Intel LGA 1851 and LGA 1700 boards. PCIe is backward-compatible, so older PCIe 3.0 slots will work at reduced bandwidth.

What power supply is recommended for the RX 7900 XT OC 20GB?

A minimum 750W power supply is recommended for the Sapphire Radeon RX 7900 XT OC 20GB. The card has a TDP of 300W, so adequate PSU headroom is critical for stable operation under peak load, especially when paired with a high-end CPU.

Will the RX 7900 XT OC 20GB fit in my case?

Based on package dimensions, the Sapphire Radeon RX 7900 XT OC 20GB requires clearance of approximately 45.72 cm (457 mm). Verify your case's maximum GPU length specification before purchasing. Also ensure sufficient PCIe slot clearance and adequate airflow.

How much VRAM does the RX 7900 XT OC 20GB have?

The Sapphire Radeon RX 7900 XT OC 20GB features 20 GB GDDR6 on a 320-bit bus. This is suitable for 4K/8K gaming, large AI/ML models, and professional rendering workloads.

Can the RX 7900 XT OC 20GB be used for compute workloads?

Yes. The Sapphire Radeon RX 7900 XT OC 20GB supports OpenCL and ROCm compute frameworks with 20 GB VRAM. It is suitable for GPU-accelerated rendering and some machine learning workloads. For production AI/ML, NVIDIA GPUs with CUDA support may offer broader software compatibility.

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Product: Sapphire Radeon RX 7900 XT OC 20GB
MPN: 11323-01-40G
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