Gainward GeForce RTX 5080 Phantom GS

Name: Gainward GeForce RTX 5080 Phantom GS
Brand: Gainward
SKU: 56020

Manufacturer: Gainward

The Gainward GeForce RTX 5080 Phantom GS is a high-specification graphics card based on NVIDIA's Blackwell architecture, manufactured on a 5nm semiconductor process and packing 45,600 million transistors. It carries a base clock of 2295 MHz with a boost ceiling of 2730 MHz, and its 10,752 shading units contribute to a floating-point throughput of 58.71 TFLOPS. The card ships with RGB lighting and supports up to four simultaneous displays through a combination of one HDMI 2.1b port and three DisplayPort outputs.

On the memory side, the RTX 5080 Phantom GS equips 16GB of GDDR7 VRAM across a 256-bit bus, reaching an effective memory speed of 30,000 MHz and a maximum bandwidth of 960 GB/s. ECC memory support is included alongside Intel Resizable BAR. The card carries a TDP of 360W, connects via PCIe 5.0, and covers the full modern API stack with DirectX 12 Ultimate, OpenGL 4.6, and OpenCL 3.0, while also supporting ray tracing and DLSS.

Pros

Supports up to four displays simultaneously through a combination of one HDMI 2.1b and three DisplayPort outputs
16GB of GDDR7 VRAM across a 256-bit bus delivers 960 GB/s of memory bandwidth, suited for memory-intensive workloads
ECC memory support adds data integrity protection for error-sensitive tasks
Ray tracing and DLSS are both supported, enabling advanced rendering capabilities
Intel Resizable BAR support allows the CPU broader access to GPU memory, which can improve frame delivery
RGB lighting is included for users who prioritize visual customization in their build

Cons

A 360W TDP places significant demand on the power supply, requiring a well-specced system build
The card measures 331.9 mm in length, which may not fit in smaller or compact cases
Air-water cooling is not supported, limiting cooling options to the included air cooler
No USB-C output is available, which may be a limitation for users with USB-C monitors or displays
XeSS (XMX) is not supported, restricting upscaling options to DLSS only

Who is this for?

This card is well-suited to users who demand high throughput in rendering, compute, and gaming workloads, given its 58.71 TFLOPS of floating-point performance, 16GB of GDDR7 VRAM, and 960 GB/s of memory bandwidth. The inclusion of ECC memory support and Double Precision Floating Point makes it a practical fit for professional and technical workflows that require data accuracy, such as simulation or scientific computing. Users running multi-monitor setups of up to four displays will also find the port configuration accommodating, while DLSS and ray tracing support benefit those working in real-time 3D environments.

Who is this NOT for?

The card's 360W TDP and 331.9 mm length make it a poor match for users building in compact or small form factor cases, where both physical clearance and power delivery are commonly constrained. Since air-water cooling is not supported, users seeking liquid cooling integration will need to look elsewhere. Additionally, the absence of USB-C display outputs means it is not well-suited to users whose monitor setup relies on USB-C or Thunderbolt connectivity, as no such port is available on this card.

Performance:

GPU clock speed	2295 MHz
GPU turbo	2730 MHz
pixel rate	305.8 GPixel/s
floating-point performance	58.71 TFLOPS
texture rate	917.3 GTexels/s
GPU memory speed	1875 MHz
shading units	10752
texture mapping units (TMUs)	336
render output units (ROPs)	112
Has Double Precision Floating Point (DPFP)	✓

The Gainward GeForce RTX 5080 Phantom GS runs a base GPU clock of 2295 MHz with a boost frequency reaching 2730 MHz, and its 10,752 shading units deliver a floating-point throughput of 58.71 TFLOPS. The card's 336 texture mapping units produce a texture rate of 917.3 GTexels/s, while 112 render output units contribute to a pixel rate of 305.8 GPixel/s. GPU memory operates at 1875 MHz, and the card includes support for Double Precision Floating Point (DPFP), making it capable of handling workloads that require 64-bit precision arithmetic.

Memory:

effective memory speed	30000 MHz
maximum memory bandwidth	960 GB/s
VRAM	16GB
GDDR version	GDDR7
memory bus width	256-bit
Supports ECC memory	✓

The card is equipped with 16GB of GDDR7 VRAM running across a 256-bit memory bus, achieving an effective memory speed of 30,000 MHz and a maximum bandwidth of 960 GB/s. ECC memory support is also included, adding a layer of data integrity protection for error-sensitive workloads.

Features:

DirectX version	DirectX 12 Ultimate
OpenGL version	4.6
OpenCL version	3
Supports multi-display technology	✓
supports ray tracing	✓
Supports 3D	✓
supports DLSS	✓
has XeSS (XMX)	✕
AMD SAM / Intel Resizable BAR	Intel Resizable BAR
has LHR	✕
has RGB lighting	✓
supported displays	4

The Gainward GeForce RTX 5080 Phantom GS supports DirectX 12 Ultimate, OpenGL 4.6, and OpenCL 3.0, covering the full range of modern graphics and compute APIs. Ray tracing and DLSS are both supported, while XeSS (XMX) is not present on this card. It supports stereoscopic 3D and multi-display configurations of up to four screens simultaneously. Intel Resizable BAR is supported, though LHR is not included. The card also features RGB lighting, rounding out its software and hardware feature set.

Ports:

has an HDMI output	✓
HDMI ports	1
HDMI version	HDMI 2.1b
DisplayPort outputs	3
USB-C ports	0
DVI outputs	0
mini DisplayPort outputs	0

The card's output configuration consists of one HDMI 2.1b port and three DisplayPort outputs, providing a total of four display connections. There are no USB-C, DVI, or mini DisplayPort outputs present on this model.

General info:

GPU architecture	Blackwell
Thermal Design Power (TDP)	360W
PCI Express (PCIe) version	5
semiconductor size	5 nm
number of transistors	45600 million
Has air-water cooling	✕
width	331.9 mm
height	145.6 mm

The Gainward GeForce RTX 5080 Phantom GS is built on the Blackwell architecture, fabricated using a 5nm process and integrating 45,600 million transistors. It connects via PCIe 5.0 and carries a Thermal Design Power of 360W. The card does not include air-water cooling. Physically, it measures 331.9 mm in width and 145.6 mm in height.

Final Verdict

The Gainward GeForce RTX 5080 Phantom GS is a specification-dense graphics card that covers a broad range of demanding use cases, from real-time 3D rendering with ray tracing and DLSS to compute-oriented workloads backed by ECC memory and DPFP support. Its 960 GB/s of memory bandwidth paired with 16GB of GDDR7 VRAM positions it firmly within the upper tier of what current graphics hardware can offer for both professional and enthusiast workloads. That said, its 360W power draw and 331.9 mm footprint mean it is best matched to full-sized builds with adequate power delivery. For users whose system can accommodate it, the RTX 5080 Phantom GS represents a thoroughly capable and feature-complete card with very little left unchecked on the technical front.