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Galax GeForce RTX 5090 D Star Nox specifications and in-depth review

Galax GeForce RTX 5090 D Star Nox

Manufacturer: Galax

The Galax GeForce RTX 5090 D Star Nox is a high-specification graphics card based on NVIDIA's Blackwell architecture, manufactured on a 5nm process with 92,200 million transistors. It operates at a base clock of 2017 MHz with a boost frequency reaching 2407 MHz, and the card delivers 104.8 TFLOPS of floating-point performance, making it a technically dense option within the RTX 5090 product line. The card measures 348mm × 155mm and includes RGB lighting, with support for up to four simultaneous displays.

On the memory side, the Galax RTX 5090 D Star Nox is equipped with 32GB of GDDR7 VRAM running across a 512-bit bus at an effective speed of 28,000 MHz, yielding a maximum memory bandwidth of 1,790 GB/s. It supports ECC memory and Intel Resizable BAR, alongside DirectX 12 Ultimate, OpenGL 4.6, and OpenCL 3.0. The card features ray tracing and DLSS support, provides three DisplayPort outputs and one HDMI 2.1b port, connects via PCIe 5.0, and has a rated thermal design power of 575W.

Pros
  • The 32GB of GDDR7 VRAM across a 512-bit bus delivers 1,790 GB/s of memory bandwidth, which is well-suited for demanding rendering and compute workloads
  • Support for ray tracing and DLSS provides access to two widely-used modern rendering technologies
  • With 21,760 shading units and 680 TMUs, the raw shader and texture processing capacity is substantial
  • The card can drive up to four displays simultaneously, offering flexibility for multi-monitor setups
  • ECC memory support adds a degree of data integrity assurance for workloads where accuracy matters
  • Intel Resizable BAR support allows the CPU to access the full GPU framebuffer, which can benefit data throughput in compatible systems
Cons
  • A 575W TDP places significant demands on power supply capacity and case airflow, requiring careful system planning
  • The card does not include air-water cooling, so thermal management relies entirely on the case environment and any third-party cooling solution
  • At 348mm in length, physical fitment may be a challenge in smaller or mid-tower cases
  • There are no USB-C or DVI outputs, limiting connectivity options for users with older monitors or devices that rely on those interfaces
  • XeSS (XMX) is not supported, restricting upscaling options to DLSS only
Who is this for?

This card is well-matched to users running demanding rendering, simulation, or compute workloads that can take advantage of 32GB of GDDR7 VRAM and 1,790 GB/s of memory bandwidth. The combination of ray tracing, DLSS, and DirectX 12 Ultimate support makes it a fitting choice for those working in high-fidelity real-time 3D environments or game development pipelines. ECC memory support and Double Precision Floating Point capability also make it relevant for users with data-sensitive or precision-critical compute tasks. Those running multi-display workstations with up to four screens will find the output configuration accommodating as well.

Who is this NOT for?

The 575W TDP makes this card a poor fit for users with compact or low-airflow system builds, where heat dissipation and power delivery would be difficult to manage without a substantial case and power supply. The 348mm length rules it out for small form factor or mini-ITX builds where physical clearance is a hard constraint. Users who rely on USB-C or DVI display connectivity will find the port selection limiting, as neither interface is available on this card. Those who have no need for large VRAM capacities or high shader throughput would also find much of the card's specification set going unused in lighter, everyday workloads.

Performance:

GPU clock speed 2017 MHz
GPU turbo 2407 MHz
pixel rate 423.6 GPixel/s
floating-point performance 104.8 TFLOPS
texture rate 1636.8 GTexels/s
GPU memory speed 1750 MHz
shading units 21760
texture mapping units (TMUs) 680
render output units (ROPs) 176
Has Double Precision Floating Point (DPFP) ✓

The Galax GeForce RTX 5090 D Star Nox runs at a base GPU clock of 2017 MHz, boosting up to 2407 MHz under load, while GPU memory operates at 1750 MHz. The card houses 21,760 shading units, 680 texture mapping units, and 176 render output units, translating into a texture rate of 1636.8 GTexels/s and a pixel rate of 423.6 GPixel/s. At its peak, the GPU delivers 104.8 TFLOPS of floating-point performance and also supports Double Precision Floating Point (DPFP), broadening its suitability beyond standard rendering workloads.

Memory:

effective memory speed 28000 MHz
maximum memory bandwidth 1790 GB/s
VRAM 32GB
GDDR version GDDR7
memory bus width 512-bit
Supports ECC memory ✓

The card comes equipped with 32GB of GDDR7 VRAM running across a wide 512-bit memory bus, with an effective memory speed of 28,000 MHz that yields a maximum memory bandwidth of 1,790 GB/s. ECC memory support is also included, adding a layer of reliability for workloads where data integrity is a concern.

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 Galax GeForce RTX 5090 D Star Nox supports DirectX 12 Ultimate, OpenGL 4.6, and OpenCL 3, covering a broad range of rendering and compute APIs. It includes ray tracing and DLSS support, along with stereoscopic 3D and multi-display technology for up to four simultaneous outputs. Intel Resizable BAR is supported, while XeSS (XMX) and LHR are not present on this card. RGB lighting is built in, rounding out the feature set on the physical side.

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 three DisplayPort outputs and a single HDMI 2.1b port, totaling four display connections. There are no USB-C, DVI, or mini DisplayPort outputs on this model.

General info:

GPU architecture Blackwell
Thermal Design Power (TDP) 575W
PCI Express (PCIe) version 5
semiconductor size 5 nm
number of transistors 92200 million
Has air-water cooling ✕
width 348 mm
height 155 mm

Built on the Blackwell architecture, this card uses a 5nm manufacturing process and integrates 92,200 million transistors, connecting to the host system via PCIe 5.0. It carries a thermal design power of 575W and does not include air-water cooling. Physically, the card measures 348mm in width and 155mm in height.

Final Verdict

The Galax GeForce RTX 5090 D Star Nox is a specification-dense graphics card built around NVIDIA's Blackwell architecture, and its technical profile leaves little ambiguity about the workloads it is designed to handle. With 32GB of GDDR7 VRAM across a 512-bit bus delivering 1,790 GB/s of bandwidth, alongside ray tracing, DLSS, ECC memory support, and Double Precision Floating Point capability, it addresses the needs of users running serious rendering, compute, or multi-display workflows. That said, its 575W TDP and 348mm length mean system compatibility must be carefully considered before deployment. For users whose environments can accommodate those requirements, this card represents a technically thorough option within the RTX 5090 product line.