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Galax GeForce RTX 5090 D Luna specifications and in-depth review

Galax GeForce RTX 5090 D Luna

Manufacturer: Galax

The Galax GeForce RTX 5090 D Luna is a high-end graphics card from Galax based on NVIDIA's Blackwell architecture, manufactured on a 5 nm process with 92,200 million transistors. It ships with 32GB of GDDR7 memory across a 512-bit bus, delivering a maximum memory bandwidth of 1,790 GB/s and an effective memory speed of 28,000 MHz — figures that reflect a substantial memory subsystem for demanding workloads. The card measures 348 mm in length and 155 mm in height, operates with a TDP of 575W, and connects via PCIe 5.0.

On the rendering side, the RTX 5090 D Luna carries 21,760 shading units, 680 texture mapping units, and 176 render output units, translating to a texture rate of 1,637 GTexels/s and a pixel rate of 423.6 GPixels/s. The GPU runs at a base clock of 2,017 MHz with a turbo frequency of 2,407 MHz. Feature support includes DirectX 12 Ultimate, OpenGL 4.6, OpenCL 3, ray tracing, DLSS, Intel Resizable BAR, ECC memory, stereoscopic 3D, and RGB lighting. Display output is handled through one HDMI 2.1b port and three DisplayPort outputs, allowing connectivity to up to four displays simultaneously.

Pros
  • The 512-bit memory bus paired with 32GB of GDDR7 VRAM delivers a maximum bandwidth of 1,790 GB/s, which supports very demanding rendering and compute workloads
  • ECC memory support adds data integrity protection, making the card viable for error-sensitive professional tasks alongside gaming
  • With 21,760 shading units, 680 TMUs, and 176 ROPs, the card has a dense compute configuration suited to rendering complex scenes
  • Support for ray tracing and DLSS expands compatibility with modern rendering pipelines and upscaling workflows
  • Four simultaneous display outputs — one HDMI 2.1b and three DisplayPort — provide flexible multi-monitor setup options
  • RGB lighting is built in for users who want to match the card visually within their system
Cons
  • A TDP of 575W places significant demands on the power supply, requiring a well-specified system build to run stably
  • At 348 mm in length and 155 mm in height, the card requires a large case with adequate clearance
  • No USB-C output limits connectivity options for users with USB-C or Thunderbolt-based displays
  • Air-water hybrid cooling is not available on this model, leaving users reliant solely on the stock cooling solution
  • XeSS (XMX) is not supported, restricting the upscaling options to DLSS only
Who is this for?

This card is well-suited to users running demanding rendering, simulation, or compute workloads that benefit from 32GB of GDDR7 VRAM, high memory bandwidth, and ECC memory support — including 3D artists, visualization professionals, and researchers working with large datasets. Gamers and content creators who need ray tracing and DLSS in modern pipelines will find the hardware configuration appropriate, and those running multi-monitor setups of up to four displays will have the connectivity to do so through the available HDMI 2.1b and DisplayPort outputs.

Who is this NOT for?

Users with compact or mid-tower cases may find the 348 mm length and 155 mm height difficult to accommodate, making this card poorly matched to small form factor builds. The 575W TDP is a significant power requirement that rules out systems without a high-capacity power supply, and builders working with tighter power budgets will find the card impractical. Additionally, users who rely on USB-C monitor connectivity or prefer XeSS-based upscaling will need to look elsewhere, as neither feature is available on this model.

Performance:

GPU clock speed 2017 MHz
GPU turbo 2407 MHz
pixel rate 423.6 GPixel/s
floating-point performance 104.8 TFLOPS
texture rate 1637 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 Luna operates at a base GPU clock of 2,017 MHz, boosting up to a turbo frequency of 2,407 MHz, while the GPU memory runs at 1,750 MHz. Its 104.8 TFLOPS of floating-point performance is backed by 21,760 shading units, 680 texture mapping units, and 176 render output units (ROPs), producing a texture rate of 1,637 GTexels/s and a pixel rate of 423.6 GPixel/s. The card also supports Double Precision Floating Point (DPFP), extending its utility to workloads that require 64-bit arithmetic precision.

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 Galax GeForce RTX 5090 D Luna is equipped with 32GB of GDDR7 VRAM running at an effective memory speed of 28,000 MHz across a 512-bit memory bus, yielding a maximum memory bandwidth of 1,790 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 Galax GeForce RTX 5090 D Luna supports DirectX 12 Ultimate, OpenGL 4.6, and OpenCL 3, covering a broad range of graphics and compute APIs. It includes hardware ray tracing, DLSS, and stereoscopic 3D support, while XeSS (XMX) and LHR are not present on this card. Multi-display technology is supported across up to four displays, and Intel Resizable BAR is available to help the CPU access GPU memory more efficiently. RGB lighting is built in for those who factor aesthetics into their build.

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 Galax GeForce RTX 5090 D Luna offers a total of four video outputs: one HDMI 2.1b port and three DisplayPort outputs. There are no USB-C, DVI, or mini DisplayPort connections on this card.

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

The Galax GeForce RTX 5090 D Luna is built on the Blackwell architecture, fabricated on a 5 nm process and packing 92,200 million transistors onto the die. It connects via PCIe 5.0 and carries a Thermal Design Power (TDP) of 575W. The card measures 348 mm in width and 155 mm in height, and it does not feature an air-water hybrid cooling solution.

Final Verdict

The Galax GeForce RTX 5090 D Luna is a graphics card built around a dense, high-throughput specification set — anchored by its 32GB of GDDR7 VRAM across a 512-bit bus with 1,790 GB/s of memory bandwidth — that positions it firmly at the upper end of the consumer and prosumer market. Its support for ray tracing, DLSS, ECC memory, and up to four simultaneous display outputs reflects a card designed for users who push hardware across both visual workloads and compute tasks. The 575W TDP and 348 mm length do impose real system requirements that will exclude a meaningful portion of potential users, but for those with the appropriate platform, the RTX 5090 D Luna represents a well-specified option with few compromises on raw capability.

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