Galax GeForce RTX 5080 HOF OC Lab Plus-X specifications and in-depth review

Galax GeForce RTX 5080 HOF OC Lab Plus-X

Manufacturer: Galax

The Galax GeForce RTX 5080 HOF OC Lab Plus-X is a high-specification graphics card from Galax, based on NVIDIA's Blackwell architecture and manufactured on a 5 nm process node. The card houses 10,752 shading units and delivers 58.71 TFLOPS of floating-point performance, making it a technically dense offering in the enthusiast graphics card segment. RGB lighting is included, and the card measures 349.4 mm in length and 160 mm in height.

On the memory side, the card is equipped with 16GB of GDDR7 VRAM running across a 256-bit bus at an effective speed of 30,000 MHz, yielding a maximum bandwidth of 960 GB/s. A TDP of 360W is specified, and connectivity is handled through one HDMI 2.1b port and three DisplayPort outputs, supporting up to four displays simultaneously. The card supports DirectX 12 Ultimate, OpenGL 4.6, OpenCL 3, ray tracing, DLSS, and Intel Resizable BAR, and includes ECC memory support alongside Double Precision Floating Point capability.

Pros
  • With 16GB of GDDR7 VRAM running at an effective 30,000 MHz and 960 GB/s of memory bandwidth, the card handles large memory workloads without obvious bottlenecks
  • Support for up to four simultaneous displays makes it well-suited for multi-monitor setups
  • Ray tracing and DLSS support are both present, enabling modern rendering techniques in compatible applications
  • ECC memory support adds data integrity protection, which benefits compute-oriented and professional workloads
  • The inclusion of three DisplayPort outputs alongside an HDMI 2.1b port gives flexible connectivity options for a range of monitors and displays
  • Double Precision Floating Point support broadens the card's utility beyond gaming into compute tasks
Cons
  • A 360W TDP places significant demands on system power delivery and case airflow
  • At 349.4 mm in length and 160 mm in height, the card requires a large case with adequate clearance
  • Air-water cooling is not supported, limiting cooling configuration options to air-only solutions
  • There are no USB-C or DVI outputs, which may restrict compatibility with certain older or specialized displays
Who is this for?

This card is well-matched for users running demanding compute and rendering workloads that benefit from Double Precision Floating Point support and ECC memory, such as simulation, data processing, or professional visualization tasks. The 16GB of GDDR7 VRAM paired with 960 GB/s of bandwidth also makes it a strong fit for high-resolution and multi-display workflows, where large frame buffers and fast memory throughput are necessary. Users who need to drive up to four screens simultaneously — whether for creative pipelines or complex desktop environments — will find the port configuration practical and flexible.

Who is this NOT for?

The card's 360W TDP and 349.4 mm length make it a poor fit for compact or small-form-factor builds, where power delivery headroom and physical clearance are typically limited. Users who rely on USB-C or DVI display connections will find no support for either interface here, which could be a genuine obstacle for those with older monitors or specific display hardware. Additionally, since air-water cooling is not supported, anyone looking to integrate the card into a custom liquid-cooling loop will need to look elsewhere.

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 Performance section of this card centers on a base GPU clock speed of 2295 MHz, rising to a turbo of 2730 MHz under load. With 58.71 TFLOPS of floating-point performance and a texture rate of 917.3 GTexels/s, the card is backed by 10,752 shading units, 336 texture mapping units, and 112 render output units. The pixel rate reaches 305.8 GPixel/s, GPU memory operates at 1875 MHz, and Double Precision Floating Point is supported.

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

This card carries 16GB of GDDR7 VRAM running across a 256-bit memory bus at an effective speed of 30,000 MHz, resulting in a maximum memory bandwidth of 960 GB/s. ECC memory is supported, adding a layer of data integrity for workloads that require it.

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 card supports DirectX 12 Ultimate, OpenGL 4.6, and OpenCL 3, covering a broad range of graphics and compute workloads. Ray tracing and DLSS are both supported, while XeSS (XMX) is not present. Multi-display technology is enabled with support for up to four displays simultaneously, and Intel Resizable BAR is included for optimized CPU-to-GPU data access. Stereoscopic 3D is supported, LHR is not implemented, and RGB lighting is built into the card.

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 four physical display connections in total. There are no USB-C, DVI, or mini DisplayPort outputs present on this card.

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 349.4 mm
height 160 mm

Built on the Blackwell architecture and fabricated on a 5 nm process, this card integrates 45,600 million transistors and connects via PCIe 5. It carries a TDP of 360W and does not include air-water cooling. Physical dimensions are 349.4 mm in width and 160 mm in height.

Final Verdict

The Galax GeForce RTX 5080 HOF OC Lab Plus-X is a technically dense graphics card that pairs the Blackwell architecture with 16GB of GDDR7 VRAM at 960 GB/s of memory bandwidth, positioning it firmly within the upper tier of the enthusiast and professional segments. Its support for ECC memory, Double Precision Floating Point, ray tracing, DLSS, and four simultaneous displays reflects a specification set built for users with serious compute and high-resolution rendering demands. The 360W TDP and 349.4 mm length do impose real constraints on compatible system builds, and the absence of USB-C and air-water cooling support narrows its fit further. For users whose workloads and hardware can accommodate these requirements, the HOF OC Lab Plus-X delivers a well-rounded and capable specification sheet that leaves little on the table.

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