NDRG5 6J78X - AMD Radeon RX 550 4GB GDDR5 Full Height Graphics Card

OEM Radeon RX 550 graphics card with 4GB of GDDR5 memory, a standard full-height mounting bracket, and three digital monitor outputs. This single-slot card provides one full-size DisplayPort 1.4 and two Mini DisplayPort 1.4 connections, supporting up to three simultaneous 4K displays at 60Hz or one 5K display at 60Hz in supported configurations.

The card receives power directly through the motherboard’s PCIe slot and requires no auxiliary power connector. This version is intended for compatible Tower and Mini Tower desktops requiring a standard full-height expansion bracket.

Technical Specifications

• Primary Part Numbers: NDRG5, 6J78X
• Product Type: Internal discrete graphics card
• Graphics Processor: AMD Radeon RX 550
• GPU Architecture: Polaris
• Graphics Memory: 4GB
• Memory Type: GDDR5
• Memory Interface: 128-bit
• Memory Speed: Up to 7Gbps effective
• Memory Bandwidth: Up to 112GB/s
• Stream Processors: 512
• Boost Clock: Up to 1183MHz
• Host Interface: PCI Express 3.0 x8 electrical
• Connector Form: Physical PCIe x16 edge connector
• Video Outputs: 1x DisplayPort 1.4 and 2x Mini DisplayPort 1.4
• Maximum Simultaneous Displays: Up to 3
• Multi-Display Resolution: Up to three 4K displays at 60Hz
• Maximum Single-Display Resolution: Up to 5K at 60Hz
• DirectX Support: DirectX 12
• OpenGL Support: OpenGL 4.5 or later with compatible drivers
• Video Acceleration: H.264 and H.265 / HEVC hardware acceleration
• Cooling Type: Active cooling
• Cooling Fan: 1x integrated fan
• PCB Design: Short low-profile board installed on a full-height bracket
• Installed Bracket: Standard full height
• Slot Width: Single slot
• Board Power: Approximately 50W to 55W
• External Power Connector: None
• Power Source: Motherboard PCIe slot
• Board Family: OP14 / OPGA14
• PCB Reference: D091 / 109-D09187-00 series
• Application: Tower desktops, multi-monitor workstations, digital signage, 4K video playback, office applications, and light graphics workloads

Interchangeable / Replacement Part Numbers

6J78X, 06J78X, CN-06J78X, NDRG5, 0NDRG5, CN-0NDRG5

Full-Height Assembly References: OP14, OPGA14

The part numbers above identify the standard full-height bracket configuration. R9J9P and NJJMW use the electrically equivalent RX 550 board with a low-profile bracket and should not be treated as direct physical replacements unless the bracket is changed.

Need the Low-Profile Half-Height Version?

This page is for the standard full-height version used in compatible Tower and Mini Tower systems. For a Small Form Factor chassis requiring a low-profile bracket, purchase one of the following versions:

⭐ R9J9P - AMD Radeon RX 550 4GB GDDR5 Low Profile Graphics Card

⭐ NJJMW - AMD Radeon RX 550 4GB GDDR5 Low Profile Graphics Card

The full-height and low-profile versions use the same basic graphics-card design, but their installed mounting brackets are different.

✅ Confirmed Compatibility

Please note that the following list is not exhaustive. Compatibility depends on the system’s exact chassis, available PCIe slot, BIOS or UEFI support, PCIe slot-power allowance, and internal clearance. This full-height version is intended for Tower and Mini Tower systems and will not mount correctly in a Small Form Factor chassis without changing the bracket.

✔️ OptiPlex 3000 Series Tower: OptiPlex 3050 Tower upgrade configurations, OptiPlex 3060 Tower, OptiPlex 3070 Tower
✔️ OptiPlex 5000 Series Tower: OptiPlex 5050 Tower upgrade configurations, OptiPlex 5060 Tower, OptiPlex 5070 Tower
✔️ OptiPlex 7000 Series Tower: OptiPlex 7050 Tower upgrade configurations, OptiPlex 7060 Tower, OptiPlex 7070 Tower, OptiPlex 7071 Tower
✔️ OptiPlex XE Series Tower: OptiPlex XE3 Tower
✔️ Vostro Tower Models: Vostro 3980, Vostro 5090 configurations supporting the Radeon RX 550
✔️ ChengMing Tower Models: ChengMing 3980, ChengMing 3988
✔️ Additional Tower Systems: Systems with a conventional full-height PCIe x16 slot, clearance for a single-slot actively cooled card, sufficient PCIe slot power, and compatible system firmware may support this card after verification

☑️ Key Features

☑️ 4GB of dedicated GDDR5 graphics memory
☑️ Standard full-height mounting bracket for compatible tower systems
☑️ Single-slot construction
☑️ One full-size DisplayPort 1.4 output
☑️ Two Mini DisplayPort 1.4 outputs
☑️ Supports up to three simultaneous displays
☑️ Supports three 4K displays at 60Hz in validated configurations
☑️ Supports one 5K display at 60Hz
☑️ No 6-pin or 8-pin auxiliary power connector required
☑️ Active single-fan cooling
☑️ PCI Express 3.0 x8 interface with a physical x16 connector
☑️ Suitable for office productivity, digital signage, multi-monitor workstations, video playback, and light content creation

⚙️ Fit Notes

✓ This listing is specifically for the standard full-height bracket version.
✓ Confirm that the computer has a conventional full-height PCIe expansion slot with enough internal clearance.
✓ Do not order this version for an SFF chassis unless you already have the correct low-profile replacement bracket.
✓ Although the PCB itself is short, the installed mounting bracket is full height. Bracket height—not PCB height—determines which chassis version should be ordered.
✓ The card uses a physical PCIe x16 connector operating through eight PCIe 3.0 lanes.
✓ No auxiliary PCIe power cable is required. Power is supplied through the motherboard’s PCIe slot.
✓ This card has no HDMI, DVI, or VGA output. Displays using those connections require a compatible DisplayPort adapter.
✓ Two outputs are Mini DisplayPort. Standard DisplayPort cables will not connect directly to the Mini DisplayPort sockets.
✓ Three-display 4K operation requires compatible displays, appropriate cables or adapters, supported driver settings, and sufficient DisplayPort bandwidth.
✓ Do not confuse this 4GB Radeon RX 550 with the Radeon 550 2GB, RX 540, RX 640, or RX 6400. These are different graphics-card models.