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Radeon RX 7800 XT combines 16 GB GDDR6 with a 263 W board specification.
Radeon RX 7800 XT combines 16 GB GDDR6 with a 263 W board specification. A mixed workstation should preserve separate LLM and rendering configurations even when both tasks use the same GPU.
Official variants and the memory boundary
The table follows AMD materials for this model. It describes dedicated device memory, not system RAM. A “not verified” entry preserves a source gap; a neighboring configuration cannot supply the missing specification.
| AMD variant | Dedicated memory | Board power |
|---|---|---|
| 16 GB | 16 GB GDDR6 | 263 W |
Establish the LLM software path
The ROCm Core SDK 10.1.0 device list includes Radeon RX 7800 XT. This is an exact hardware entry, not approval for every operating system, PyTorch build, or quantization format. Select the specific GPU and OS in the compatibility matrix, then record the driver, runtime, and framework release. A listed card does not establish that every kernel used by an inference engine works correctly. Establish device detection, loading of a saved model revision, and a reference request before exploring sustained operation or concurrent requests.
A practical scenario for this model
Imagine a workstation that evaluates a model in the morning and renders frames in the evening. A graphics-driver update introduced for the rendering application may change the framework environment as well. Prepare two acceptance records sharing one hardware identity but retaining separate engine versions and reference workloads. Repeat both tasks after an update: a successful frame cannot establish unchanged LLM behavior, and a correct text answer cannot validate scene shaders. Avoid simultaneous execution in the initial acceptance experiment, otherwise allocation changes cannot easily be separated into update effects and resource competition. Once both independent profiles reproduce, investigate joint execution separately and define which process may occupy VRAM in each workstation mode. The intended daily workflow then has a reproducible software boundary rather than just a shared card name.
Validate Blender Cycles separately
RDNA 3 meets the HIP hardware floor in the Blender Cycles 5.2 LTS manual: RDNA 1 or newer. This renderer requirement is independent of ROCm LLM support; validate the actual driver, build, and scene on the intended machine.
Preserve the scene file, completed frame, and selected HIP-device log separately. Viewing an already rendered image cannot validate a new driver or replace another computation of the frame.
Preserve a machine-level acceptance record
The table gives AMD board-power specifications, not measured whole-computer consumption. Check the power supply, connectors, card dimensions, and airflow path for the actual system separately. Board power cannot establish inference speed.
Associate both RX 7800 XT acceptance records with the exact driver version. This supports a reasoned rollback without declaring the card defective merely because one application fails.
The acceptance artifact should connect board identity, software versions, model revision, and the workload actually exercised. After any of those changes, the old result describes its original run rather than establishing compatibility of the new configuration.
Related reading
RAM and VRAM: which memory matters for an AI server?; Make llama.cpp automatic fit settings reproducible; NVIDIA and AMD GPU catalogue for LLM inference and server rendering.