Which is better for local AI in 2026 — NVIDIA GeForce RTX 3060 12GB or AMD Radeon RX 7800 XT?

Same VRAM tier, similar workload ceilings. The choice depends on price, ecosystem, and form factor — not raw capability.

Can I run 70B Q4 models on these cards?

On the 16 GB card, 70B Q4 fits at very short context (~2K) only — workable for benchmarking, not for production agent loops.

Should I buy used or new at this tier?

Used wins decisively at the 24 GB tier where used cards (3090, 4090) deliver the same VRAM ceiling at half the cost. Verify ECC error counts, replace thermal pads, demand a 30-min under-load demonstration before paying. New wins when warranty matters psychologically or you specifically need newer architecture features.

What about power, noise, and heat under sustained AI load?

Sustained inference draws closer to nameplate TDP than gaming benchmarks suggest. Plan PSU sizing with 200-250W headroom over GPU TDP. Improving case airflow helps the GPU more than swapping the CPU cooler.

How long will these cards stay relevant for local AI?

24 GB consumer GPUs (3090, 4090) stay inference-relevant 4-6 years. Apple Silicon stays relevant ~5 years before macOS / framework drift. Don't buy for "future-proofing" — buy for what you'll run this year. Use /will-it-run to verify your specific model + hardware combination.

How is the custom comparison different from your editorial verdicts?

The custom comparison is generated from real catalog data (VRAM, bandwidth, compute, power, runtime support). The 13+ editorial pair pages are hand-written buyer guides with decision rules, avoid-each lists, and qualitative tier scoring. Use editorial when we have one for your pair; use custom for everything else.

Why don't all comparisons have an editorial verdict?

We hand-write editorial verdicts only for the highest-search-volume pairs (RTX 4090 vs 5090, dual 3090 vs 5090, etc.). Writing a quality verdict takes hours. The custom tool covers the long tail without inventing fake editorial.

Are the prices real-time?

No. Prices in the catalog are updated periodically by editorial. Click through to a retailer for the live price.

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Yes — the catalog includes mobile GPUs and laptop SoCs. Pick any two entries from the dropdown.

Custom comparisonEditorialReviewed May 2026

NVIDIA GeForce RTX 3060 12GB vs AMD Radeon RX 7800 XT

Spec-driven comparison from our catalog. For curated editorial verdicts on the most-asked pairs, see the head-to-head index.

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Spec matrix

Dimension	NVIDIA GeForce RTX 3060 12GB	AMD Radeon RX 7800 XT
VRAM	12 GB budget (13B Q4)	16 GB mid (13B-32B Q4; 70B Q4 short ctx)
Memory bandwidth	360 GB/s limited (300-500 GB/s)	— —
FP16 compute	12.7 TFLOPS	—
FP8 compute	—	—
Power draw	170 W mainstream desktop	263 W enthusiast (850W PSU)
Price	~$249 (street)	~$459 (street)
Release year	2021	2023
Vendor	nvidia	amd
Runtime support	CUDA, Vulkan	ROCm, Vulkan

Spec data from our hardware catalog. This is a generated spec compare, not a hand-written editorial verdict. For editorial picks on the most-asked pairs, see our curated head-to-heads.

Most users should buy

Primary recommendation

NVIDIA GeForce RTX 3060 12GB

Same VRAM tier (12 GB vs 16 GB) but the NVIDIA GeForce RTX 3060 12GB is dramatically cheaper. The AMD Radeon RX 7800 XT's premium isn't justified for VRAM-bound workloads at this tier.

Decision rules

Choose NVIDIA GeForce RTX 3060 12GB if

You're cost-conscious — saves ~$210 vs the AMD Radeon RX 7800 XT.
Your stack is CUDA-locked (vLLM, TensorRT-LLM, FlashAttention, day-zero new model wheels).
Power-budget constrained — 170W vs 263W means smaller PSU + lower electricity over time.

Choose AMD Radeon RX 7800 XT if

No strong differentiators in AMD Radeon RX 7800 XT's favor at this comparison tier.

Biggest buyer mistake on this comparison

Buying based on the spec sheet without verifying the actual workload requirement. Run /will-it-run with your specific model + context-length combination before committing — the math is exact and frequently surprising.

Workload fit

How each card handles common local AI workloads. “Tie” means both cards meet the bar; pick on other axes (price, ecosystem, form factor).

Workload	Winner	Notes
Coding agents (Aider, Cursor, Continue)	AMD Radeon RX 7800 XT	Code agents need 16 GB minimum for 13B-32B Q4. Below that, latency degrades from offloading.
Ollama / LM Studio chat	Tie	Both run Ollama fine. 16 GB unlocks multi-model serving via OLLAMA_KEEP_ALIVE.
Image generation (SDXL, Flux Dev)	NVIDIA GeForce RTX 3060 12GB	Image gen is compute-bound. 16 GB fits SDXL + Flux Dev FP8 with care; LoRA training tight.
Local RAG (embedding + LLM)	AMD Radeon RX 7800 XT	RAG with 13B-class LLM fits at 16 GB. 70B LLM RAG needs 24+ GB.
Long-context chat (32K+ context)	Neither fits	16 GB is tight for long context — KV cache eats VRAM linearly with context length.
Voice / Whisper transcription	Tie	Whisper Large V3 fits in 4-8 GB. Both cards likely overkill for transcription-only workloads.
Video generation (LTX-Video, Mochi)	Neither fits	Below 24 GB, local video gen isn't realistic with current models.

VRAM reality check

Multi-GPU does NOT pool VRAM by default. Two 24 GB cards = 48 GB combined ONLY when the runtime supports tensor-parallel inference (vLLM, ExLlamaV2, llama.cpp split-mode). For models that don't tensor-parallel cleanly, you're stuck at single-card VRAM.
At 16 GB, 13-32B Q4 fits comfortably. 70B Q4 fits at very short context (~2K) — usable for benchmarking but not for agent workflows. Plan for the 24 GB tier if 70B is your roadmap.

Power, noise, and thermals

NVIDIA GeForce RTX 3060 12GB TDP: 170W. AMD Radeon RX 7800 XT TDP: 263W. Both fit standard ATX builds with 750-850W PSUs.
Used cards: replace thermal pads on any used purchase older than 18 months ($30-50 + 1 hour of work). Ex-mining cards specifically — cooler reseat improves thermals 5-10°C, often the difference between throttling and stable load.

Used-market intelligence

Mining-rig provenance is dominant for used NVIDIA GeForce RTX 3060 12GB listings. Not inherently disqualifying — mining wears fans (replaceable) and thermal pads (replaceable), rarely silicon. Verify ECC error counts with nvidia-smi (or vendor equivalent); any value above ~100 = walk away.
Demand a 30-minute under-load demonstration before paying — screen-recorded inference at 90%+ utilization. Sellers refusing this are red flags.
Replace thermal pads on any used GPU older than 18 months. Cheap insurance ($30-50 + 1 hour) that often delivers 5-10°C cooler operation under sustained inference.
Used cards have no warranty. Budget for a 2-3 year operational horizon and plan to resell if your usage tier changes. Used silicon resale is mature in 2026 — selling later is realistic.

Upgrade-path logic

If you already own the NVIDIA GeForce RTX 3060 12GB, the AMD Radeon RX 7800 XT is a side-grade — same VRAM tier means same workload ceiling. Only upgrade if you specifically need newer architecture features (FP8 native, FlashAttention 3, warranty refresh).

Better alternatives to consider

Same VRAM cheaper

RTX 4060 Ti 16 GB — cheapest 16 GB CUDA card →

If 16 GB is your ceiling, the RTX 4060 Ti 16 GB at $450-550 is the value floor for that tier.

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