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Radeon RX 7700 XT vs Radeon RX 7800 XT for Local AI

Quick answer: The RX 7800 XT over the 7700 XT buys 16GB instead of 12GB and 624 instead of 432 GB/s for $80 more.

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Which GPU is better for local AI workloads?

The 7800 XT is the clear AI pick: +4GB capacity (14B Q8 territory) and +45% bandwidth. The 7700 XT at 12GB suits 8B–12B models on a tighter budget.

Spec comparison: what actually differs

The table below is computed live from our hardware database. Positive deltas favor the Radeon RX 7700 XT.

SpecificationRadeon RX 7700 XTRadeon RX 7800 XTDifference
VRAM 12 16 -25%
Memory bandwidth 432 624 -31%
Memory type GDDR6 GDDR6 —
Memory bus 192 256 —
TDP 245 263 -7%
Stream processors 3456 3840 -10%
Architecture RDNA 3 RDNA 3 —
Launch MSRP $419 $499 -16%
Street price $419 $499 -16%

Specs from our sourced product database. See how we source data.

What about price?

Launch MSRP: $419 (7700 XT) versus $499 (7800 XT).

Which one should you buy for LLMs and image generation?

AMD · 2023

Radeon RX 7700 XT

Buy the 7700 XT only at a deep discount.

Full specs & benchmarks →
AMD · 2023

Radeon RX 7800 XT

Buy the 7800 XT — best value 16GB in AMD's 7000 lineup.

Full specs & benchmarks →

Is it faster for LLM inference?

14B Q8 only on 7800 XT; shared models notably faster.

How does it handle image generation?

Flux realistically needs the 7800 XT's 16GB.

Which AI models fit on each card?

Computed from our model VRAM database at Q4 quantization: Radeon RX 7700 XT has 12 GB, Radeon RX 7800 XT has 16 GB.

Fit only on the Radeon RX 7800 XT (16 GB)

Qwen3.8-27B ✓ Qwen3.5-27B ✓ Qwen3.6-27B ✓ Gemma 3 27B ✓ Wan 2.2 (A14B & TI2V-5B) ✓ OUI 1 ✓ Gemma 4 26B A4B IT ✓ Mistral Small 3.2 24B ✓ Devstral Small 2 24B Instruct ✓ Magistral-Small-2509 ✓

Fit on both cards

Gpt Oss 20B Maple Preview Ling Mini 2.0 Deepseek R1 Distill Qwen 14B Qwen3 14B Confucius4-T3PO WebWorld-14B ContextPilot 14B Phi 4 Phi 3 Medium Ministral 3 14B Instruct Ministral 3 14B Reasoning Gemma 3 12B Mellum 2.1 Thinking FLUX.1 dev Gemma 4 12B IT Ornith 1.5 9B OxCoder 9B Gemma 2 9B K2 Horizon 7B NeoHorse 1 9B Ministral 3 8B Reasoning Ministral 3 8B Instruct Granite 4.2 8B LFM2.5 8B A1B Qwen 3 8B ALoDLM 8B Deepseek R1 Distill Llama 8B Llama 3.1 8B Stable Diffusion 3.5 Large Gemma 4 E4B IT Edge0 8B A1B (preview) Ling-3.0-tiny Qwen2 5 7B ZGCM-1 7B Mistral 7B V03 Gemma 4 E2B IT K2 Horizon 3.7B Gemma 3 4B Ministral 3 3B Reasoning NeoHorse 1 4B Nanbeige4.2 3B Spark X2.5 4B Qwen3 4B Ministral 3 3B Instruct Granite 4.2 3B Stable Diffusion XL 1.0 Llama 3 2 3B Granite Swash 3B A600M LFM2.5 2.6B MiniCPM5 2B Qwen3 1 7B Spark X2.5 1.7B Whisper large-v3 Llama 3 2 1B K2 Horizon 0.9B Coqui XTTS-v2 Qwen3 0 6B GPT-X3 150M

Q4_K_M-equivalent sizes; context and quantization choices shift real limits. Check each model page for full quantization tables.

Frequently asked questions

7700 XT vs 7800 XT for AI?

7800 XT: 16GB and 624 GB/s beat 12GB/432 GB/s for both model capacity and speed.

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