Can I Run Gemma 3 on AMD Radeon RX 7800 XT?
Written by Jakub Rusinowski · Last updated September 29, 2026
Yes, comfortably — Gemma 3 12B Instruct at Q4_K_M needs 11.1 GB at 8K context (7.2 GB weights + 3.9 GB KV cache/overhead), leaving ~4.9 GB of the AMD Radeon RX 7800 XT's 16 GB, at ~40 tok/s (est.), with room for up to 16K context.
See what else this hardware can run →
or compare on Vast.ai from $0.35/hr (typical low · varies)
As an Amazon Associate we earn from qualifying purchases. Cloud GPU links are referral links — we may earn a commission at no extra cost to you.
AMD Radeon RX 7800 XT Specs
| VRAM | 16 GB |
| Memory Bandwidth | 624 GB/s |
Gemma 3 12B Instruct on the AMD Radeon RX 7800 XT: VRAM by quantization
| Quant | VRAM needed | Fits 16 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 27.9 GB | ✗ No | — | — |
| Q8_0 | 16.6 GB | ✗ No | — | Build for this |
| Q6_K | 13.7 GB | ✓ Yes | 8K | — |
| Q5_K_M | 12.4 GB | ✓ Yes | 16K | Build for this |
| Q4_K_M | 11.1 GB | ✓ Yes | 16K | Build for this |
| Q3_K_M | 9 GB | ✓ Yes | 16K | — |
| Q2_K | 7.8 GB | ✓ Yes | 16K | — |
Assumes an 8K-token context with an f16 KV cache. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 16 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
Context costs VRAM too. At Q4_K_M on the AMD Radeon RX 7800 XT: 8K 11.1 GB · 32K 20.4 GB ✗ · 128K 57.4 GB ✗. Past 32K it no longer fits 16 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
No compatible GPU? Gemma 3 12B Instruct on 16 GB of system RAM, CPU only: runs, but it is tight.
Gemma 3 Sizes That Fit the AMD Radeon RX 7800 XT (at 8K context)
| Gemma 3 12B Instruct | Q4_K_M · 11.1 GB at 8K context · ~40 tok/s (est.) |
| Gemma 3 4B Instruct | Q4_K_M · 4.4 GB at 8K context · ~92 tok/s (est.) |
| Gemma 3 1B Instruct | Q4_K_M · 2 GB at 8K context · ~174 tok/s (est.) |
At 2 hrs/day, buying (~$499) beats renting at $0.34/hr after about 2.0 years.
Affiliate links — we may earn a commission if you sign up, at no extra cost to you.
Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
FAQ
Can I run Gemma 3 on the AMD Radeon RX 7800 XT?
Yes, comfortably — Gemma 3 12B Instruct at Q4_K_M needs 11.1 GB at 8K context (7.2 GB weights + 3.9 GB KV cache/overhead), leaving ~4.9 GB of the AMD Radeon RX 7800 XT's 16 GB, at ~40 tok/s (est.), with room for up to 16K context.
What's the best Gemma 3 size for the AMD Radeon RX 7800 XT?
Gemma 3 12B Instruct at Q4_K_M quantization needs 11.1 GB at 8K context (7.2 GB weights + 3.9 GB KV cache/overhead), estimated ~40 tokens/sec, up to 16K context.
Every Gemma 3 size on the AMD Radeon RX 7800 XT
| Size | VRAM at 8K | Verdict | Speed |
|---|---|---|---|
| Gemma 3 27B Instruct | 25.4 GB | Does not fit | — |
| Gemma 3 12B Instruct | 11.1 GB | Runs | ~40 tok/s |
| Gemma 3 4B Instruct | 4.4 GB | Runs | ~92 tok/s |
| Gemma 3 1B Instruct | 2 GB | Runs | ~174 tok/s |
Gemma 3 on Other GPUs
- Gemma 3 on NVIDIA GeForce RTX 5080
- Gemma 3 on NVIDIA GeForce RTX 5070 Ti
- Gemma 3 on NVIDIA GeForce RTX 5060 Ti 16GB
- Gemma 3 on NVIDIA GeForce RTX 4080 Super
- Gemma 3 on NVIDIA GeForce RTX 4080
Popular Models on the AMD Radeon RX 7800 XT
- DeepSeek R1 on AMD Radeon RX 7800 XT
- Qwen 3 on AMD Radeon RX 7800 XT
- Qwen 2.5 Family on AMD Radeon RX 7800 XT
VRAM Tier
Troubleshooting
Buying Guide
← Can I Run It? | Gemma 3 Model Page | AMD Radeon RX 7800 XT GPU Page | VRAM calculator | Check Your Hardware