Home / Models / Phi-3 Mini 128K Instruct / AMD Radeon RX 7800 XT 16 GB
Can Phi-3 Mini 128K Instruct run on AMD Radeon RX 7800 XT 16 GB?
Yes. Calculated memory fit: Phi-3 Mini 128K Instruct can run entirely in this GPU’s usable VRAM at one or more supported quantizations.
Can it run?
- Can it run?
- Yes, full GPU fit (calculated estimate).
- Full GPU fit?
- Yes
- Model
- Phi-3 Mini 128K Instruct · 3.8B
- GPU
- AMD Radeon RX 7800 XT 16 GB · 16 GB advertised
Memory calculation
Breakdown for Q4 at 8K context, batch size 1. Calculator v1.0.0.
| Model weights | 2.2 GB |
|---|---|
| KV cache | 3.0 GB |
| Runtime reserve | 0.6 GB |
| Safety margin | 0.3 GB |
| Required (estimated) | 6.2 GB |
| GPU usable VRAM | 14.4 GB |
Result: FITS IN VRAM
Quantization table
| Quantization | 2K | 4K | 8K | 16K | 32K | 64K | 128K |
|---|---|---|---|---|---|---|---|
| BF16 | Fits | Fits | Fits | Limited context | Limited context | Limited context | Limited context |
| FP16 | Fits | Fits | Fits | Limited context | Limited context | Limited context | Limited context |
| Q3 | Fits | Fits | Fits | Fits | Limited context | Limited context | Limited context |
| Q4 | Fits | Fits | Fits | Fits | Limited context | Limited context | Limited context |
| Q5 | Fits | Fits | Fits | Fits | Limited context | Limited context | Limited context |
| Q6 | Fits | Fits | Fits | Fits | Limited context | Limited context | Limited context |
| Q8 | Fits | Fits | Fits | Fits | Limited context | Limited context | Limited context |
What fits entirely in VRAM?
- BF16 at 2K context
- BF16 at 4K context
- BF16 at 8K context
- FP16 at 2K context
- FP16 at 4K context
- FP16 at 8K context
- Q3 at 16K context
- Q3 at 2K context
- Q3 at 4K context
- Q3 at 8K context
- Q4 at 16K context
- Q4 at 2K context
What requires RAM offload?
Offload is shown only when the model does not fully fit in usable VRAM but stays within the modeled offload allowance.
Available graphics cards
These SKUs use this GPU chip. Amazon CTAs appear only for EXACT/HIGH matches. Absence of a price does not change the compatibility result above.
GIGABYTE GAMING Radeon RX 7800 XT OC AMD 16 GB GDDR6
16 GB · Amazon EXACT
$961.87
Check price on Amazon
ASUS Dual -RX7800XT-O16G AMD Radeon RX 7800 XT 16 GB GDDR6
16 GB · Amazon EXACT
Check price on Amazon
ASUS TUF Gaming TUF-RX7800XT-O16G-GAMING AMD Radeon RX 7800 XT 16 GB GDDR6
16 GB · Amazon unmatched
Sources
Model: official config microsoft/Phi-3-mini-128k-instruct (main). GPU/product specs: Icecat. Compatibility: RigForAI calculator v1.0.0 estimated VRAM · Q8 at 8K: FITS_IN_VRAM. Amazon: affiliate commerce match, not a spec source.