estimate
Can I run Ornith-1.5-122B on an RX 7900 XTX?
No: needs ~76.8 GB, this card has ~23.4 GB usable (estimate)
speed: not estimated for MoE yet
Can I run Ornith-1.5-122B on an RX 7900 XTX? No: needs ~76.8 GB, this card has ~23.4 GB usable (estimate). About 76.8 GB at Q4_K_M (estimate).
VRAM per quant for Ornith-1.5-122B
Updated . The later of the hardware price date and the formula date.
| Quant | Context | Weights | KV | Overhead | Total | Usable | Fit |
|---|---|---|---|---|---|---|---|
| Q4 Q4_K_M | 8,192 tokens | 75.8 GB measured GGUF file size | 0.2 GB estimate | 0.8 GB estimate | 76.8 GB estimate | 23.4 GB estimate | no |
| Q5 Q5 (~0.71 bytes/param) | 8,192 tokens | 88.8 GB estimate | 0.2 GB estimate | 0.8 GB estimate | 89.8 GB estimate | 23.4 GB estimate | no |
| Q8 Q8 | 8,192 tokens | 133.8 GB estimate | 0.2 GB estimate | 0.8 GB estimate | 134.8 GB estimate | 23.4 GB estimate | no |
| FP16 FP16 | 8,192 tokens | 250.2 GB estimate | 0.2 GB estimate | 0.8 GB estimate | 251.2 GB estimate | 23.4 GB estimate | no |
| Q4, longer context | 32,768 tokens | 75.8 GB measured GGUF file size | 0.8 GB estimate | 0.8 GB estimate | 77.4 GB estimate | 23.4 GB estimate | no |
Formula estimate, not a benchmark. Method →
Cheapest catalog option that fits at Q4
Mac Studio M4 Max 128GB, catalog price, €3,290, dated 2026-10-16. No buy link.
This hardware
$1,404€1,254
used (3-month median)
price as of 17 Oct 2026
new in stock, €3,972 at GPU PRIX on 17 Oct 2026 (unusually high): $4,447€3,972. GPU PRIX. More than 1.5× the €1,254 3-month median, so this listing is not the headline.
GPU PRIXChecked GPU PRIX on 17 Oct 2026. The page says last updated Oct 17, 2026. The 3-month median is €1,254. The only in-stock board, ASUS TUF Gaming RX 7900 XTX at €3,972, is more than 1.5× that median, so the median is the stored price. The header current low of €43 is a DisplayPort cable, not the card. XFX Speedster was €1,049 and out of stock. MSI Gaming Trio €3,047 and POWERCOLOR Red Devil €3,152 were out of stock. On 16 Oct 2026 the stored new figure was the out-of-stock price, about €1,050. 12-month median €1,101. Not a pcprice.watch sold-listing median.
Embed this
Ornith-1.5-122B on RX 7900 XTX
[](https://localllmrig.com/can-i-run/ornith-1.5-122b/rx-7900-xtx?utm_source=badge)
Questions
- Can I run Ornith-1.5-122B on an RX 7900 XTX?
- No: needs ~76.8 GB, this card has ~23.4 GB usable (estimate).
- How much memory does Ornith-1.5-122B need at Q4?
- About 76.8 GB at 8,192 tokens (estimate): 75.8 GB weights (measured GGUF file size), 0.2 GB KV cache, 0.8 GB overhead.
- How fast is Ornith-1.5-122B on RX 7900 XTX (estimate)?
- speed: not estimated for MoE yet
Rig Report waitlist
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Read next: Building a local LLM rig in the RAMageddon.