ikawrakow/ik_llama.cpp
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### 🔀 [#77](https://github.com/ikawrakow/ik_llama.cpp/pull/77) - Adding Q6_0
| **Author** | `ikawrakow` |
| :--- | :--- |
| **State** | ❌ **Closed** |
| **Created** | 2024-10-02 |
| **Updated** | 2024-10-21 |
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#### Description
Main motivation was to see how it performs for quantized kv-cache. Disappointingly, it is slightly worse than `Q8_0` for K-cache and `IQ4_NL` for V-cache (this `Q8_0`+`IQ4_NL` combo needs the exact same memory as `Q6_0` for both caches).
Nevertheless, with a block size of 32 it is the same as the other legacy quants, beets `Q5_0` and `Q5_1` with a significant margin for PPL (it is almost as good as `Q6_K`), performance on Metal is quite a bit better than `Q5_0` and `Q5_1`, etc. So that, once I did the work to implement and test, why not add it?
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#### 💬 Conversation
👤 **Nexesenex** commented the **2024-10-21** at **09:42:19**:<br>
You should test the combo -ctk q6_0 -ctv q5_0.
After a few PPL tests, it seems to be a keeper for me, to replace q5_1 - q5_0 and be quite close to the K q8_0 mixes in term of quality with much less VRAM occupation.