Add link to llama-imatrix

README.md

@@ -144,6 +144,8 @@ is unfortunately very frequent).
 
 ## What do I need to do to compute imatrix files for large models?
 
+Use [`llama-imatrix`](https://github.com/ggml-org/llama.cpp/blob/master/examples/imatrix/README.md) to compute imatrix files.
+
 ### Hardware
 
 * RAM: A lot of RAM is required to compute imatrix files. Example: 512 GB is just enough to compute 405B imatrix quants in Q8.