merge.imatrix is a merge of kalomaze-group_10_merged.172chunks.imatrix and wiki.train.400chunks.imatrix, which took ~10min + ~20min to calulate on my machine.

full wiki.train would have taken 10h

for more info on imatrix handling see https://github.com/ggerganov/llama.cpp/pull/5302

ppl (512 wiki.test, 300chunks)

quant	ppl (lower is better)
f16(baseline)	5.8839 +/- 0.05173
q8_0	5.8880 +/- 0.05178
q5_k_m	5.8912 +/- 0.05177
q5_k_m(without-imat)	5.8893 +/- 0.05174
q4_k_m	5.9248 +/- 0.05216
q4_k_m(without-imat)	5.9492 +/- 0.05249
iq3_xxs	6.1984 +/- 0.05475
iq3_xxs(only-wiki)	6.1796 +/- 0.05446
iq3_xxs(only-kal)	6.1984 +/- 0.05475
iq3_xxs(withou-imat)	6.4228 +/- 0.05756

Interesting observations

despite merge.imatrix being different from kalomaze-group_10_merged.172chunks.imatrix, they produce the exact same quantized iq3_xxs model file. (same hash, checked multiple times)

q5_k_m has a lower perplexity with the imatrix. but that probably is caused by kalomaze-group_10_merged diverging enough from wiki.

Green-Sky/nakodanei-Blue-Orchid-2x7b-GGUF-iMatrix

ppl (512 wiki.test, 300chunks)

Interesting observations

Green-Sky/
nakodanei-Blue-Orchid-2x7b-GGUF-iMatrix