Originally Posted by GsxR1000Ryda
I'm new to Intel so please bare with me. Say I'm going for 4ghz. In regards of performance, Is it better to have a lower BCLK with higher multi or vice versa?
If you want that little extra, you should go for higher Bclk, the Bclk it self donÂ´t add any performance increase but since UnCore (L3 Cache and Memory controller) frequency derivative from the Bclk, the higher Bclk the higher UnCore frequency.
With higher Bclk you also get somewhat higher memory ratio to choose from.
UnCore frequency is second best performence increaser, first one is Core frequency, third one is ram frequency and then timing.
Checkout this comparison I did a while back with my i7 875k
Maxxmem comparision between different Uncore frequency
Bclk 133, Core ~4,0GHz, QPI ~2400MHz, Uncore ~2400MHz and memory at 1600C7
Bclk 200, Core ~4,0GHz, QPI ~3600MHz, Uncore ~3600MHz and memory at 1600C7.
QPI link frequency ~2400MHz, Uncore Frequency ~2400MHz, Maxxmem 808,7
QPI link frequency ~3600MHz, Uncore Frequency ~3600MHz, Maxxmem 1160,7
y-cruncher comparision between Uncore 2400 and 3600
QPI link frequency ~2400MHz, Uncore Frequency ~2400MHz, y-cruncher 219,836
QPI link frequency ~3600MHz, Uncore Frequency ~3600MHz, y-cruncher 209,110
Higher Bclk > higher UnCore > a bit better performance.