Yes
Jack, on K7 L2 was driven from BackSide Bus
(cache was 2/3 or 3/5 of the core clock and packed on Slot A module), but earlier I'm not sure TBH!
It was my personal experience with lead me to believe that L2 cache on motherboards was connected to Northbridge because performance of CPU varied considerably from motherboard you used... (I'm speaking solely about cache intensive tests).
Besides if L2 cache on older motherboards was driven by CPU backside bus then how on earth very old P60 could known about 2MB cache on my Epox board??
Edit: I found something!
Link
Originally Posted by Lightman
Yes Jack, on K7 L2 was driven from BackSide Bus
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