Intel plans to deliberately limit Sandy Bridge overclocking

[informal]

1,5mb figure come form the ES that where posted here.

dualcore with 3mb
http://www.xtremesystems.org/forums/...d.php?t=250145

quadcore with 6mb
http://forum.coolaler.com/showthread.php?t=240578

2,5mb numbers are still rumors, but since the 1,5mb where spot on I guess there is also somewhat true for SB-E.

Half a megabyte per each core's cache block is reserved for a GPU,so QC SB has 6(8)MB and SB-E has 15MB of usable cache(or following the previous math,actually 3x6=18MB of total cache).