Cached out!

February 18, 2007 4:55 PM

How come my L2 and L3 cache is disabled? Am I taking a performance hit?

Dual 1.42 GHz G4 FW800 Powermac. CHUD reports my L2 and L3 cache is disabled, and it won't come back on when I try to change it to be enabled in the processor prefs. I've got third party memory, as well as USB2 and SATA adapters in the machine. Am I really cache-less? Is it making me pokey?

posted by mzurer to computers & internet (4 comments total)

Check energy prefs-- on my old TiBook putting the proc in "reduced performance" mode would disable the L3.
posted by neustile at 5:12 PM on February 18, 2007

Are you sure about that?

LowEndMac thinks that the fastest Powermac g4 was a dual 1.25 GHz, without firewire 800.

Maybe you have a 3rd party CPU upgrade that doesn't have L2 and L3 cache, plus a FW800 card?
posted by b1tr0t at 5:14 PM on February 18, 2007

b1tr0t - see here -- it was released jan 28 2003, discontinued with the g5s june 23.
posted by neustile at 5:16 PM on February 18, 2007

Oops.

Your machine should have L2 and L3 cache.
posted by b1tr0t at 5:17 PM on February 18, 2007