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#1
September 17th, 2003, 07:57 AM
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| NOO!!! Powerbooks have no L3 cache!
I just noticed something....all the powerbooks (12"-17") have only 512k L2 cache, and NO L3! That makes the 17" about as fast as an iMac! Same processor, same RAM, same cache.....and to think, I was gonna sell my iMac for one.
__________________ 17" iMac LCD 1ghz/80/Superdrive Harman/Kardon Soundsticks El Gato EyeTV 15 Gb iPod  |
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#2
September 17th, 2003, 08:33 AM
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Is there any huge difference with and without L3 cache? I mean summa summarum
__________________ iBook 600; 12''; 640mb; 8mb Rage; DVD-CDRW-Combo, 20GB P4 1.6; 2x80GB Raid1 (file-server) tiBook 1Ghz, Superdrive, 768MB, 64mb 9000, 60GB |
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#3
September 18th, 2003, 01:49 PM
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The L3 cache was originally added to make up for the small L2 cache in the 7450 ans 7455 processoers (256 KB). The systems that used the 7400 and 7410 processors didn't have L3 caches. They usually had 1 MB L2 caches. The new PBs use the 7457 processors which have 512 KB L2 caches (not sure what speed, full speed maybe?) |
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#4
September 18th, 2003, 03:14 PM
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^if by "full speed" you mean it runs at the processor's speed, then yes, it's full speed. Simply put, with added L2 cache, no L3 cache is needed. With no L3 cache, prices drop...
__________________ Back because Garageband was just too tempting. Macbook 13" 2.4GHz 2GB 250GB iPod Touch 2nd generation 16GB iPod Nano 2nd generation 4GB |
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#5
September 18th, 2003, 08:40 PM
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My aging G4 with an Encore Dual 500 has a nice fat 2 x 1MB L2 cache (one per CPU) and no L3 so that should be an indication that things are all right... Quote:
__________________ Macbook (Black) C2D/120GB/2GB | G5/1.6 250GBx2/1.25GB Free Mobile Phone Ringtone, Application, & Screensaver Uploader |
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