Both are G4 revision 3.3 (7455B) but diferent production number.
Both G4 have 32kInstr/32kData L1 cache at CPU speed.
Both G4 have 256k L2 cache at CPU speed.
Both G4 have L3 cache at 1/6 CPU speed.
Dual have 2MB L3 cache per processor.
Single have 1MB L3 cahe per processor.
I couldn't see or measure any diference in speed due to the extra caché in Dual G4. Even in the monoprocessor tasks tests done in both CPU cards. Despite the video test will benefit of it, at least in theory.
Furthermore, testing the 166Mh MDX FSB in my other MDD (Single G4 overclocked to 1.667 Mhz, where I writing this) I couldn't saturate it easily. To do it I have to playback a full HD (1900 x 1080) uncompressed video!
Sorry for my English.
Both G4 have 32kInstr/32kData L1 cache at CPU speed.
Both G4 have 256k L2 cache at CPU speed.
Both G4 have L3 cache at 1/6 CPU speed.
Dual have 2MB L3 cache per processor.
Single have 1MB L3 cahe per processor.
I couldn't see or measure any diference in speed due to the extra caché in Dual G4. Even in the monoprocessor tasks tests done in both CPU cards. Despite the video test will benefit of it, at least in theory.
Furthermore, testing the 166Mh MDX FSB in my other MDD (Single G4 overclocked to 1.667 Mhz, where I writing this) I couldn't saturate it easily. To do it I have to playback a full HD (1900 x 1080) uncompressed video!
Sorry for my English.