DrBombcrater wrote:
In th end, I think G4 is faster than G3 at same frequency. It would be nice to make some benchmark between these two.
There were Quake scores posted in a thread on AW. I can't reference the exact numbers because AW is down right now, but the uA1's 750GX/800 returned a better score than an XE with a 1.1GHz G4 (I think it was a 7447, but not sure).
the GX (Gekko) has added SIMD instructions (also found in the Nintendo Gamecube). So the G4's vector processing advantage is lessened, the GX is also a newer design so it's internally more efficient than the G4 for most things.
here's the Gamecube version's specs:
Clock frequency : 485 MHz (actually 487.5)
CPU capacity : 1125 Dmips (Dhrystone 2.1)
Internal data precision : 32-bit Integer & 64-bit floating-point
External bus : 1.3GB/second peak bandwidth (32-bit address space, 64-bit data bus 162.5 MHz clock)
Internal cache L1: instruction 32KB, data 32KB (8 way) L2: 256KB (2 way)
notice the L2 cache! This lets the graphics chip (ATI Flipper) which is also the MMU, do it's thing with less interuption from the CPU...
see also:
http://news.zdnet.com/2100-9595_22-503797.html?legacy=zdnn
