Looks like the dual core is about the same speed as the single cores. This is different from the results obtained by barefeats here, where the dual core was a bit faster (not in cinebench though...)
There shouldn't be that much of a difference until you account for a better graphics system. But the 6600 PCI-E is probably slower than the AGP ATI X800. But you never know.
Most of the improvements in performance coming with the dual core chips, are related to the larger L2 cache and the DDR 553.
The main cons of DDR 553 over DDR 400 is the latency. But when it's related to latency, the L2 cache rule. The double sized cache of the dual core, make a difference here.
Comments
Rendering (Single CPU): 287 CB-CPU ( 288 )
Rendering (Multiple CPU): 513 CB-CPU ( 510 )
Multiprocessor Speedup: 1.79 ( 1.77 )
Shading (CINEMA 4D) : 285 CB-GFX ( 276 )
Shading (OpenGL Software Lighting) : 860 CB-GFX ( 817 )
Shading (OpenGL Hardware Lighting) : 1686 CB-GFX ( 1493 )
OpenGL Speedup: 5.92 ( 5.40 )
Source: xlr8yourmac
Looks like the dual core is about the same speed as the single cores. This is different from the results obtained by barefeats here, where the dual core was a bit faster (not in cinebench though...)
The main cons of DDR 553 over DDR 400 is the latency. But when it's related to latency, the L2 cache rule. The double sized cache of the dual core, make a difference here.