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LOSTCIRCUITS	SHORTCUTS: Dual Core vs HyperThreading Tech Specs Test Setup Memory Performance WorldBench5 3dsmax CineBench 2003 3D Gaming Power/Temperature Coefficient Power Hogs 3D Rendering Power DOOM3 3DMark2001SE 3DMark'05 Final Thoughts Give Us Some Feedback on this Review
AMD Athlon64 X2 "Toledo" Dual Core on Single Die
(Review by MS May 9, 2005)

3DMark2001SE

3DMark2001SE showed a somewhat unexpected increase in score, spurning our curiosity about the presence of multithreaded tasks inside 3DMark2001SE. This is of particular interest since Intel's HyperThreading has been notorious for causing an, albeit minor, performance hit in 3DMark2001SE. One issue to keep in mind here, however, is that only the four gaming runs are weighted into the final score, whereas all other applications such as the different shaders or bump mapping functions are not even factored in. In the case of the single cores, we found the highest power consumption in the High Polygon Count 1 Light and the vertex shaders. The High Polygon Count load on the CPU is somewhat expected since it involves complex geometry operations that are carried out on the CPU level whereas the vertex shaders should stress the GPU rather than the CPU. On the other hand, the CPU needs to keep control of the vertex shaders as well and the more powerful those are, the more data will be expected from the CPU which, in turn, will increase the CPU load.

For an apples to apples comparison, we have left out the Intel processors here, at least for the time being.

Power Consumption

Aside from the overall power draw being in the vicinity of that of the 3800+ Newcastle, the distribution of power is markedly different from that of the single core CPUs. The high Polygon Count / Single Light run still draws the highest power but the vertex shader apparently leaves at least 50% of the CPU at idle. Note also that the nature scene that draws the highest power of the gaming runs in single CPUs appears to only mildly challenge the X2 4800+.

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