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| Intel Pentium4 840 Extreme Edition and 840D .... the name of the rose ... | |
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(Review by MS June 20, 2005) |
| AMD Athlon 64 3800+ (Venice) |
Lightwave [8]
We used two of the built-in demos, the first being the "dendrites" raytracing and the second an animated sequence from the tombs of the Egyptian Pharaos..
Dendrites
All four logical CPUs are used at full load which results in 100% CPU utilization during the rendering. HyperThreading boost the 840 EE performance, without it (EE-) or just as a standard "840D", the performance falls off quite a bit further behind the leading AMD processors.
Aegypten
This appears a typical situation where Thread Level Parallelism becomes counterproductive in that the performance with HT enabled takes a rather dramatic nose dive.
If we look at the CPU utilization, it is clear that something is not right, each logical core only does about 33 % load and as a result, the overall CPU performance is at only 1/3 of its capabilities. Whether it is a thread collision or an issue with cache mismanagement is not clear at this point.
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Pentium 4 840D (dual core) |
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