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We just confirmed that there is no benefit in running TrueSpace5.1 with HT enabled, however, what happens if we are running TS5.1 and simultaneously run 3DMark2001SE in the background. Before getting there, we need to take a look at the impact of HT on 3DMark2001 when running as a single application. For reference, we are adding the scores from the comparison systems.

3DMark2001SE scores, HT enabled or disabled
We already hinted at the fact that there is no HT benefit, the overhead will, once again cause a roughly 1 % performance hit. The main reason to show the numbers is because we will need them again as reference in the following.

The approach we took next was to run the vase scene as shown on the last page using 3 x antialiasing to increase the runtime beyond the average time it takes to run 3DMark2001SE. As soon as the actual rendering started or, for simplicity and reproducibility exactly 1 minute into the Vase Bench, we launched 3DMark2001SE at the default settings, that is 1024x768x32 bpp.

Details of the 3DMark2001SE scores with HT turned On and Off. It is rather obvious that 3Dmark2001SE takes a severe beating from enabling HT if another very CPU intensive application runs in the background. The performance hit is around 12-14% (there was some small variance in the results)

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