Given that 3DMark05 is a benchmark where, ideally, repeatable,
equivalent workloads should be performed providing cards are of equal
capability, it's a shame to see DST acceleration make it into 3DMark05
as a default choice until such time as it's the case that the feature
ships with a majority of hardware. PCF even more so, for visual output
reasons too. Their inclusion in the default benchmark of the free
download version of 05 means that non-equivalent work is being done when
you're comparing cards where one or more of them don't have accelerated
DST capability.

Link:
http://www.hexus.net/content/reviews...lld19JRD04ODQ=