Finally a benchmark where there's a notable difference between these two boards! In Rightmark's 2D audio tests, the K8TPro-939 uses less than one-third the CPU power that the QBIC 3901a uses, half the CPU power in 3D audio tests, and about two-thirds the CPU power in 3D EAX audio tests.
SiSoft Sandra
In SiSoftware's Sandra memory bandwidth test, the K8TPro-939 scores approximately 125 MB/sec better than the QBIC 3901a on average, attaining 5308/5235 MB/sec.