The GA-K8VT890-9 does not start off too well, rounding up the rear in PCMag's Business Winstone. The good news is that the gap is not too wide.
Multimedia Winstone 2004
Multimedia Winstone is a different story and the K8VT890 pulls up even with the SL-K890Pro board. Both the K8T890 boards are still slightly behind DFI's nF4 Ultra.
SiSoft Sandra Memory Bandwidth Benchmark
We noticed the 1T/2T problem in SiSoft Sandra originally. With memory timing set to Auto, benchmark scores for the GA-K8VT890 were roughly 400MB/s less than forcing 1T. The K8T890s maintain a small lead over the nForce 4 boards that we have tested.