Configuration:\n\nMB KT3V (6712 v1.9)\nCPU Athlon XP 2000+ (Thoroughbred-B, Stepping B0)\nRAM Xerox (256 MB PC2700 DDR SDRAM) - Samsung chips\nHDD Seagate Barracuda 5, 7200rpm, 40Gb (primary master, no slave attached)\nVIAHyperion4in1449vp2\nBIOS 6712v18, 6112v19\nXP pro SP1 Windows\n\nAfter enabling Halt Detection in BIOS, there is a serious HDD slowdown (both\nreading & writing). Speed was measured by AIDA32 v3.70, HDtach v2.51 and\nSandra pro 2003.7.9.73\nHDD is almost 10 times slower with Halt Detection on (aprox only 5.5\nMb/sec).\nI owned a while ago KT3 Ultra2 MB and there was no problem at all with HDD\nspeed and Halt Detection enabled.\nIs that a bug in KT3V BIOS???\n\n\nBTW, after I changed FSB from 133 to 166MHz, AGP & PCI slots runs on higher\nfrequencies than normal (obviously, there is no auto-reducing multiplier\nfrom 1/4 to 1/5). That was just a short test to check CPU overclocking -\nsystem normally runs at default settings & values.\nIs there perhaps somewhere any other BIOS with auto 1/5\nmultiplier available? Or mother-board is setting multiplier depending of\ndetected CPU (Barton, Thoroughbred...)?