Hi ,i want to try and clock my sempron 2800+. 462 socket , m/board is a K7VT4A, 2 gig ram ddr 333, - FSB 333/266 MHz Chipset - Northbridge: VIA® KT400A - Southbridge: VIA® 8237, running vista , Hybrid Booster: - CPU Frequency Stepless control - CPU Multiplier - CPU Vcore Adjustment - ASRock U-COP thanks

Do you realize we have an overclocking forum? If your board has the 8237 southbridge, it's the K7VT4A Pro, not the plain K7VT4A. http://www.asrock.com/MB/overview.a... And the problem with VIA based boards is that there's generally no way to lock the PCI/AGP at their defaults of 33/66MHz. That limits the overclockability. The max you can increase the FSB without the PCI/AGP going too far out of spec is 188MHz...that would put the CPU at about 2.25GHz, which is a 12.5% increase. Make your increases in small increments, do not jump straight to 188MHz. You *may* have to increase both the CPU & RAM voltage to stabilize the system. And make sure the RAM stays in step at 1:1 ratio. Since you have DDR333, it may also limit the overclock. You won't know until you try. BTW, do your overclocking manually thru the BIOS...do NOT use a software program. And make sure Spread Spectrum is disabled.